/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/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:59:30,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:59:30,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:59:30,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:59:30,713 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 13:59:30,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:59:30,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:59:30,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:59:30,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:59:30,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:59:30,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:59:30,737 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:59:30,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:59:30,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:59:30,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:59:30,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:59:30,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:59:30,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:59:30,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:59:30,740 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:59:30,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:59:30,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:59:31,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:59:31,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:59:31,008 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:59:31,010 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:59:31,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2021-06-05 13:59:31,011 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2021-06-05 13:59:31,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:59:31,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:59:31,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:59:31,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:59:31,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:59:31,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:59:31,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:59:31,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:59:31,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:59:31,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/1) ... [2021-06-05 13:59:31,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:59:31,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:59:31,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:59:31,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:59:31,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (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 13:59:31,142 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:59:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:59:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:59:31,142 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:59:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:59:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:59:31,142 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:59:31,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:59:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:59:31,144 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 13:59:31,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:59:31,306 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:59:31,307 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 13:59:31,308 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:59:31 BoogieIcfgContainer [2021-06-05 13:59:31,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:59:31,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:59:31,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:59:31,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:59:31,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:31" (1/2) ... [2021-06-05 13:59:31,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b52367e and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:59:31, skipping insertion in model container [2021-06-05 13:59:31,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:59:31" (2/2) ... [2021-06-05 13:59:31,318 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2021-06-05 13:59:31,338 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:59:31,338 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:59:31,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:59:31,339 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:59:31,369 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:59:31,401 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:59:31,413 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:59:31,413 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:59:31,413 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:59:31,413 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:59:31,413 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:59:31,413 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:59:31,414 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:59:31,414 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:59:31,419 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 13:59:31,426 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) 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 13:59:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) 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 13:59:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:59:31,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:31,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:31,432 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:31,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1485035801, now seen corresponding path program 1 times [2021-06-05 13:59:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:31,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769676490] [2021-06-05 13:59:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:31,621 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 13:59:31,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769676490] [2021-06-05 13:59:31,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769676490] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:31,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:31,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:59:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628301345] [2021-06-05 13:59:31,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:59:31,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:59:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:31,636 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) 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) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:31,682 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 13:59:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:59:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:59:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:31,690 INFO L225 Difference]: With dead ends: 26 [2021-06-05 13:59:31,690 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 13:59:31,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 13:59:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 13:59:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 13:59:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 13:59:31,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 13:59:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:31,715 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 13:59:31,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 13:59:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:59:31,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:31,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:31,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:59:31,716 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:31,720 INFO L82 PathProgramCache]: Analyzing trace with hash -258877683, now seen corresponding path program 2 times [2021-06-05 13:59:31,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:31,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175315378] [2021-06-05 13:59:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:31,778 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 13:59:31,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:31,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175315378] [2021-06-05 13:59:31,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175315378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:31,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:31,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:59:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257546322] [2021-06-05 13:59:31,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:59:31,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:59:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:31,784 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:31,814 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 13:59:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:59:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:59:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:31,816 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:59:31,816 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 13:59:31,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 13:59:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 13:59:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 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 13:59:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 13:59:31,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 13:59:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:31,825 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 13:59:31,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 13:59:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:31,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:31,826 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:31,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:59:31,827 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2042651181, now seen corresponding path program 1 times [2021-06-05 13:59:31,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:31,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342870198] [2021-06-05 13:59:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:31,904 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 13:59:31,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342870198] [2021-06-05 13:59:31,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342870198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630397361] [2021-06-05 13:59:31,905 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 13:59:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 13:59:32,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:32,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:32,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:32,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 13:59:32,097 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 13:59:32,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630397361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:32,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:32,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 13:59:32,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973637159] [2021-06-05 13:59:32,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:32,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:32,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:32,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:32,099 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:32,162 INFO L93 Difference]: Finished difference Result 32 states and 58 transitions. [2021-06-05 13:59:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:59:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:59:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:32,163 INFO L225 Difference]: With dead ends: 32 [2021-06-05 13:59:32,163 INFO L226 Difference]: Without dead ends: 27 [2021-06-05 13:59:32,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-06-05 13:59:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-06-05 13:59:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2021-06-05 13:59:32,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2021-06-05 13:59:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:32,166 INFO L482 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2021-06-05 13:59:32,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2021-06-05 13:59:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:32,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:32,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:32,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 13:59:32,377 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -413298669, now seen corresponding path program 2 times [2021-06-05 13:59:32,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:32,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863384113] [2021-06-05 13:59:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:32,402 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 13:59:32,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:32,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863384113] [2021-06-05 13:59:32,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863384113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:32,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202054966] [2021-06-05 13:59:32,403 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 13:59:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:32,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:59:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:32,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 13:59:32,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:32,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:32,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:32,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 13:59:32,480 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 13:59:32,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202054966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:32,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:32,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 13:59:32,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999511205] [2021-06-05 13:59:32,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:32,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:32,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:32,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:32,481 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) 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 13:59:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:32,539 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-06-05 13:59:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) 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 11 [2021-06-05 13:59:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:32,540 INFO L225 Difference]: With dead ends: 43 [2021-06-05 13:59:32,541 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 13:59:32,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 13:59:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-06-05 13:59:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 13:59:32,551 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 13:59:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:32,551 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 13:59:32,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) 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 13:59:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 13:59:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:32,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:32,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:32,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:32,761 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2049322798, now seen corresponding path program 1 times [2021-06-05 13:59:32,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:32,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714676836] [2021-06-05 13:59:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:32,776 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 13:59:32,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:32,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714676836] [2021-06-05 13:59:32,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714676836] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:32,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:32,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:59:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087871861] [2021-06-05 13:59:32,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:59:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:59:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:59:32,777 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:32,794 INFO L93 Difference]: Finished difference Result 30 states and 55 transitions. [2021-06-05 13:59:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:59:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:59:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:32,795 INFO L225 Difference]: With dead ends: 30 [2021-06-05 13:59:32,795 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 13:59:32,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:59:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 13:59:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-06-05 13:59:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-05 13:59:32,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-06-05 13:59:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:32,798 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-05 13:59:32,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-05 13:59:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:32,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:32,798 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:32,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:59:32,799 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 268202073, now seen corresponding path program 3 times [2021-06-05 13:59:32,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:32,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207215285] [2021-06-05 13:59:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:32,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207215285] [2021-06-05 13:59:32,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207215285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265682402] [2021-06-05 13:59:32,818 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 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 13:59:32,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:59:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:32,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265682402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:32,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:32,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:32,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76459269] [2021-06-05 13:59:32,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:32,874 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:32,919 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2021-06-05 13:59:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:32,920 INFO L225 Difference]: With dead ends: 51 [2021-06-05 13:59:32,920 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 13:59:32,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 13:59:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2021-06-05 13:59:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 54 transitions. [2021-06-05 13:59:32,928 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 54 transitions. Word has length 12 [2021-06-05 13:59:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:32,928 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 54 transitions. [2021-06-05 13:59:32,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 54 transitions. [2021-06-05 13:59:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:32,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:32,930 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:33,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:33,137 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1927934254, now seen corresponding path program 1 times [2021-06-05 13:59:33,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:33,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364449837] [2021-06-05 13:59:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:33,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:33,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364449837] [2021-06-05 13:59:33,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364449837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:33,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130789650] [2021-06-05 13:59:33,158 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 13:59:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:33,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130789650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:33,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:33,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:33,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952393125] [2021-06-05 13:59:33,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:33,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:33,213 INFO L87 Difference]: Start difference. First operand 28 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:33,257 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-06-05 13:59:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:33,258 INFO L225 Difference]: With dead ends: 57 [2021-06-05 13:59:33,258 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 13:59:33,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 13:59:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2021-06-05 13:59:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-06-05 13:59:33,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 12 [2021-06-05 13:59:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:33,261 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-06-05 13:59:33,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-06-05 13:59:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:33,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:33,262 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:33,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:33,477 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1897554585, now seen corresponding path program 4 times [2021-06-05 13:59:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:33,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339920074] [2021-06-05 13:59:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:33,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:33,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339920074] [2021-06-05 13:59:33,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339920074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:33,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113195579] [2021-06-05 13:59:33,500 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 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 13:59:33,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:33,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113195579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:33,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:33,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:33,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985795164] [2021-06-05 13:59:33,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:33,573 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:33,610 INFO L93 Difference]: Finished difference Result 43 states and 76 transitions. [2021-06-05 13:59:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:33,611 INFO L225 Difference]: With dead ends: 43 [2021-06-05 13:59:33,611 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 13:59:33,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 13:59:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-06-05 13:59:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 62 transitions. [2021-06-05 13:59:33,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 62 transitions. Word has length 12 [2021-06-05 13:59:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:33,613 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 62 transitions. [2021-06-05 13:59:33,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 62 transitions. [2021-06-05 13:59:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:33,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:33,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:33,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 13:59:33,825 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash 261530456, now seen corresponding path program 2 times [2021-06-05 13:59:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:33,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305321906] [2021-06-05 13:59:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:33,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:33,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305321906] [2021-06-05 13:59:33,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305321906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:33,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516784951] [2021-06-05 13:59:33,850 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 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 13:59:33,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:33,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:33,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:33,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516784951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:33,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:33,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:33,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929948333] [2021-06-05 13:59:33,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:33,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:33,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:33,899 INFO L87 Difference]: Start difference. First operand 32 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:33,933 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-06-05 13:59:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:33,934 INFO L225 Difference]: With dead ends: 45 [2021-06-05 13:59:33,934 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 13:59:33,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 13:59:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-06-05 13:59:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-06-05 13:59:33,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-06-05 13:59:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-06-05 13:59:33,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-06-05 13:59:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:33,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:33,937 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:34,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:34,141 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:34,141 INFO L82 PathProgramCache]: Analyzing trace with hash -905381939, now seen corresponding path program 5 times [2021-06-05 13:59:34,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:34,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028170871] [2021-06-05 13:59:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:34,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:34,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028170871] [2021-06-05 13:59:34,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028170871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:34,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:34,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:59:34,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667212131] [2021-06-05 13:59:34,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:59:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:34,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:59:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:34,167 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:34,180 INFO L93 Difference]: Finished difference Result 33 states and 59 transitions. [2021-06-05 13:59:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:59:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:34,180 INFO L225 Difference]: With dead ends: 33 [2021-06-05 13:59:34,180 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 13:59:34,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 13:59:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-06-05 13:59:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-06-05 13:59:34,182 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-06-05 13:59:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:34,183 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-06-05 13:59:34,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-06-05 13:59:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:34,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:34,183 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:34,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:59:34,183 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1796703570, now seen corresponding path program 3 times [2021-06-05 13:59:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:34,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475932402] [2021-06-05 13:59:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:34,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:34,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475932402] [2021-06-05 13:59:34,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475932402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:34,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8732601] [2021-06-05 13:59:34,201 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:34,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:34,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:34,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8732601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:34,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:34,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:34,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092183826] [2021-06-05 13:59:34,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:34,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:34,267 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 13:59:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:34,311 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-06-05 13:59:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12 [2021-06-05 13:59:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:34,312 INFO L225 Difference]: With dead ends: 40 [2021-06-05 13:59:34,312 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 13:59:34,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 13:59:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-06-05 13:59:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-06-05 13:59:34,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 12 [2021-06-05 13:59:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:34,314 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-06-05 13:59:34,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 13:59:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-06-05 13:59:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:34,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:34,315 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:34,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 13:59:34,537 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 549941096, now seen corresponding path program 4 times [2021-06-05 13:59:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:34,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316238748] [2021-06-05 13:59:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:34,590 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 13:59:34,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:34,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316238748] [2021-06-05 13:59:34,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316238748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:34,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153030927] [2021-06-05 13:59:34,591 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 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 13:59:34,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:34,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:34,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:34,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:34,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:34,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:34,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:34,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:59:34,787 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 13:59:34,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153030927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:34,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:34,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318364389] [2021-06-05 13:59:34,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:34,788 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:34,853 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2021-06-05 13:59:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:34,854 INFO L225 Difference]: With dead ends: 48 [2021-06-05 13:59:34,854 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 13:59:34,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 13:59:34,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-06-05 13:59:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 67 transitions. [2021-06-05 13:59:34,856 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 67 transitions. Word has length 13 [2021-06-05 13:59:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:34,856 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 67 transitions. [2021-06-05 13:59:34,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 67 transitions. [2021-06-05 13:59:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:34,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:34,857 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:35,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 13:59:35,069 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1116462702, now seen corresponding path program 5 times [2021-06-05 13:59:35,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:35,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849857320] [2021-06-05 13:59:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:35,110 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 13:59:35,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:35,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849857320] [2021-06-05 13:59:35,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849857320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:35,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314811429] [2021-06-05 13:59:35,110 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 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 13:59:35,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:35,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:35,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:35,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:35,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:35,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:35,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:35,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:35,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:35,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:59:35,252 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 13:59:35,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314811429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:35,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:35,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:35,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793349262] [2021-06-05 13:59:35,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:35,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:35,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:35,254 INFO L87 Difference]: Start difference. First operand 35 states and 67 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:35,342 INFO L93 Difference]: Finished difference Result 59 states and 114 transitions. [2021-06-05 13:59:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:35,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:35,343 INFO L225 Difference]: With dead ends: 59 [2021-06-05 13:59:35,343 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 13:59:35,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 13:59:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-06-05 13:59:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 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 13:59:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-06-05 13:59:35,351 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-06-05 13:59:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:35,351 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-06-05 13:59:35,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-06-05 13:59:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:35,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:35,353 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:35,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:59:35,555 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash -257588172, now seen corresponding path program 6 times [2021-06-05 13:59:35,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:35,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564126738] [2021-06-05 13:59:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:35,601 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 13:59:35,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:35,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564126738] [2021-06-05 13:59:35,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564126738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374317279] [2021-06-05 13:59:35,605 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:35,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:35,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:35,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:35,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:35,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 13:59:35,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:35,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:35,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:35,771 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:35,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:35,772 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-06-05 13:59:35,794 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 13:59:35,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374317279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:35,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:35,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:35,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404432015] [2021-06-05 13:59:35,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:35,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:35,795 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:35,899 INFO L93 Difference]: Finished difference Result 76 states and 152 transitions. [2021-06-05 13:59:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:35,900 INFO L225 Difference]: With dead ends: 76 [2021-06-05 13:59:35,900 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 13:59:35,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 13:59:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2021-06-05 13:59:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 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 13:59:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-06-05 13:59:35,902 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-06-05 13:59:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:35,902 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-06-05 13:59:35,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-06-05 13:59:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:35,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:35,903 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:36,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:36,122 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1120270568, now seen corresponding path program 7 times [2021-06-05 13:59:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:36,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685703207] [2021-06-05 13:59:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:36,171 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 13:59:36,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685703207] [2021-06-05 13:59:36,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685703207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:36,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045069757] [2021-06-05 13:59:36,171 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 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 13:59:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:36,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:36,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:36,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:36,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:36,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:36,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:59:36,299 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 13:59:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045069757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:36,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:36,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:36,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071021971] [2021-06-05 13:59:36,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:36,300 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:36,409 INFO L93 Difference]: Finished difference Result 61 states and 123 transitions. [2021-06-05 13:59:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:36,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:36,410 INFO L225 Difference]: With dead ends: 61 [2021-06-05 13:59:36,410 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 13:59:36,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 13:59:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-06-05 13:59:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 95 transitions. [2021-06-05 13:59:36,412 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 95 transitions. Word has length 13 [2021-06-05 13:59:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:36,412 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 95 transitions. [2021-06-05 13:59:36,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 95 transitions. [2021-06-05 13:59:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:36,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:36,413 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:36,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:59:36,631 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1979145098, now seen corresponding path program 8 times [2021-06-05 13:59:36,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:36,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798551771] [2021-06-05 13:59:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:36,677 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 13:59:36,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:36,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798551771] [2021-06-05 13:59:36,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798551771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:36,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34763041] [2021-06-05 13:59:36,677 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 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 13:59:36,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:36,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:36,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:36,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:36,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 13:59:36,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:36,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:36,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:36,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:36,815 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:36,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:36,816 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-06-05 13:59:36,838 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 13:59:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34763041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:36,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:36,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48243866] [2021-06-05 13:59:36,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:36,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:36,839 INFO L87 Difference]: Start difference. First operand 43 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:36,969 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-06-05 13:59:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:36,969 INFO L225 Difference]: With dead ends: 84 [2021-06-05 13:59:36,969 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 13:59:36,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 13:59:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-06-05 13:59:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-06-05 13:59:36,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-06-05 13:59:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:36,971 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-06-05 13:59:36,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-06-05 13:59:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:36,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:36,972 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:37,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:59:37,188 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash -605208890, now seen corresponding path program 9 times [2021-06-05 13:59:37,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:37,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593376967] [2021-06-05 13:59:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:37,225 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 13:59:37,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:37,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593376967] [2021-06-05 13:59:37,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593376967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:37,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284829781] [2021-06-05 13:59:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:37,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:37,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:37,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:37,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 13:59:37,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:37,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:37,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:37,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:37,391 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:37,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:37,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-06-05 13:59:37,417 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 13:59:37,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284829781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:37,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:37,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:37,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926405370] [2021-06-05 13:59:37,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:37,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:37,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:37,419 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:37,544 INFO L93 Difference]: Finished difference Result 64 states and 135 transitions. [2021-06-05 13:59:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:37,545 INFO L225 Difference]: With dead ends: 64 [2021-06-05 13:59:37,545 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 13:59:37,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:59:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 13:59:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2021-06-05 13:59:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-06-05 13:59:37,547 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-06-05 13:59:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:37,547 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-06-05 13:59:37,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-06-05 13:59:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:37,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:37,548 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:37,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 13:59:37,764 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:37,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1739525202, now seen corresponding path program 10 times [2021-06-05 13:59:37,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:37,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671629760] [2021-06-05 13:59:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:37,812 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 13:59:37,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:37,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671629760] [2021-06-05 13:59:37,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671629760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:37,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739491193] [2021-06-05 13:59:37,813 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:37,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:37,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:37,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:37,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:37,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:37,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:37,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:37,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:59:37,945 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 13:59:37,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739491193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:37,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:37,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:37,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314265166] [2021-06-05 13:59:37,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:37,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:37,946 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:38,062 INFO L93 Difference]: Finished difference Result 67 states and 142 transitions. [2021-06-05 13:59:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:38,063 INFO L225 Difference]: With dead ends: 67 [2021-06-05 13:59:38,063 INFO L226 Difference]: Without dead ends: 53 [2021-06-05 13:59:38,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-05 13:59:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-06-05 13:59:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 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 13:59:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-06-05 13:59:38,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-06-05 13:59:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:38,065 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-06-05 13:59:38,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-06-05 13:59:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:38,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:38,065 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:38,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:38,281 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1696567564, now seen corresponding path program 11 times [2021-06-05 13:59:38,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:38,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621668160] [2021-06-05 13:59:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:38,320 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 13:59:38,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:38,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621668160] [2021-06-05 13:59:38,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621668160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:38,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336949968] [2021-06-05 13:59:38,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:38,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:38,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:38,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 13:59:38,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:38,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:38,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:38,462 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:38,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:38,462 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-06-05 13:59:38,481 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 13:59:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336949968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:38,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:38,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:38,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771030463] [2021-06-05 13:59:38,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:38,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:38,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:38,482 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:38,635 INFO L93 Difference]: Finished difference Result 89 states and 192 transitions. [2021-06-05 13:59:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:38,636 INFO L225 Difference]: With dead ends: 89 [2021-06-05 13:59:38,636 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 13:59:38,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:59:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 13:59:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-06-05 13:59:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 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 13:59:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-06-05 13:59:38,638 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-06-05 13:59:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:38,638 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-06-05 13:59:38,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-06-05 13:59:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:38,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:38,639 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:38,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:59:38,852 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:38,852 INFO L82 PathProgramCache]: Analyzing trace with hash 14045744, now seen corresponding path program 12 times [2021-06-05 13:59:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297466556] [2021-06-05 13:59:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:38,898 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 13:59:38,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:38,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297466556] [2021-06-05 13:59:38,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297466556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:38,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582909633] [2021-06-05 13:59:38,898 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 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 13:59:38,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:59:38,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:38,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:38,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 13:59:38,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:39,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:39,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:39,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:39,015 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:39,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:39,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-06-05 13:59:39,035 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 13:59:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582909633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:39,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:39,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026764157] [2021-06-05 13:59:39,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:39,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:39,036 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:39,176 INFO L93 Difference]: Finished difference Result 72 states and 158 transitions. [2021-06-05 13:59:39,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:39,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:39,176 INFO L225 Difference]: With dead ends: 72 [2021-06-05 13:59:39,176 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 13:59:39,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:59:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 13:59:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-06-05 13:59:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 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 13:59:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-06-05 13:59:39,178 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-06-05 13:59:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:39,178 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-06-05 13:59:39,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-06-05 13:59:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:39,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:39,179 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:39,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:39,381 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1503450740, now seen corresponding path program 13 times [2021-06-05 13:59:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:39,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772736397] [2021-06-05 13:59:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:39,427 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 13:59:39,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:39,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772736397] [2021-06-05 13:59:39,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772736397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:39,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489113471] [2021-06-05 13:59:39,428 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 13:59:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:39,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-06-05 13:59:39,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:39,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:39,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:39,563 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:39,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:39,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-06-05 13:59:39,582 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 13:59:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489113471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:39,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:39,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:39,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941729035] [2021-06-05 13:59:39,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:39,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:39,583 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:39,758 INFO L93 Difference]: Finished difference Result 77 states and 171 transitions. [2021-06-05 13:59:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:39,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13 [2021-06-05 13:59:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:39,759 INFO L225 Difference]: With dead ends: 77 [2021-06-05 13:59:39,759 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 13:59:39,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:59:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 13:59:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-06-05 13:59:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-06-05 13:59:39,761 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 13 [2021-06-05 13:59:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:39,762 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-06-05 13:59:39,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 13:59:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-06-05 13:59:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:39,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:39,762 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:39,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:39,973 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash 781826158, now seen corresponding path program 14 times [2021-06-05 13:59:39,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:39,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060530945] [2021-06-05 13:59:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:40,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:40,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060530945] [2021-06-05 13:59:40,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060530945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345381757] [2021-06-05 13:59:40,010 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 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 13:59:40,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:40,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:40,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:40,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:40,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:40,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:40,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:40,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:40,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345381757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:40,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547861536] [2021-06-05 13:59:40,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:40,137 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:40,235 INFO L93 Difference]: Finished difference Result 68 states and 151 transitions. [2021-06-05 13:59:40,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:59:40,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-06-05 13:59:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:40,236 INFO L225 Difference]: With dead ends: 68 [2021-06-05 13:59:40,236 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 13:59:40,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 13:59:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-06-05 13:59:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-06-05 13:59:40,238 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-06-05 13:59:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:40,238 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-06-05 13:59:40,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-06-05 13:59:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:40,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:40,239 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:40,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 13:59:40,453 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:40,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1352155630, now seen corresponding path program 15 times [2021-06-05 13:59:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:40,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802150118] [2021-06-05 13:59:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:40,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802150118] [2021-06-05 13:59:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802150118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314287190] [2021-06-05 13:59:40,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:40,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:40,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:40,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:40,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:40,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:40,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:40,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:40,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314287190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:40,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:40,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985495348] [2021-06-05 13:59:40,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:40,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:40,615 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:40,718 INFO L93 Difference]: Finished difference Result 91 states and 189 transitions. [2021-06-05 13:59:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:59:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-06-05 13:59:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:40,719 INFO L225 Difference]: With dead ends: 91 [2021-06-05 13:59:40,719 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 13:59:40,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 13:59:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-06-05 13:59:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-06-05 13:59:40,721 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-06-05 13:59:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:40,721 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-06-05 13:59:40,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-06-05 13:59:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:40,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:40,722 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:40,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:40,925 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash -373323828, now seen corresponding path program 16 times [2021-06-05 13:59:40,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:40,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036094619] [2021-06-05 13:59:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:40,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036094619] [2021-06-05 13:59:40,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036094619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810086283] [2021-06-05 13:59:40,962 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 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 13:59:40,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:40,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:41,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:41,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:41,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:41,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:41,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:41,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810086283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:41,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:41,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919996479] [2021-06-05 13:59:41,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:41,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:41,095 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:41,271 INFO L93 Difference]: Finished difference Result 91 states and 193 transitions. [2021-06-05 13:59:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:59:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 14 [2021-06-05 13:59:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:41,272 INFO L225 Difference]: With dead ends: 91 [2021-06-05 13:59:41,272 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 13:59:41,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 13:59:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-06-05 13:59:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-06-05 13:59:41,274 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 14 [2021-06-05 13:59:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:41,274 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-06-05 13:59:41,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-06-05 13:59:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:41,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:41,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:41,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 13:59:41,485 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2009347957, now seen corresponding path program 17 times [2021-06-05 13:59:41,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:41,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750506659] [2021-06-05 13:59:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:41,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750506659] [2021-06-05 13:59:41,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750506659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299455597] [2021-06-05 13:59:41,507 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 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 13:59:41,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:41,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:41,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:59:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299455597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:41,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:59:41,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561564277] [2021-06-05 13:59:41,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:41,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:41,562 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:41,586 INFO L93 Difference]: Finished difference Result 121 states and 238 transitions. [2021-06-05 13:59:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 13:59:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:41,587 INFO L225 Difference]: With dead ends: 121 [2021-06-05 13:59:41,587 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:59:41,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:59:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 62. [2021-06-05 13:59:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-06-05 13:59:41,589 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-06-05 13:59:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:41,589 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-06-05 13:59:41,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-06-05 13:59:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:41,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:41,589 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:41,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:41,801 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1971410264, now seen corresponding path program 18 times [2021-06-05 13:59:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:41,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224058707] [2021-06-05 13:59:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:41,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224058707] [2021-06-05 13:59:41,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224058707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574524440] [2021-06-05 13:59:41,842 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 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 13:59:41,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:41,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:41,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:41,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:41,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:41,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:41,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:41,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574524440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:41,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:41,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638851449] [2021-06-05 13:59:41,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:41,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:41,967 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:42,092 INFO L93 Difference]: Finished difference Result 85 states and 189 transitions. [2021-06-05 13:59:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:59:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-06-05 13:59:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:42,093 INFO L225 Difference]: With dead ends: 85 [2021-06-05 13:59:42,093 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 13:59:42,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 13:59:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-06-05 13:59:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-06-05 13:59:42,095 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-06-05 13:59:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:42,095 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-06-05 13:59:42,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-06-05 13:59:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:42,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:42,096 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:42,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:42,312 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 245930806, now seen corresponding path program 19 times [2021-06-05 13:59:42,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:42,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287173823] [2021-06-05 13:59:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:42,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287173823] [2021-06-05 13:59:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287173823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485856825] [2021-06-05 13:59:42,346 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:42,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:42,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:42,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:42,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:42,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:42,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485856825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:42,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926071253] [2021-06-05 13:59:42,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:42,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:42,459 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:42,544 INFO L93 Difference]: Finished difference Result 88 states and 187 transitions. [2021-06-05 13:59:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 14 [2021-06-05 13:59:42,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:42,545 INFO L225 Difference]: With dead ends: 88 [2021-06-05 13:59:42,545 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 13:59:42,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 13:59:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2021-06-05 13:59:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-06-05 13:59:42,547 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-06-05 13:59:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:42,547 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-06-05 13:59:42,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-06-05 13:59:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:42,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:42,547 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:42,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:59:42,761 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1735335802, now seen corresponding path program 20 times [2021-06-05 13:59:42,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:42,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479006010] [2021-06-05 13:59:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:42,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479006010] [2021-06-05 13:59:42,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479006010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716257484] [2021-06-05 13:59:42,798 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 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 13:59:42,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:42,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:42,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:42,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:42,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:42,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:42,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:42,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716257484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:42,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:42,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483709575] [2021-06-05 13:59:42,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:42,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:42,912 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,018 INFO L93 Difference]: Finished difference Result 100 states and 215 transitions. [2021-06-05 13:59:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 14 [2021-06-05 13:59:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:43,018 INFO L225 Difference]: With dead ends: 100 [2021-06-05 13:59:43,018 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 13:59:43,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 13:59:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-06-05 13:59:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-06-05 13:59:43,020 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-06-05 13:59:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:43,020 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-06-05 13:59:43,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-06-05 13:59:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:43,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:43,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:43,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:43,236 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:43,237 INFO L82 PathProgramCache]: Analyzing trace with hash 844014171, now seen corresponding path program 21 times [2021-06-05 13:59:43,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:43,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766043493] [2021-06-05 13:59:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:43,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766043493] [2021-06-05 13:59:43,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766043493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811328509] [2021-06-05 13:59:43,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:43,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:59:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811328509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:43,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:59:43,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78624057] [2021-06-05 13:59:43,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:43,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:43,314 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,357 INFO L93 Difference]: Finished difference Result 145 states and 286 transitions. [2021-06-05 13:59:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:59:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 13:59:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:43,362 INFO L225 Difference]: With dead ends: 145 [2021-06-05 13:59:43,362 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 13:59:43,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 13:59:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 68. [2021-06-05 13:59:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-06-05 13:59:43,364 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-06-05 13:59:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:43,364 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-06-05 13:59:43,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-06-05 13:59:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:43,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:43,364 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:43,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:59:43,565 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:43,565 INFO L82 PathProgramCache]: Analyzing trace with hash -306532562, now seen corresponding path program 22 times [2021-06-05 13:59:43,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:43,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054766051] [2021-06-05 13:59:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054766051] [2021-06-05 13:59:43,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054766051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813322418] [2021-06-05 13:59:43,605 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 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 13:59:43,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:43,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:43,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:43,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:43,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:43,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:43,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813322418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:43,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:43,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605620307] [2021-06-05 13:59:43,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:43,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:43,721 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,822 INFO L93 Difference]: Finished difference Result 86 states and 210 transitions. [2021-06-05 13:59:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-06-05 13:59:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:43,823 INFO L225 Difference]: With dead ends: 86 [2021-06-05 13:59:43,823 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 13:59:43,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 13:59:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-06-05 13:59:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-06-05 13:59:43,825 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-06-05 13:59:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:43,825 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-06-05 13:59:43,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 13:59:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-06-05 13:59:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:43,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:43,826 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:44,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:59:44,037 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2032012020, now seen corresponding path program 23 times [2021-06-05 13:59:44,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:44,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653640589] [2021-06-05 13:59:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:44,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653640589] [2021-06-05 13:59:44,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653640589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420806744] [2021-06-05 13:59:44,072 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 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 13:59:44,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:44,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:44,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:44,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:44,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:44,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:44,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:44,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420806744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:44,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:44,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295230229] [2021-06-05 13:59:44,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:44,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:44,186 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:44,270 INFO L93 Difference]: Finished difference Result 95 states and 213 transitions. [2021-06-05 13:59:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 14 [2021-06-05 13:59:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:44,271 INFO L225 Difference]: With dead ends: 95 [2021-06-05 13:59:44,271 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 13:59:44,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 13:59:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-06-05 13:59:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-06-05 13:59:44,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-06-05 13:59:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:44,273 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-06-05 13:59:44,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-06-05 13:59:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:44,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:44,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:44,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 13:59:44,489 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 626931147, now seen corresponding path program 24 times [2021-06-05 13:59:44,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:44,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754995710] [2021-06-05 13:59:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:44,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754995710] [2021-06-05 13:59:44,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754995710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145482898] [2021-06-05 13:59:44,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:44,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:44,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:59:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:44,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145482898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:44,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:59:44,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185966687] [2021-06-05 13:59:44,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:44,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:44,572 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:44,601 INFO L93 Difference]: Finished difference Result 127 states and 274 transitions. [2021-06-05 13:59:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:44,602 INFO L225 Difference]: With dead ends: 127 [2021-06-05 13:59:44,602 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 13:59:44,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 13:59:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-06-05 13:59:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-06-05 13:59:44,607 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-06-05 13:59:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:44,607 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-06-05 13:59:44,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-06-05 13:59:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:44,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:44,607 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:44,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:44,813 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -542607024, now seen corresponding path program 25 times [2021-06-05 13:59:44,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:44,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012838596] [2021-06-05 13:59:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:44,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012838596] [2021-06-05 13:59:44,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012838596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108628349] [2021-06-05 13:59:44,852 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 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 13:59:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:44,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:44,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:44,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:44,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:44,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:44,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108628349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:44,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:44,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129611191] [2021-06-05 13:59:44,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:44,974 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:45,073 INFO L93 Difference]: Finished difference Result 108 states and 241 transitions. [2021-06-05 13:59:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:45,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 14 [2021-06-05 13:59:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:45,074 INFO L225 Difference]: With dead ends: 108 [2021-06-05 13:59:45,074 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 13:59:45,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:59:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 13:59:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-06-05 13:59:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-06-05 13:59:45,076 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-06-05 13:59:45,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:45,076 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-06-05 13:59:45,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-06-05 13:59:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:45,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:45,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:45,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 13:59:45,285 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1433928655, now seen corresponding path program 26 times [2021-06-05 13:59:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292619067] [2021-06-05 13:59:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292619067] [2021-06-05 13:59:45,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292619067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818333200] [2021-06-05 13:59:45,305 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 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 13:59:45,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:45,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:59:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818333200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:45,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:59:45,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121229885] [2021-06-05 13:59:45,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:45,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:45,361 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:45,416 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-06-05 13:59:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:45,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:45,417 INFO L225 Difference]: With dead ends: 141 [2021-06-05 13:59:45,417 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 13:59:45,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 13:59:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 73. [2021-06-05 13:59:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2021-06-05 13:59:45,419 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 14 [2021-06-05 13:59:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:45,419 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2021-06-05 13:59:45,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2021-06-05 13:59:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:45,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:45,420 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:45,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:45,620 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1615692404, now seen corresponding path program 27 times [2021-06-05 13:59:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:45,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532586743] [2021-06-05 13:59:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:45,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532586743] [2021-06-05 13:59:45,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532586743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992202395] [2021-06-05 13:59:45,659 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 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 13:59:45,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:45,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 13:59:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:45,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:45,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:45,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:45,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:45,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:45,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992202395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:45,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 13:59:45,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313515031] [2021-06-05 13:59:45,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:59:45,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:45,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:59:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:45,787 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:45,916 INFO L93 Difference]: Finished difference Result 126 states and 281 transitions. [2021-06-05 13:59:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 14 [2021-06-05 13:59:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:45,917 INFO L225 Difference]: With dead ends: 126 [2021-06-05 13:59:45,917 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 13:59:45,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 13:59:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2021-06-05 13:59:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5405405405405403) internal successors, (188), 74 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2021-06-05 13:59:45,919 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 14 [2021-06-05 13:59:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:45,919 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2021-06-05 13:59:45,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) 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 13:59:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2021-06-05 13:59:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:45,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:45,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:46,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 13:59:46,125 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:46,125 INFO L82 PathProgramCache]: Analyzing trace with hash -896073077, now seen corresponding path program 28 times [2021-06-05 13:59:46,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:46,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659337594] [2021-06-05 13:59:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:46,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659337594] [2021-06-05 13:59:46,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659337594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563552422] [2021-06-05 13:59:46,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:46,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:46,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:59:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563552422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:46,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:59:46,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851389036] [2021-06-05 13:59:46,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:46,192 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:46,254 INFO L93 Difference]: Finished difference Result 117 states and 263 transitions. [2021-06-05 13:59:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:59:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:46,254 INFO L225 Difference]: With dead ends: 117 [2021-06-05 13:59:46,254 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 13:59:46,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 13:59:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-06-05 13:59:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 79 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-06-05 13:59:46,256 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 14 [2021-06-05 13:59:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:46,256 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-06-05 13:59:46,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-06-05 13:59:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:46,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:46,257 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:46,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 13:59:46,465 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -619671512, now seen corresponding path program 29 times [2021-06-05 13:59:46,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:46,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860453371] [2021-06-05 13:59:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:46,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860453371] [2021-06-05 13:59:46,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860453371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346949875] [2021-06-05 13:59:46,490 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 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 13:59:46,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:46,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346949875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:46,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:46,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385880936] [2021-06-05 13:59:46,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:46,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:46,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:46,535 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:46,592 INFO L93 Difference]: Finished difference Result 152 states and 318 transitions. [2021-06-05 13:59:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:59:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:46,593 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:59:46,593 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 13:59:46,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 13:59:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-06-05 13:59:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.6463414634146343) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 217 transitions. [2021-06-05 13:59:46,595 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 217 transitions. Word has length 15 [2021-06-05 13:59:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:46,595 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 217 transitions. [2021-06-05 13:59:46,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 217 transitions. [2021-06-05 13:59:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:46,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:46,596 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:46,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 13:59:46,805 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash -707581453, now seen corresponding path program 30 times [2021-06-05 13:59:46,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:46,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365551671] [2021-06-05 13:59:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:46,829 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 13:59:46,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:46,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365551671] [2021-06-05 13:59:46,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365551671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303072736] [2021-06-05 13:59:46,830 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 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 13:59:46,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:46,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:46,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:46,872 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 13:59:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303072736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:46,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:46,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824901594] [2021-06-05 13:59:46,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:46,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:46,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:46,873 INFO L87 Difference]: Start difference. First operand 83 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:46,957 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-06-05 13:59:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:46,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:46,958 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:59:46,958 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 13:59:46,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 13:59:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-06-05 13:59:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.640449438202247) internal successors, (235), 89 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 13:59:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 235 transitions. [2021-06-05 13:59:46,960 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 235 transitions. Word has length 15 [2021-06-05 13:59:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:46,960 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 235 transitions. [2021-06-05 13:59:46,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 235 transitions. [2021-06-05 13:59:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:46,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:46,961 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:47,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:59:47,169 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1774821498, now seen corresponding path program 31 times [2021-06-05 13:59:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277167287] [2021-06-05 13:59:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:47,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:47,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277167287] [2021-06-05 13:59:47,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277167287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029851253] [2021-06-05 13:59:47,192 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 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 13:59:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:47,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:47,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:47,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029851253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:47,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:59:47,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014605373] [2021-06-05 13:59:47,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:47,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:47,239 INFO L87 Difference]: Start difference. First operand 90 states and 235 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:47,299 INFO L93 Difference]: Finished difference Result 119 states and 275 transitions. [2021-06-05 13:59:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:47,300 INFO L225 Difference]: With dead ends: 119 [2021-06-05 13:59:47,300 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 13:59:47,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:59:47,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 13:59:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-06-05 13:59:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 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 13:59:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 236 transitions. [2021-06-05 13:59:47,302 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 236 transitions. Word has length 15 [2021-06-05 13:59:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:47,302 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 236 transitions. [2021-06-05 13:59:47,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 236 transitions. [2021-06-05 13:59:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:47,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:47,303 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:47,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:59:47,513 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 884121669, now seen corresponding path program 32 times [2021-06-05 13:59:47,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:47,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738659442] [2021-06-05 13:59:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:47,531 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 13:59:47,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:47,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738659442] [2021-06-05 13:59:47,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738659442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604594858] [2021-06-05 13:59:47,532 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 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 13:59:47,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:47,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:47,577 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 13:59:47,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604594858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:47,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:59:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772673967] [2021-06-05 13:59:47,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:47,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:47,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:47,578 INFO L87 Difference]: Start difference. First operand 92 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:47,606 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-06-05 13:59:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:47,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:47,607 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:59:47,607 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:59:47,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:59:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 89. [2021-06-05 13:59:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2021-06-05 13:59:47,609 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 15 [2021-06-05 13:59:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:47,609 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2021-06-05 13:59:47,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2021-06-05 13:59:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:47,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:47,609 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:47,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 13:59:47,825 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 333838132, now seen corresponding path program 33 times [2021-06-05 13:59:47,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:47,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072969403] [2021-06-05 13:59:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:47,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:47,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072969403] [2021-06-05 13:59:47,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072969403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378836569] [2021-06-05 13:59:47,851 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 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 13:59:47,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:59:47,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:47,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:47,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378836569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:47,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:47,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221501726] [2021-06-05 13:59:47,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:47,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:47,892 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:47,929 INFO L93 Difference]: Finished difference Result 126 states and 290 transitions. [2021-06-05 13:59:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:47,930 INFO L225 Difference]: With dead ends: 126 [2021-06-05 13:59:47,930 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 13:59:47,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 13:59:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-06-05 13:59:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-06-05 13:59:47,932 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-06-05 13:59:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:47,932 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-06-05 13:59:47,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-06-05 13:59:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:47,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:47,933 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:48,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 13:59:48,153 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash -557483499, now seen corresponding path program 34 times [2021-06-05 13:59:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:48,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626451564] [2021-06-05 13:59:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:48,175 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 13:59:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626451564] [2021-06-05 13:59:48,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626451564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521390207] [2021-06-05 13:59:48,176 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 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 13:59:48,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:48,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:48,221 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 13:59:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521390207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:48,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:48,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065818453] [2021-06-05 13:59:48,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:48,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:48,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:48,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:48,221 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:48,268 INFO L93 Difference]: Finished difference Result 160 states and 342 transitions. [2021-06-05 13:59:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:59:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:48,269 INFO L225 Difference]: With dead ends: 160 [2021-06-05 13:59:48,269 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 13:59:48,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 13:59:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 89. [2021-06-05 13:59:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-06-05 13:59:48,271 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-06-05 13:59:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:48,271 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-06-05 13:59:48,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-06-05 13:59:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:48,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:48,272 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:48,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 13:59:48,487 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1708030232, now seen corresponding path program 35 times [2021-06-05 13:59:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:48,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045008034] [2021-06-05 13:59:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:48,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045008034] [2021-06-05 13:59:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045008034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912730505] [2021-06-05 13:59:48,510 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 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 13:59:48,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912730505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:48,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:59:48,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153670455] [2021-06-05 13:59:48,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:48,550 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:48,579 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2021-06-05 13:59:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 13:59:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:48,580 INFO L225 Difference]: With dead ends: 180 [2021-06-05 13:59:48,580 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 13:59:48,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 13:59:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 97. [2021-06-05 13:59:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.6354166666666665) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 253 transitions. [2021-06-05 13:59:48,582 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 253 transitions. Word has length 15 [2021-06-05 13:59:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:48,582 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 253 transitions. [2021-06-05 13:59:48,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 253 transitions. [2021-06-05 13:59:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:48,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:48,583 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:48,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 13:59:48,797 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1809787465, now seen corresponding path program 36 times [2021-06-05 13:59:48,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:48,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287417728] [2021-06-05 13:59:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:48,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287417728] [2021-06-05 13:59:48,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287417728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092703171] [2021-06-05 13:59:48,816 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 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 13:59:48,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:48,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:48,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:48,856 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 13:59:48,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092703171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:48,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:59:48,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876951665] [2021-06-05 13:59:48,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:48,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:48,857 INFO L87 Difference]: Start difference. First operand 97 states and 253 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:48,901 INFO L93 Difference]: Finished difference Result 152 states and 341 transitions. [2021-06-05 13:59:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:59:48,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 13:59:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:48,901 INFO L225 Difference]: With dead ends: 152 [2021-06-05 13:59:48,901 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 13:59:48,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 13:59:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-06-05 13:59:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.676470588235294) internal successors, (273), 102 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 273 transitions. [2021-06-05 13:59:48,904 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 273 transitions. Word has length 15 [2021-06-05 13:59:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:48,904 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 273 transitions. [2021-06-05 13:59:48,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 273 transitions. [2021-06-05 13:59:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:48,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:48,904 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:49,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:49,121 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:49,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:49,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104694, now seen corresponding path program 37 times [2021-06-05 13:59:49,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:49,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443602447] [2021-06-05 13:59:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:49,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443602447] [2021-06-05 13:59:49,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443602447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950742079] [2021-06-05 13:59:49,146 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 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 13:59:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:49,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950742079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:49,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:49,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374701623] [2021-06-05 13:59:49,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:49,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:49,183 INFO L87 Difference]: Start difference. First operand 103 states and 273 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:49,235 INFO L93 Difference]: Finished difference Result 161 states and 375 transitions. [2021-06-05 13:59:49,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:49,236 INFO L225 Difference]: With dead ends: 161 [2021-06-05 13:59:49,236 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 13:59:49,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:59:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 13:59:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 105. [2021-06-05 13:59:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6538461538461537) internal successors, (276), 104 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 276 transitions. [2021-06-05 13:59:49,238 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 276 transitions. Word has length 15 [2021-06-05 13:59:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:49,239 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 276 transitions. [2021-06-05 13:59:49,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 276 transitions. [2021-06-05 13:59:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:49,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:49,239 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:49,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:49,453 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1459540971, now seen corresponding path program 38 times [2021-06-05 13:59:49,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:49,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526581464] [2021-06-05 13:59:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:49,474 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 13:59:49,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526581464] [2021-06-05 13:59:49,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526581464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789586935] [2021-06-05 13:59:49,474 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 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 13:59:49,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:49,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:49,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:49,514 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 13:59:49,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789586935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:49,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:49,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595361544] [2021-06-05 13:59:49,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:49,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:49,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:49,515 INFO L87 Difference]: Start difference. First operand 105 states and 276 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:49,553 INFO L93 Difference]: Finished difference Result 156 states and 350 transitions. [2021-06-05 13:59:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:49,554 INFO L225 Difference]: With dead ends: 156 [2021-06-05 13:59:49,554 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 13:59:49,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 13:59:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-06-05 13:59:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.6020408163265305) internal successors, (255), 98 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2021-06-05 13:59:49,556 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 15 [2021-06-05 13:59:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:49,556 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2021-06-05 13:59:49,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2021-06-05 13:59:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:49,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:49,557 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:49,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:49,765 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:49,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1277777222, now seen corresponding path program 39 times [2021-06-05 13:59:49,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:49,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597223417] [2021-06-05 13:59:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:49,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597223417] [2021-06-05 13:59:49,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597223417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556579250] [2021-06-05 13:59:49,790 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 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 13:59:49,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:49,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:49,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556579250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:49,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3521334] [2021-06-05 13:59:49,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:49,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:49,842 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:49,914 INFO L93 Difference]: Finished difference Result 165 states and 373 transitions. [2021-06-05 13:59:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:49,915 INFO L225 Difference]: With dead ends: 165 [2021-06-05 13:59:49,915 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 13:59:49,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 13:59:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-06-05 13:59:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5686274509803924) internal successors, (262), 102 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2021-06-05 13:59:49,917 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 15 [2021-06-05 13:59:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:49,917 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2021-06-05 13:59:49,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2021-06-05 13:59:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:49,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:49,918 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:50,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 13:59:50,133 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1997396549, now seen corresponding path program 40 times [2021-06-05 13:59:50,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:50,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545293221] [2021-06-05 13:59:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:50,155 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 13:59:50,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545293221] [2021-06-05 13:59:50,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545293221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242377202] [2021-06-05 13:59:50,156 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:50,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:50,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:50,200 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 13:59:50,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242377202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:50,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:50,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937031499] [2021-06-05 13:59:50,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:50,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:50,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:50,201 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:50,266 INFO L93 Difference]: Finished difference Result 164 states and 357 transitions. [2021-06-05 13:59:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 13:59:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:50,266 INFO L225 Difference]: With dead ends: 164 [2021-06-05 13:59:50,266 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 13:59:50,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 13:59:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-06-05 13:59:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.56) internal successors, (256), 100 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2021-06-05 13:59:50,269 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 15 [2021-06-05 13:59:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:50,269 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2021-06-05 13:59:50,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2021-06-05 13:59:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:50,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:50,269 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:50,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 13:59:50,484 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash 690186194, now seen corresponding path program 41 times [2021-06-05 13:59:50,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:50,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452726422] [2021-06-05 13:59:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:50,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:50,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452726422] [2021-06-05 13:59:50,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452726422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520737276] [2021-06-05 13:59:50,506 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 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 13:59:50,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:59:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:50,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520737276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:50,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:50,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059985355] [2021-06-05 13:59:50,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:50,545 INFO L87 Difference]: Start difference. First operand 101 states and 256 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 13:59:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:50,585 INFO L93 Difference]: Finished difference Result 205 states and 458 transitions. [2021-06-05 13:59:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:50,585 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 13:59:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:50,585 INFO L225 Difference]: With dead ends: 205 [2021-06-05 13:59:50,585 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 13:59:50,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 13:59:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 119. [2021-06-05 13:59:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.73728813559322) internal successors, (323), 118 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 323 transitions. [2021-06-05 13:59:50,589 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 323 transitions. Word has length 15 [2021-06-05 13:59:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 323 transitions. [2021-06-05 13:59:50,589 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 13:59:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 323 transitions. [2021-06-05 13:59:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:50,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:50,589 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:50,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 13:59:50,805 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash -86963405, now seen corresponding path program 42 times [2021-06-05 13:59:50,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:50,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627601438] [2021-06-05 13:59:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:50,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627601438] [2021-06-05 13:59:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627601438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879718321] [2021-06-05 13:59:50,827 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 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 13:59:50,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:59:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:50,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:50,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879718321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:50,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725712546] [2021-06-05 13:59:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:50,865 INFO L87 Difference]: Start difference. First operand 119 states and 323 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 13:59:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:50,925 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2021-06-05 13:59:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:50,926 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 13:59:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:50,926 INFO L225 Difference]: With dead ends: 198 [2021-06-05 13:59:50,926 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 13:59:50,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:59:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 13:59:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-06-05 13:59:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.811023622047244) internal successors, (357), 127 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 357 transitions. [2021-06-05 13:59:50,929 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 357 transitions. Word has length 15 [2021-06-05 13:59:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:50,929 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 357 transitions. [2021-06-05 13:59:50,929 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 13:59:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 357 transitions. [2021-06-05 13:59:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:50,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:50,929 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:51,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 13:59:51,145 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1035293264, now seen corresponding path program 43 times [2021-06-05 13:59:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:51,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518935668] [2021-06-05 13:59:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:51,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518935668] [2021-06-05 13:59:51,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518935668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020417740] [2021-06-05 13:59:51,168 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 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 13:59:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020417740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:51,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:51,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450585584] [2021-06-05 13:59:51,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:51,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:51,217 INFO L87 Difference]: Start difference. First operand 128 states and 357 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 13:59:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:51,270 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-06-05 13:59:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:51,270 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 13:59:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:51,270 INFO L225 Difference]: With dead ends: 206 [2021-06-05 13:59:51,271 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 13:59:51,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:59:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 13:59:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2021-06-05 13:59:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8031496062992125) internal successors, (356), 127 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 356 transitions. [2021-06-05 13:59:51,273 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 356 transitions. Word has length 15 [2021-06-05 13:59:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:51,274 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 356 transitions. [2021-06-05 13:59:51,274 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 13:59:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 356 transitions. [2021-06-05 13:59:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:51,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:51,274 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:51,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:51,490 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:51,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1623649903, now seen corresponding path program 44 times [2021-06-05 13:59:51,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:51,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004665998] [2021-06-05 13:59:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:51,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004665998] [2021-06-05 13:59:51,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004665998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243976880] [2021-06-05 13:59:51,515 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 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 13:59:51,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:51,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243976880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:51,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:51,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99397840] [2021-06-05 13:59:51,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:51,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:51,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:51,557 INFO L87 Difference]: Start difference. First operand 128 states and 356 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 13:59:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:51,585 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2021-06-05 13:59:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:51,586 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 13:59:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:51,586 INFO L225 Difference]: With dead ends: 187 [2021-06-05 13:59:51,586 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 13:59:51,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 13:59:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-06-05 13:59:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.7890625) internal successors, (357), 128 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 357 transitions. [2021-06-05 13:59:51,589 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 357 transitions. Word has length 15 [2021-06-05 13:59:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:51,589 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 357 transitions. [2021-06-05 13:59:51,589 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 13:59:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 357 transitions. [2021-06-05 13:59:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:51,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:51,590 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:51,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 13:59:51,790 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:51,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash 454111732, now seen corresponding path program 45 times [2021-06-05 13:59:51,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:51,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819117986] [2021-06-05 13:59:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:51,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819117986] [2021-06-05 13:59:51,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819117986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715447442] [2021-06-05 13:59:51,811 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 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 13:59:51,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:51,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:51,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715447442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:51,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:51,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204389526] [2021-06-05 13:59:51,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:51,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:51,857 INFO L87 Difference]: Start difference. First operand 129 states and 357 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 13:59:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:51,903 INFO L93 Difference]: Finished difference Result 215 states and 521 transitions. [2021-06-05 13:59:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:51,903 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 13:59:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:51,904 INFO L225 Difference]: With dead ends: 215 [2021-06-05 13:59:51,904 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 13:59:51,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:59:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 13:59:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2021-06-05 13:59:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.78125) internal successors, (356), 128 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 356 transitions. [2021-06-05 13:59:51,914 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 356 transitions. Word has length 15 [2021-06-05 13:59:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:51,914 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 356 transitions. [2021-06-05 13:59:51,914 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 13:59:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 356 transitions. [2021-06-05 13:59:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:51,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:51,915 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:52,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 13:59:52,121 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash -437209899, now seen corresponding path program 46 times [2021-06-05 13:59:52,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:52,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469236147] [2021-06-05 13:59:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:52,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469236147] [2021-06-05 13:59:52,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469236147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128628223] [2021-06-05 13:59:52,145 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 13:59:52,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:52,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128628223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:52,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:59:52,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139435740] [2021-06-05 13:59:52,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:59:52,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:52,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:59:52,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:52,187 INFO L87 Difference]: Start difference. First operand 129 states and 356 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 13:59:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:52,219 INFO L93 Difference]: Finished difference Result 166 states and 422 transitions. [2021-06-05 13:59:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:52,219 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 13:59:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:52,220 INFO L225 Difference]: With dead ends: 166 [2021-06-05 13:59:52,220 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 13:59:52,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 13:59:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2021-06-05 13:59:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 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 13:59:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-06-05 13:59:52,222 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 15 [2021-06-05 13:59:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:52,222 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-06-05 13:59:52,222 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 13:59:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-06-05 13:59:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:52,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:52,223 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:52,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:52,438 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash -618973648, now seen corresponding path program 47 times [2021-06-05 13:59:52,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:52,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818096895] [2021-06-05 13:59:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818096895] [2021-06-05 13:59:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818096895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906935556] [2021-06-05 13:59:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:52,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906935556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:52,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:52,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014230389] [2021-06-05 13:59:52,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:52,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:52,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:52,521 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:52,575 INFO L93 Difference]: Finished difference Result 217 states and 530 transitions. [2021-06-05 13:59:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:52,576 INFO L225 Difference]: With dead ends: 217 [2021-06-05 13:59:52,576 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 13:59:52,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 13:59:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-06-05 13:59:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-06-05 13:59:52,580 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-06-05 13:59:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:52,580 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-06-05 13:59:52,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-06-05 13:59:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:52,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:52,580 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:52,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:52,793 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash 100645679, now seen corresponding path program 48 times [2021-06-05 13:59:52,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:52,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047107894] [2021-06-05 13:59:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:52,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047107894] [2021-06-05 13:59:52,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047107894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543746624] [2021-06-05 13:59:52,816 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:52,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:59:52,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:52,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:52,868 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 13:59:52,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543746624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:52,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109748426] [2021-06-05 13:59:52,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:52,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:52,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:52,869 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:52,928 INFO L93 Difference]: Finished difference Result 184 states and 467 transitions. [2021-06-05 13:59:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:59:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:52,929 INFO L225 Difference]: With dead ends: 184 [2021-06-05 13:59:52,929 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 13:59:52,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:59:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 13:59:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2021-06-05 13:59:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-06-05 13:59:52,936 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-06-05 13:59:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:52,936 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-06-05 13:59:52,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-06-05 13:59:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:52,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:52,936 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:53,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:53,152 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 475117940, now seen corresponding path program 49 times [2021-06-05 13:59:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:53,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094206197] [2021-06-05 13:59:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094206197] [2021-06-05 13:59:53,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094206197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648908372] [2021-06-05 13:59:53,175 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 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 13:59:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648908372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:53,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044152628] [2021-06-05 13:59:53,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:53,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:53,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:53,219 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:53,253 INFO L93 Difference]: Finished difference Result 186 states and 481 transitions. [2021-06-05 13:59:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:53,254 INFO L225 Difference]: With dead ends: 186 [2021-06-05 13:59:53,254 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 13:59:53,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 13:59:53,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-06-05 13:59:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.841726618705036) internal successors, (395), 139 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 395 transitions. [2021-06-05 13:59:53,257 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 395 transitions. Word has length 15 [2021-06-05 13:59:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:53,257 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 395 transitions. [2021-06-05 13:59:53,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 395 transitions. [2021-06-05 13:59:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:53,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:53,257 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:53,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 13:59:53,458 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash -405700587, now seen corresponding path program 50 times [2021-06-05 13:59:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:53,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565261690] [2021-06-05 13:59:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:53,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565261690] [2021-06-05 13:59:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565261690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241244548] [2021-06-05 13:59:53,481 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 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 13:59:53,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 13:59:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:53,523 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 13:59:53,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241244548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:53,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:59:53,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644182416] [2021-06-05 13:59:53,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:53,524 INFO L87 Difference]: Start difference. First operand 140 states and 395 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:53,590 INFO L93 Difference]: Finished difference Result 189 states and 494 transitions. [2021-06-05 13:59:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:59:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:53,591 INFO L225 Difference]: With dead ends: 189 [2021-06-05 13:59:53,591 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 13:59:53,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 13:59:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-06-05 13:59:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8299319727891157) internal successors, (416), 147 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 416 transitions. [2021-06-05 13:59:53,593 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 416 transitions. Word has length 15 [2021-06-05 13:59:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:53,593 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 416 transitions. [2021-06-05 13:59:53,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13:59:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 416 transitions. [2021-06-05 13:59:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:53,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:53,594 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:53,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:59:53,805 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1204336263, now seen corresponding path program 51 times [2021-06-05 13:59:53,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:53,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715341344] [2021-06-05 13:59:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:53,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715341344] [2021-06-05 13:59:53,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715341344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021891258] [2021-06-05 13:59:53,864 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 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 13:59:53,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:53,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:54,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:54,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:54,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:54,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:54,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021891258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:54,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 13:59:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346228267] [2021-06-05 13:59:54,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:59:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:59:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:59:54,066 INFO L87 Difference]: Start difference. First operand 148 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 13:59:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:54,229 INFO L93 Difference]: Finished difference Result 205 states and 527 transitions. [2021-06-05 13:59:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:54,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 13:59:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:54,230 INFO L225 Difference]: With dead ends: 205 [2021-06-05 13:59:54,230 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 13:59:54,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 13:59:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2021-06-05 13:59:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8343949044585988) internal successors, (445), 157 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 445 transitions. [2021-06-05 13:59:54,232 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 445 transitions. Word has length 16 [2021-06-05 13:59:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:54,232 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 445 transitions. [2021-06-05 13:59:54,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 13:59:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 445 transitions. [2021-06-05 13:59:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:54,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:54,233 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:54,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 13:59:54,445 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:54,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:54,445 INFO L82 PathProgramCache]: Analyzing trace with hash 387366859, now seen corresponding path program 52 times [2021-06-05 13:59:54,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:54,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735280432] [2021-06-05 13:59:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:54,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735280432] [2021-06-05 13:59:54,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735280432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903096479] [2021-06-05 13:59:54,498 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 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 13:59:54,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:54,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:54,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:54,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:54,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:54,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:54,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:54,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:54,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903096479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:54,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920423165] [2021-06-05 13:59:54,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:54,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:54,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:54,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:54,689 INFO L87 Difference]: Start difference. First operand 158 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:54,861 INFO L93 Difference]: Finished difference Result 218 states and 567 transitions. [2021-06-05 13:59:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:54,862 INFO L225 Difference]: With dead ends: 218 [2021-06-05 13:59:54,862 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 13:59:54,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 13:59:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 169. [2021-06-05 13:59:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-06-05 13:59:54,865 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-06-05 13:59:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:54,865 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-06-05 13:59:54,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-06-05 13:59:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:54,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:54,865 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:55,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 13:59:55,081 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1246241389, now seen corresponding path program 53 times [2021-06-05 13:59:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:55,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396617406] [2021-06-05 13:59:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:55,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:55,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396617406] [2021-06-05 13:59:55,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396617406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:55,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662397310] [2021-06-05 13:59:55,133 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:55,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:55,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 13:59:55,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:55,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:55,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:55,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:55,439 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:55,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:55,440 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 13:59:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:55,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662397310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:55,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:55,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:55,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442190799] [2021-06-05 13:59:55,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:55,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:55,461 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:55,616 INFO L93 Difference]: Finished difference Result 234 states and 603 transitions. [2021-06-05 13:59:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:59:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:55,617 INFO L225 Difference]: With dead ends: 234 [2021-06-05 13:59:55,617 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 13:59:55,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 13:59:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 169. [2021-06-05 13:59:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-06-05 13:59:55,620 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-06-05 13:59:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:55,620 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-06-05 13:59:55,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-06-05 13:59:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:55,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:55,621 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:55,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 13:59:55,835 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1054238309, now seen corresponding path program 54 times [2021-06-05 13:59:55,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:55,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464992328] [2021-06-05 13:59:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:55,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:55,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464992328] [2021-06-05 13:59:55,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464992328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:55,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553582254] [2021-06-05 13:59:55,885 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 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 13:59:55,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:59:55,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:56,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:56,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:56,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:56,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:56,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:56,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553582254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:56,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:56,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:56,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198776583] [2021-06-05 13:59:56,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:56,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:56,067 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:56,197 INFO L93 Difference]: Finished difference Result 232 states and 635 transitions. [2021-06-05 13:59:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:56,198 INFO L225 Difference]: With dead ends: 232 [2021-06-05 13:59:56,198 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:59:56,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:59:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 188. [2021-06-05 13:59:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9411764705882355) internal successors, (550), 187 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 550 transitions. [2021-06-05 13:59:56,201 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 550 transitions. Word has length 16 [2021-06-05 13:59:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:56,201 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 550 transitions. [2021-06-05 13:59:56,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 550 transitions. [2021-06-05 13:59:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:56,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:56,201 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:56,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 13:59:56,409 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -195363779, now seen corresponding path program 55 times [2021-06-05 13:59:56,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:56,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903286906] [2021-06-05 13:59:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:56,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:56,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903286906] [2021-06-05 13:59:56,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903286906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:56,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172060670] [2021-06-05 13:59:56,459 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 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 13:59:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:56,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:56,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 13:59:56,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:56,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:56,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:56,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:56,721 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:56,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:56,722 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 13:59:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:56,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172060670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:56,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:56,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:56,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342142906] [2021-06-05 13:59:56,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:56,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:56,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:56,743 INFO L87 Difference]: Start difference. First operand 188 states and 550 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:56,951 INFO L93 Difference]: Finished difference Result 263 states and 691 transitions. [2021-06-05 13:59:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:56,953 INFO L225 Difference]: With dead ends: 263 [2021-06-05 13:59:56,953 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 13:59:56,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 13:59:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-06-05 13:59:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.918918918918919) internal successors, (540), 185 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 540 transitions. [2021-06-05 13:59:56,956 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 540 transitions. Word has length 16 [2021-06-05 13:59:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:56,956 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 540 transitions. [2021-06-05 13:59:56,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 540 transitions. [2021-06-05 13:59:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:56,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:56,957 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:57,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:57,158 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1515249529, now seen corresponding path program 56 times [2021-06-05 13:59:57,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:57,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824753889] [2021-06-05 13:59:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:57,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:57,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824753889] [2021-06-05 13:59:57,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824753889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:57,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214221603] [2021-06-05 13:59:57,222 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 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 13:59:57,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:57,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:57,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:57,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 13:59:57,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:57,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:57,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,574 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:57,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:57,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 13:59:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:57,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214221603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:57,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:57,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:57,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597686432] [2021-06-05 13:59:57,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:57,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:57,596 INFO L87 Difference]: Start difference. First operand 186 states and 540 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:57,827 INFO L93 Difference]: Finished difference Result 229 states and 625 transitions. [2021-06-05 13:59:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:59:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:57,828 INFO L225 Difference]: With dead ends: 229 [2021-06-05 13:59:57,828 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 13:59:57,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 13:59:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-06-05 13:59:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9193548387096775) internal successors, (543), 186 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 13:59:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 543 transitions. [2021-06-05 13:59:57,831 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 543 transitions. Word has length 16 [2021-06-05 13:59:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:57,831 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 543 transitions. [2021-06-05 13:59:57,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 543 transitions. [2021-06-05 13:59:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:57,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:57,831 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:58,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 13:59:58,047 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:58,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1313032655, now seen corresponding path program 57 times [2021-06-05 13:59:58,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:58,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513405634] [2021-06-05 13:59:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:58,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:58,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513405634] [2021-06-05 13:59:58,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513405634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631001992] [2021-06-05 13:59:58,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:58,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:58,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:58,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:58,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:58,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:58,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:58,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631001992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:58,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 13:59:58,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221764958] [2021-06-05 13:59:58,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:59:58,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:59:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:58,265 INFO L87 Difference]: Start difference. First operand 187 states and 543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) 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 13:59:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:58,406 INFO L93 Difference]: Finished difference Result 208 states and 572 transitions. [2021-06-05 13:59:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:59:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 16 [2021-06-05 13:59:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:58,407 INFO L225 Difference]: With dead ends: 208 [2021-06-05 13:59:58,407 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 13:59:58,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 13:59:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-06-05 13:59:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-06-05 13:59:58,410 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 16 [2021-06-05 13:59:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:58,410 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-06-05 13:59:58,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) 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 13:59:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-06-05 13:59:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:58,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:58,411 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:58,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:58,627 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash -762693297, now seen corresponding path program 58 times [2021-06-05 13:59:58,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:58,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717968366] [2021-06-05 13:59:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:58,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717968366] [2021-06-05 13:59:58,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717968366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364119356] [2021-06-05 13:59:58,672 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 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 13:59:58,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:58,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:58,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 13:59:58,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:58,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:58,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:58,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:58,906 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:58,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:58,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 13:59:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364119356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:58,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:58,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384076816] [2021-06-05 13:59:58,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:58,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:58,927 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:59,152 INFO L93 Difference]: Finished difference Result 260 states and 675 transitions. [2021-06-05 13:59:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:59:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:59,153 INFO L225 Difference]: With dead ends: 260 [2021-06-05 13:59:59,153 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 13:59:59,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 13:59:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2021-06-05 13:59:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.8842105263157896) internal successors, (548), 190 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 548 transitions. [2021-06-05 13:59:59,156 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 548 transitions. Word has length 16 [2021-06-05 13:59:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:59,156 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 548 transitions. [2021-06-05 13:59:59,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 548 transitions. [2021-06-05 13:59:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:59,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:59,157 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:59,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:59,373 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1500641739, now seen corresponding path program 59 times [2021-06-05 13:59:59,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:59,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833373578] [2021-06-05 13:59:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:59,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833373578] [2021-06-05 13:59:59,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833373578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983667990] [2021-06-05 13:59:59,421 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 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 13:59:59,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:59:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 13:59:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:59,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:59,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:59,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:59,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:59,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:59,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983667990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:59,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 13:59:59,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284375738] [2021-06-05 13:59:59,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:59:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:59:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:59,626 INFO L87 Difference]: Start difference. First operand 191 states and 548 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 13:59:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:59,844 INFO L93 Difference]: Finished difference Result 264 states and 729 transitions. [2021-06-05 13:59:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 13:59:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:59,845 INFO L225 Difference]: With dead ends: 264 [2021-06-05 13:59:59,845 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 13:59:59,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 13:59:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 216. [2021-06-05 13:59:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9488372093023254) internal successors, (634), 215 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 634 transitions. [2021-06-05 13:59:59,849 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 634 transitions. Word has length 16 [2021-06-05 13:59:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:59,849 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 634 transitions. [2021-06-05 13:59:59,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 13:59:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 634 transitions. [2021-06-05 13:59:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:59:59,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:59,849 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:00,061 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1935451027, now seen corresponding path program 60 times [2021-06-05 14:00:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702830611] [2021-06-05 14:00:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:00,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702830611] [2021-06-05 14:00:00,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702830611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875445928] [2021-06-05 14:00:00,109 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 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 14:00:00,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:00,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:00,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:00,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:00,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:00,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:00,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:00,360 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:00,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:00,361 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875445928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:00,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:00,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853454624] [2021-06-05 14:00:00,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:00,382 INFO L87 Difference]: Start difference. First operand 216 states and 634 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:00,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:00,739 INFO L93 Difference]: Finished difference Result 318 states and 837 transitions. [2021-06-05 14:00:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:00,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:00,741 INFO L225 Difference]: With dead ends: 318 [2021-06-05 14:00:00,741 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 14:00:00,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 14:00:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2021-06-05 14:00:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.944700460829493) internal successors, (639), 217 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 639 transitions. [2021-06-05 14:00:00,744 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 639 transitions. Word has length 16 [2021-06-05 14:00:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:00,744 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 639 transitions. [2021-06-05 14:00:00,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 639 transitions. [2021-06-05 14:00:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:00,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:00,744 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 14:00:00,953 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -224837719, now seen corresponding path program 61 times [2021-06-05 14:00:00,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388745651] [2021-06-05 14:00:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388745651] [2021-06-05 14:00:01,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388745651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255213788] [2021-06-05 14:00:01,011 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:00:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:01,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:01,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:01,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:01,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:01,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:01,285 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:01,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:01,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255213788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:01,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:01,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341635360] [2021-06-05 14:00:01,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:01,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:01,305 INFO L87 Difference]: Start difference. First operand 218 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:01,674 INFO L93 Difference]: Finished difference Result 355 states and 911 transitions. [2021-06-05 14:00:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:01,676 INFO L225 Difference]: With dead ends: 355 [2021-06-05 14:00:01,676 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 14:00:01,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:00:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 14:00:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 210. [2021-06-05 14:00:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.909090909090909) internal successors, (608), 209 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 608 transitions. [2021-06-05 14:00:01,679 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 608 transitions. Word has length 16 [2021-06-05 14:00:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:01,679 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 608 transitions. [2021-06-05 14:00:01,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 608 transitions. [2021-06-05 14:00:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:01,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:01,680 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:01,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 14:00:01,880 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1264567277, now seen corresponding path program 62 times [2021-06-05 14:00:01,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:01,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198161424] [2021-06-05 14:00:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198161424] [2021-06-05 14:00:01,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198161424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621531040] [2021-06-05 14:00:01,936 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 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 14:00:01,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:01,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:02,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:02,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:02,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:02,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:02,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:02,251 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:02,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:02,252 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621531040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:02,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93876104] [2021-06-05 14:00:02,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:02,275 INFO L87 Difference]: Start difference. First operand 210 states and 608 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:02,561 INFO L93 Difference]: Finished difference Result 275 states and 745 transitions. [2021-06-05 14:00:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:02,562 INFO L225 Difference]: With dead ends: 275 [2021-06-05 14:00:02,562 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 14:00:02,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 14:00:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2021-06-05 14:00:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9095238095238094) internal successors, (611), 210 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 611 transitions. [2021-06-05 14:00:02,566 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 611 transitions. Word has length 16 [2021-06-05 14:00:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:02,566 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 611 transitions. [2021-06-05 14:00:02,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 611 transitions. [2021-06-05 14:00:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:02,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:02,566 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:02,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 14:00:02,784 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:02,784 INFO L82 PathProgramCache]: Analyzing trace with hash -583718215, now seen corresponding path program 63 times [2021-06-05 14:00:02,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:02,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650317867] [2021-06-05 14:00:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:02,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650317867] [2021-06-05 14:00:02,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650317867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992291208] [2021-06-05 14:00:02,841 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 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 14:00:02,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:02,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:02,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:02,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:03,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:03,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:03,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:03,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:03,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:03,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992291208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:03,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:03,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815469051] [2021-06-05 14:00:03,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:03,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:03,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:03,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:03,027 INFO L87 Difference]: Start difference. First operand 211 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:03,175 INFO L93 Difference]: Finished difference Result 238 states and 653 transitions. [2021-06-05 14:00:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:03,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:03,176 INFO L225 Difference]: With dead ends: 238 [2021-06-05 14:00:03,177 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:00:03,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:00:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2021-06-05 14:00:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-06-05 14:00:03,179 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 16 [2021-06-05 14:00:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:03,180 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-06-05 14:00:03,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-06-05 14:00:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:03,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:03,180 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:03,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:03,385 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:03,386 INFO L82 PathProgramCache]: Analyzing trace with hash -632183593, now seen corresponding path program 64 times [2021-06-05 14:00:03,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:03,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168982353] [2021-06-05 14:00:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:03,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:03,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168982353] [2021-06-05 14:00:03,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168982353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708987387] [2021-06-05 14:00:03,446 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 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 14:00:03,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:03,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:03,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:03,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:03,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:03,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:03,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:03,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:03,702 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:03,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:03,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708987387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:03,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:03,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840255079] [2021-06-05 14:00:03,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:03,723 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:04,068 INFO L93 Difference]: Finished difference Result 298 states and 793 transitions. [2021-06-05 14:00:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:04,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:04,070 INFO L225 Difference]: With dead ends: 298 [2021-06-05 14:00:04,070 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 14:00:04,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:00:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 14:00:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 213. [2021-06-05 14:00:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.910377358490566) internal successors, (617), 212 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 617 transitions. [2021-06-05 14:00:04,073 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 617 transitions. Word has length 16 [2021-06-05 14:00:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:04,073 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 617 transitions. [2021-06-05 14:00:04,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 617 transitions. [2021-06-05 14:00:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:04,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:04,074 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:04,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 14:00:04,285 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash -902455397, now seen corresponding path program 65 times [2021-06-05 14:00:04,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:04,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443297560] [2021-06-05 14:00:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:04,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443297560] [2021-06-05 14:00:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443297560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504714120] [2021-06-05 14:00:04,337 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 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 14:00:04,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:04,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:04,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:04,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:04,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:04,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:04,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504714120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:04,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:04,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533173370] [2021-06-05 14:00:04,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:04,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:04,528 INFO L87 Difference]: Start difference. First operand 213 states and 617 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:04,715 INFO L93 Difference]: Finished difference Result 275 states and 774 transitions. [2021-06-05 14:00:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:04,717 INFO L225 Difference]: With dead ends: 275 [2021-06-05 14:00:04,717 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 14:00:04,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 14:00:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2021-06-05 14:00:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.9625) internal successors, (711), 240 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 711 transitions. [2021-06-05 14:00:04,720 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 711 transitions. Word has length 16 [2021-06-05 14:00:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:04,720 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 711 transitions. [2021-06-05 14:00:04,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 711 transitions. [2021-06-05 14:00:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:04,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:04,721 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:04,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:04,921 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -43580867, now seen corresponding path program 66 times [2021-06-05 14:00:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:04,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993758823] [2021-06-05 14:00:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:04,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993758823] [2021-06-05 14:00:04,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993758823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121026472] [2021-06-05 14:00:04,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:04,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:04,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:04,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:05,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:05,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:05,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:05,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:05,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:05,220 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:05,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:05,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:05,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121026472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:05,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:05,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:05,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558594948] [2021-06-05 14:00:05,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:05,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:05,250 INFO L87 Difference]: Start difference. First operand 241 states and 711 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:05,732 INFO L93 Difference]: Finished difference Result 332 states and 894 transitions. [2021-06-05 14:00:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:00:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:05,733 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:00:05,733 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 14:00:05,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:00:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 14:00:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2021-06-05 14:00:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9669421487603307) internal successors, (718), 242 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 718 transitions. [2021-06-05 14:00:05,741 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 718 transitions. Word has length 16 [2021-06-05 14:00:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:05,741 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 718 transitions. [2021-06-05 14:00:05,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 718 transitions. [2021-06-05 14:00:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:05,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:05,741 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:05,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 14:00:05,949 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:05,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1667032441, now seen corresponding path program 67 times [2021-06-05 14:00:05,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:05,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129430082] [2021-06-05 14:00:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:06,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129430082] [2021-06-05 14:00:06,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129430082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629277017] [2021-06-05 14:00:06,002 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 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 14:00:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:06,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:06,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:06,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:06,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:06,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:06,300 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:06,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:06,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629277017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:06,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225045193] [2021-06-05 14:00:06,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:06,325 INFO L87 Difference]: Start difference. First operand 243 states and 718 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:06,689 INFO L93 Difference]: Finished difference Result 325 states and 881 transitions. [2021-06-05 14:00:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:06,690 INFO L225 Difference]: With dead ends: 325 [2021-06-05 14:00:06,690 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 14:00:06,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:00:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 14:00:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2021-06-05 14:00:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9763779527559056) internal successors, (756), 254 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 756 transitions. [2021-06-05 14:00:06,694 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 756 transitions. Word has length 16 [2021-06-05 14:00:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:06,694 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 756 transitions. [2021-06-05 14:00:06,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 756 transitions. [2021-06-05 14:00:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:06,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:06,695 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:06,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 14:00:06,895 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1138529859, now seen corresponding path program 68 times [2021-06-05 14:00:06,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:06,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125621520] [2021-06-05 14:00:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:06,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125621520] [2021-06-05 14:00:06,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125621520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346058010] [2021-06-05 14:00:06,959 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 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 14:00:06,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:06,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:06,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:07,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:07,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:07,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:07,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:07,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:07,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:07,245 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:07,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:07,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:07,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346058010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:07,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:07,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868418811] [2021-06-05 14:00:07,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:07,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:07,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:07,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:07,272 INFO L87 Difference]: Start difference. First operand 255 states and 756 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:07,703 INFO L93 Difference]: Finished difference Result 360 states and 966 transitions. [2021-06-05 14:00:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:00:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:07,705 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:00:07,705 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 14:00:07,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:00:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 14:00:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 249. [2021-06-05 14:00:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.967741935483871) internal successors, (736), 248 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 736 transitions. [2021-06-05 14:00:07,709 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 736 transitions. Word has length 16 [2021-06-05 14:00:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:07,709 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 736 transitions. [2021-06-05 14:00:07,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 736 transitions. [2021-06-05 14:00:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:07,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:07,709 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:07,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:07,925 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2083352057, now seen corresponding path program 69 times [2021-06-05 14:00:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:07,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972872749] [2021-06-05 14:00:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:07,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:07,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972872749] [2021-06-05 14:00:07,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972872749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252049542] [2021-06-05 14:00:07,983 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 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 14:00:08,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:08,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:08,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:08,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:08,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:08,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:08,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:08,251 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:08,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:08,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252049542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:08,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349913484] [2021-06-05 14:00:08,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:08,274 INFO L87 Difference]: Start difference. First operand 249 states and 736 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:08,576 INFO L93 Difference]: Finished difference Result 305 states and 859 transitions. [2021-06-05 14:00:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:08,577 INFO L225 Difference]: With dead ends: 305 [2021-06-05 14:00:08,577 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 14:00:08,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:00:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 14:00:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2021-06-05 14:00:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.967871485943775) internal successors, (739), 249 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 739 transitions. [2021-06-05 14:00:08,581 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 739 transitions. Word has length 16 [2021-06-05 14:00:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:08,581 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 739 transitions. [2021-06-05 14:00:08,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 739 transitions. [2021-06-05 14:00:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:08,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:08,581 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:08,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:08,793 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash 746546959, now seen corresponding path program 70 times [2021-06-05 14:00:08,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:08,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46757964] [2021-06-05 14:00:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46757964] [2021-06-05 14:00:08,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46757964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116404533] [2021-06-05 14:00:08,849 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 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 14:00:08,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:08,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:08,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:09,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:09,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:09,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:09,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:09,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:09,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:09,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116404533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:09,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:09,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553011100] [2021-06-05 14:00:09,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:09,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:09,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:09,052 INFO L87 Difference]: Start difference. First operand 250 states and 739 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:09,259 INFO L93 Difference]: Finished difference Result 285 states and 797 transitions. [2021-06-05 14:00:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:09,260 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:00:09,260 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 14:00:09,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 14:00:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 250. [2021-06-05 14:00:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-06-05 14:00:09,264 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-06-05 14:00:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:09,264 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-06-05 14:00:09,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-06-05 14:00:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:09,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:09,264 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:09,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 14:00:09,476 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -881350065, now seen corresponding path program 71 times [2021-06-05 14:00:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:09,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065644857] [2021-06-05 14:00:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:09,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:09,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065644857] [2021-06-05 14:00:09,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065644857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:09,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127793129] [2021-06-05 14:00:09,538 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 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 14:00:09,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:09,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:09,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:09,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:09,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:09,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:09,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:09,797 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:09,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:09,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:09,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127793129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:09,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:09,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334055071] [2021-06-05 14:00:09,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:09,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:09,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:09,820 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:10,237 INFO L93 Difference]: Finished difference Result 335 states and 919 transitions. [2021-06-05 14:00:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:10,238 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:00:10,238 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 14:00:10,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:00:10,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 14:00:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2021-06-05 14:00:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-06-05 14:00:10,242 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-06-05 14:00:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:10,242 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-06-05 14:00:10,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-06-05 14:00:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:10,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:10,242 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:10,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:10,443 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:10,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1910944715, now seen corresponding path program 72 times [2021-06-05 14:00:10,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:10,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946651794] [2021-06-05 14:00:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:10,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:10,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946651794] [2021-06-05 14:00:10,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946651794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643113320] [2021-06-05 14:00:10,492 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 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 14:00:10,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:10,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:10,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:10,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:10,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:10,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:10,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:10,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643113320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:10,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:10,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307444885] [2021-06-05 14:00:10,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:10,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:10,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:10,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:10,676 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:10,850 INFO L93 Difference]: Finished difference Result 306 states and 878 transitions. [2021-06-05 14:00:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:10,852 INFO L225 Difference]: With dead ends: 306 [2021-06-05 14:00:10,852 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 14:00:10,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 14:00:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 277. [2021-06-05 14:00:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0) internal successors, (828), 276 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 828 transitions. [2021-06-05 14:00:10,855 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 828 transitions. Word has length 16 [2021-06-05 14:00:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:10,856 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 828 transitions. [2021-06-05 14:00:10,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 828 transitions. [2021-06-05 14:00:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:10,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:10,856 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:11,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable742,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:11,065 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1525148051, now seen corresponding path program 73 times [2021-06-05 14:00:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:11,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966487617] [2021-06-05 14:00:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:11,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966487617] [2021-06-05 14:00:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966487617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549468174] [2021-06-05 14:00:11,118 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 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 14:00:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:11,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:11,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:11,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:11,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:11,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:11,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:11,387 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:11,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:11,387 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549468174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:11,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:11,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783641321] [2021-06-05 14:00:11,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:11,407 INFO L87 Difference]: Start difference. First operand 277 states and 828 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:11,888 INFO L93 Difference]: Finished difference Result 356 states and 998 transitions. [2021-06-05 14:00:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:00:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:11,890 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:00:11,890 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 14:00:11,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:00:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 14:00:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 279. [2021-06-05 14:00:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0071942446043165) internal successors, (836), 278 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 836 transitions. [2021-06-05 14:00:11,894 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 836 transitions. Word has length 16 [2021-06-05 14:00:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:11,894 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 836 transitions. [2021-06-05 14:00:11,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 836 transitions. [2021-06-05 14:00:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:11,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:11,895 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:12,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 14:00:12,098 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:12,098 INFO L82 PathProgramCache]: Analyzing trace with hash 185465257, now seen corresponding path program 74 times [2021-06-05 14:00:12,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:12,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663190581] [2021-06-05 14:00:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663190581] [2021-06-05 14:00:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663190581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490146915] [2021-06-05 14:00:12,156 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 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 14:00:12,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:12,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:12,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:12,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:12,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:12,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:12,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:12,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:12,474 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:12,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:12,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:12,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490146915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:12,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:12,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:12,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182767072] [2021-06-05 14:00:12,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:12,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:12,494 INFO L87 Difference]: Start difference. First operand 279 states and 836 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:12,850 INFO L93 Difference]: Finished difference Result 370 states and 1018 transitions. [2021-06-05 14:00:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:00:12,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:12,851 INFO L225 Difference]: With dead ends: 370 [2021-06-05 14:00:12,851 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:00:12,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:00:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:00:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 293. [2021-06-05 14:00:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0205479452054793) internal successors, (882), 292 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 882 transitions. [2021-06-05 14:00:12,855 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 882 transitions. Word has length 16 [2021-06-05 14:00:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:12,855 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 882 transitions. [2021-06-05 14:00:12,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 882 transitions. [2021-06-05 14:00:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:12,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:12,857 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:13,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 14:00:13,061 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1674870253, now seen corresponding path program 75 times [2021-06-05 14:00:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:13,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62764921] [2021-06-05 14:00:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:13,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62764921] [2021-06-05 14:00:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62764921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:13,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261872468] [2021-06-05 14:00:13,112 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 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 14:00:13,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:13,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:13,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:13,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:13,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:13,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:13,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:13,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:13,385 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:13,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:13,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:13,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261872468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:13,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:13,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:13,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470664353] [2021-06-05 14:00:13,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:13,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:13,405 INFO L87 Difference]: Start difference. First operand 293 states and 882 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 14:00:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:13,764 INFO L93 Difference]: Finished difference Result 377 states and 1037 transitions. [2021-06-05 14:00:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-06-05 14:00:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:13,765 INFO L225 Difference]: With dead ends: 377 [2021-06-05 14:00:13,765 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 14:00:13,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:00:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 14:00:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 298. [2021-06-05 14:00:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0134680134680134) internal successors, (895), 297 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 14:00:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 895 transitions. [2021-06-05 14:00:13,769 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 895 transitions. Word has length 16 [2021-06-05 14:00:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:13,769 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 895 transitions. [2021-06-05 14:00:13,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 14:00:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 895 transitions. [2021-06-05 14:00:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:13,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:13,770 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:13,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:13,970 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 601784873, now seen corresponding path program 76 times [2021-06-05 14:00:13,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:13,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325394960] [2021-06-05 14:00:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325394960] [2021-06-05 14:00:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325394960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607654924] [2021-06-05 14:00:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:00:14,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:14,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:14,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:14,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:14,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:14,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:14,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:14,289 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:14,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:14,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607654924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:14,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:14,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032025050] [2021-06-05 14:00:14,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:14,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:14,314 INFO L87 Difference]: Start difference. First operand 298 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:14,776 INFO L93 Difference]: Finished difference Result 410 states and 1106 transitions. [2021-06-05 14:00:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:14,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:14,778 INFO L225 Difference]: With dead ends: 410 [2021-06-05 14:00:14,778 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 14:00:14,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:00:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 14:00:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 297. [2021-06-05 14:00:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.027027027027027) internal successors, (896), 296 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 896 transitions. [2021-06-05 14:00:14,782 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 896 transitions. Word has length 16 [2021-06-05 14:00:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:14,782 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 896 transitions. [2021-06-05 14:00:14,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 896 transitions. [2021-06-05 14:00:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:14,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:14,782 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:14,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-05 14:00:14,997 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1695876461, now seen corresponding path program 77 times [2021-06-05 14:00:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458603664] [2021-06-05 14:00:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:15,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458603664] [2021-06-05 14:00:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458603664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687825810] [2021-06-05 14:00:15,050 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 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 14:00:15,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:15,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:00:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:15,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:15,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:15,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:15,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:15,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:15,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:15,334 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 14:00:15,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:15,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-06-05 14:00:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:15,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687825810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:15,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:15,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:15,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903299742] [2021-06-05 14:00:15,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:15,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:15,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:15,359 INFO L87 Difference]: Start difference. First operand 297 states and 896 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:15,713 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-06-05 14:00:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 16 [2021-06-05 14:00:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:15,715 INFO L225 Difference]: With dead ends: 367 [2021-06-05 14:00:15,715 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 14:00:15,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:00:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 14:00:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 299. [2021-06-05 14:00:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0167785234899327) internal successors, (899), 298 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 899 transitions. [2021-06-05 14:00:15,719 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 899 transitions. Word has length 16 [2021-06-05 14:00:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:15,719 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 899 transitions. [2021-06-05 14:00:15,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 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 14:00:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 899 transitions. [2021-06-05 14:00:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:15,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:15,719 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:15,920 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 576133811, now seen corresponding path program 78 times [2021-06-05 14:00:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135112334] [2021-06-05 14:00:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:15,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:15,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135112334] [2021-06-05 14:00:15,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135112334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:15,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874527867] [2021-06-05 14:00:15,982 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 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 14:00:16,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:16,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:16,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:16,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:16,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:16,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:16,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:16,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874527867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:16,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:16,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123075906] [2021-06-05 14:00:16,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:16,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:16,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:16,238 INFO L87 Difference]: Start difference. First operand 299 states and 899 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 14:00:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:16,530 INFO L93 Difference]: Finished difference Result 348 states and 996 transitions. [2021-06-05 14:00:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 17 [2021-06-05 14:00:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:16,532 INFO L225 Difference]: With dead ends: 348 [2021-06-05 14:00:16,532 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:00:16,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:00:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:00:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-06-05 14:00:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-06-05 14:00:16,536 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 17 [2021-06-05 14:00:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:16,536 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-06-05 14:00:16,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 14:00:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-06-05 14:00:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:16,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:16,537 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:16,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:16,737 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 726231765, now seen corresponding path program 79 times [2021-06-05 14:00:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:16,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222902731] [2021-06-05 14:00:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:16,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:16,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222902731] [2021-06-05 14:00:16,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222902731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663817667] [2021-06-05 14:00:16,789 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 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 14:00:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:16,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:16,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:17,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:17,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:17,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:17,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663817667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:17,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:17,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13893897] [2021-06-05 14:00:17,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:17,017 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:17,184 INFO L93 Difference]: Finished difference Result 394 states and 1062 transitions. [2021-06-05 14:00:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:17,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 17 [2021-06-05 14:00:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:17,186 INFO L225 Difference]: With dead ends: 394 [2021-06-05 14:00:17,186 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 14:00:17,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 14:00:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 306. [2021-06-05 14:00:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-06-05 14:00:17,190 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-06-05 14:00:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:17,190 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-06-05 14:00:17,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:17,190 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-06-05 14:00:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:17,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:17,190 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:17,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:17,391 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:17,391 INFO L82 PathProgramCache]: Analyzing trace with hash -999247693, now seen corresponding path program 80 times [2021-06-05 14:00:17,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:17,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177437562] [2021-06-05 14:00:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177437562] [2021-06-05 14:00:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177437562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680200660] [2021-06-05 14:00:17,451 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 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 14:00:17,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:17,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:17,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:17,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:17,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:17,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:17,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:17,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:17,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:17,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680200660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:17,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:17,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949588297] [2021-06-05 14:00:17,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:17,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:17,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:17,693 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:17,938 INFO L93 Difference]: Finished difference Result 393 states and 1076 transitions. [2021-06-05 14:00:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:00:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:17,940 INFO L225 Difference]: With dead ends: 393 [2021-06-05 14:00:17,940 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 14:00:17,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 14:00:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 306. [2021-06-05 14:00:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-06-05 14:00:17,946 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-06-05 14:00:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:17,946 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-06-05 14:00:17,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-06-05 14:00:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:17,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:17,947 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:18,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 14:00:18,161 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:18,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1659695474, now seen corresponding path program 81 times [2021-06-05 14:00:18,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:18,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817887177] [2021-06-05 14:00:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:18,191 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 14:00:18,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:18,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817887177] [2021-06-05 14:00:18,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817887177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874491858] [2021-06-05 14:00:18,192 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 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 14:00:18,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:18,255 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 14:00:18,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874491858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:18,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:18,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967989382] [2021-06-05 14:00:18,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:18,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:18,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:18,256 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:18,290 INFO L93 Difference]: Finished difference Result 469 states and 1200 transitions. [2021-06-05 14:00:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:18,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2021-06-05 14:00:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:18,292 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:00:18,292 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:00:18,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:18,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:00:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 312. [2021-06-05 14:00:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0160771704180065) internal successors, (938), 311 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 938 transitions. [2021-06-05 14:00:18,296 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 938 transitions. Word has length 17 [2021-06-05 14:00:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:18,296 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 938 transitions. [2021-06-05 14:00:18,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 938 transitions. [2021-06-05 14:00:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:18,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:18,297 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:18,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:18,497 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1013855483, now seen corresponding path program 82 times [2021-06-05 14:00:18,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:18,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868246323] [2021-06-05 14:00:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:18,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868246323] [2021-06-05 14:00:18,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868246323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52736863] [2021-06-05 14:00:18,548 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 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 14:00:18,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:18,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:18,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:18,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:18,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:18,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:18,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52736863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:18,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:18,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542536205] [2021-06-05 14:00:18,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:18,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:18,776 INFO L87 Difference]: Start difference. First operand 312 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:18,979 INFO L93 Difference]: Finished difference Result 389 states and 1080 transitions. [2021-06-05 14:00:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:18,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 17 [2021-06-05 14:00:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:18,981 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:00:18,981 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:00:18,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:00:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-06-05 14:00:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.022364217252396) internal successors, (946), 313 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 946 transitions. [2021-06-05 14:00:18,986 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 946 transitions. Word has length 17 [2021-06-05 14:00:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:18,986 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 946 transitions. [2021-06-05 14:00:18,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 946 transitions. [2021-06-05 14:00:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:18,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:18,986 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:19,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:19,187 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1555632355, now seen corresponding path program 83 times [2021-06-05 14:00:19,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:19,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273922129] [2021-06-05 14:00:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:19,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273922129] [2021-06-05 14:00:19,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273922129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806978213] [2021-06-05 14:00:19,245 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 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 14:00:19,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:19,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:19,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:19,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:19,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:19,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:19,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:19,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:19,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:19,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806978213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:19,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:19,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:19,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619283260] [2021-06-05 14:00:19,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:19,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:19,478 INFO L87 Difference]: Start difference. First operand 314 states and 946 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:19,734 INFO L93 Difference]: Finished difference Result 398 states and 1096 transitions. [2021-06-05 14:00:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:19,735 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:00:19,735 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:00:19,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:00:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 316. [2021-06-05 14:00:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-06-05 14:00:19,739 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-06-05 14:00:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:19,739 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-06-05 14:00:19,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-06-05 14:00:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:19,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:19,740 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:19,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-05 14:00:19,947 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1249929945, now seen corresponding path program 84 times [2021-06-05 14:00:19,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:19,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520255190] [2021-06-05 14:00:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:20,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520255190] [2021-06-05 14:00:20,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520255190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979294179] [2021-06-05 14:00:20,025 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 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 14:00:20,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:00:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:20,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:20,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:20,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:20,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:20,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:20,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979294179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:20,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:20,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636785815] [2021-06-05 14:00:20,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:20,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:20,267 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:20,426 INFO L93 Difference]: Finished difference Result 377 states and 1066 transitions. [2021-06-05 14:00:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:20,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:20,428 INFO L225 Difference]: With dead ends: 377 [2021-06-05 14:00:20,428 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 14:00:20,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 14:00:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 316. [2021-06-05 14:00:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-06-05 14:00:20,432 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-06-05 14:00:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:20,433 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-06-05 14:00:20,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-06-05 14:00:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:20,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:20,433 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:20,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:20,649 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2141251576, now seen corresponding path program 85 times [2021-06-05 14:00:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:20,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087323185] [2021-06-05 14:00:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:20,676 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 14:00:20,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087323185] [2021-06-05 14:00:20,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087323185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312957280] [2021-06-05 14:00:20,676 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 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 14:00:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:20,727 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 14:00:20,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312957280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:20,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:20,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342048037] [2021-06-05 14:00:20,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:20,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:20,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:20,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:20,727 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:20,782 INFO L93 Difference]: Finished difference Result 509 states and 1289 transitions. [2021-06-05 14:00:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 14:00:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:20,784 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:00:20,784 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 14:00:20,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 14:00:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 312. [2021-06-05 14:00:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-06-05 14:00:20,789 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 17 [2021-06-05 14:00:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:20,789 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-06-05 14:00:20,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-06-05 14:00:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:20,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:20,789 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:20,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1126,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:20,990 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:20,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1196751859, now seen corresponding path program 86 times [2021-06-05 14:00:20,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:20,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7600623] [2021-06-05 14:00:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:21,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:21,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7600623] [2021-06-05 14:00:21,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7600623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481473878] [2021-06-05 14:00:21,031 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 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 14:00:21,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:21,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:21,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:21,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:21,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:21,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:21,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:21,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:21,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481473878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:21,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 14:00:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888123956] [2021-06-05 14:00:21,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:21,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:21,276 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 14:00:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:21,443 INFO L93 Difference]: Finished difference Result 345 states and 992 transitions. [2021-06-05 14:00:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 17 [2021-06-05 14:00:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:21,445 INFO L225 Difference]: With dead ends: 345 [2021-06-05 14:00:21,445 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:00:21,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:00:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 313. [2021-06-05 14:00:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0096153846153846) internal successors, (939), 312 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 939 transitions. [2021-06-05 14:00:21,448 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 939 transitions. Word has length 17 [2021-06-05 14:00:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:21,448 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 939 transitions. [2021-06-05 14:00:21,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 14:00:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 939 transitions. [2021-06-05 14:00:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:21,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:21,449 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:21,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1127 [2021-06-05 14:00:21,653 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:21,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1148286481, now seen corresponding path program 87 times [2021-06-05 14:00:21,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:21,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797734655] [2021-06-05 14:00:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797734655] [2021-06-05 14:00:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797734655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218789266] [2021-06-05 14:00:21,701 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 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 14:00:21,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:21,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:21,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:21,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:21,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:21,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:21,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:21,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:21,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218789266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:21,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:21,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531209665] [2021-06-05 14:00:21,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:21,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:21,897 INFO L87 Difference]: Start difference. First operand 313 states and 939 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:22,116 INFO L93 Difference]: Finished difference Result 386 states and 1054 transitions. [2021-06-05 14:00:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:00:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:22,117 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:00:22,117 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 14:00:22,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 14:00:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 313. [2021-06-05 14:00:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-06-05 14:00:22,121 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 17 [2021-06-05 14:00:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:22,121 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-06-05 14:00:22,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-06-05 14:00:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:22,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:22,122 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:22,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-06-05 14:00:22,333 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 878014677, now seen corresponding path program 88 times [2021-06-05 14:00:22,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:22,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173001157] [2021-06-05 14:00:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173001157] [2021-06-05 14:00:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173001157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983514255] [2021-06-05 14:00:22,388 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 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 14:00:22,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:22,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:22,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:22,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:22,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:22,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:22,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:22,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:22,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983514255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:22,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:22,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788578034] [2021-06-05 14:00:22,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:22,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:22,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:22,600 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:22,788 INFO L93 Difference]: Finished difference Result 367 states and 1032 transitions. [2021-06-05 14:00:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:22,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 17 [2021-06-05 14:00:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:22,789 INFO L225 Difference]: With dead ends: 367 [2021-06-05 14:00:22,789 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:00:22,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:00:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2021-06-05 14:00:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.987138263665595) internal successors, (929), 311 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 929 transitions. [2021-06-05 14:00:22,793 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 929 transitions. Word has length 17 [2021-06-05 14:00:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:22,793 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 929 transitions. [2021-06-05 14:00:22,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 929 transitions. [2021-06-05 14:00:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:22,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:22,794 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:22,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-06-05 14:00:22,998 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:22,999 INFO L82 PathProgramCache]: Analyzing trace with hash -847464781, now seen corresponding path program 89 times [2021-06-05 14:00:22,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:22,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972345962] [2021-06-05 14:00:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:23,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:23,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972345962] [2021-06-05 14:00:23,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972345962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757437790] [2021-06-05 14:00:23,055 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 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 14:00:23,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:23,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:23,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:23,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:23,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:23,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:23,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757437790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:23,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501112160] [2021-06-05 14:00:23,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:23,265 INFO L87 Difference]: Start difference. First operand 312 states and 929 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:23,458 INFO L93 Difference]: Finished difference Result 358 states and 1007 transitions. [2021-06-05 14:00:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:23,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:23,459 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:00:23,459 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 14:00:23,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 14:00:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 310. [2021-06-05 14:00:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9967637540453076) internal successors, (926), 309 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 926 transitions. [2021-06-05 14:00:23,463 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 926 transitions. Word has length 17 [2021-06-05 14:00:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:23,463 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 926 transitions. [2021-06-05 14:00:23,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 926 transitions. [2021-06-05 14:00:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:23,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:23,464 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:23,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1193 [2021-06-05 14:00:23,665 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 641940215, now seen corresponding path program 90 times [2021-06-05 14:00:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:23,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678794801] [2021-06-05 14:00:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:23,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:23,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678794801] [2021-06-05 14:00:23,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678794801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559243072] [2021-06-05 14:00:23,732 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 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 14:00:23,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:23,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:23,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:23,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:23,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:23,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:23,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:23,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559243072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:23,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:23,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970768773] [2021-06-05 14:00:23,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:23,961 INFO L87 Difference]: Start difference. First operand 310 states and 926 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:24,218 INFO L93 Difference]: Finished difference Result 390 states and 1052 transitions. [2021-06-05 14:00:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:24,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:24,219 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:00:24,219 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:00:24,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:00:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 308. [2021-06-05 14:00:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.96742671009772) internal successors, (911), 307 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 911 transitions. [2021-06-05 14:00:24,223 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 911 transitions. Word has length 17 [2021-06-05 14:00:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:24,223 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 911 transitions. [2021-06-05 14:00:24,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 911 transitions. [2021-06-05 14:00:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:24,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:24,223 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:24,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1218,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:24,424 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -249381416, now seen corresponding path program 91 times [2021-06-05 14:00:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:24,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775961022] [2021-06-05 14:00:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:24,484 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 14:00:24,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775961022] [2021-06-05 14:00:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775961022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559685503] [2021-06-05 14:00:24,484 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:24,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:24,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:24,532 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 14:00:24,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559685503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:24,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:24,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472063547] [2021-06-05 14:00:24,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:24,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:24,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:24,532 INFO L87 Difference]: Start difference. First operand 308 states and 911 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:24,592 INFO L93 Difference]: Finished difference Result 461 states and 1184 transitions. [2021-06-05 14:00:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 14:00:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:24,593 INFO L225 Difference]: With dead ends: 461 [2021-06-05 14:00:24,593 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 14:00:24,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 14:00:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 321. [2021-06-05 14:00:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-06-05 14:00:24,598 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-06-05 14:00:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:24,598 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-06-05 14:00:24,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-06-05 14:00:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:24,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:24,598 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:24,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-06-05 14:00:24,799 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash -431145165, now seen corresponding path program 92 times [2021-06-05 14:00:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:24,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963398049] [2021-06-05 14:00:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:24,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963398049] [2021-06-05 14:00:24,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963398049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508786454] [2021-06-05 14:00:24,855 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 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 14:00:24,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:24,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:25,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:25,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:25,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:25,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:25,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:25,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:25,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508786454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:25,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:25,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434709695] [2021-06-05 14:00:25,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:25,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:25,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:25,086 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:25,357 INFO L93 Difference]: Finished difference Result 404 states and 1118 transitions. [2021-06-05 14:00:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:25,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:25,358 INFO L225 Difference]: With dead ends: 404 [2021-06-05 14:00:25,358 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 14:00:25,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 14:00:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 321. [2021-06-05 14:00:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-06-05 14:00:25,363 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-06-05 14:00:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:25,363 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-06-05 14:00:25,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:25,363 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-06-05 14:00:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:25,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:25,363 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:25,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 14:00:25,565 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash 288474162, now seen corresponding path program 93 times [2021-06-05 14:00:25,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:25,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516842346] [2021-06-05 14:00:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:25,594 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 14:00:25,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516842346] [2021-06-05 14:00:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516842346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388009957] [2021-06-05 14:00:25,594 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 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 14:00:25,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:25,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:25,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:25,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:25,649 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 14:00:25,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388009957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:25,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:25,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491365273] [2021-06-05 14:00:25,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:25,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:25,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:25,650 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:25,719 INFO L93 Difference]: Finished difference Result 535 states and 1451 transitions. [2021-06-05 14:00:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-06-05 14:00:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:25,721 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:00:25,721 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 14:00:25,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 14:00:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 405. [2021-06-05 14:00:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.027227722772277) internal successors, (1223), 404 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1223 transitions. [2021-06-05 14:00:25,726 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1223 transitions. Word has length 17 [2021-06-05 14:00:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:25,726 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1223 transitions. [2021-06-05 14:00:25,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1223 transitions. [2021-06-05 14:00:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:25,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:25,726 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:25,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1265 [2021-06-05 14:00:25,941 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1767950263, now seen corresponding path program 94 times [2021-06-05 14:00:25,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:25,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818925516] [2021-06-05 14:00:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818925516] [2021-06-05 14:00:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818925516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653717769] [2021-06-05 14:00:25,987 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 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 14:00:26,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:26,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:26,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:26,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:26,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:26,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653717769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:26,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150989274] [2021-06-05 14:00:26,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:26,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:26,192 INFO L87 Difference]: Start difference. First operand 405 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:26,371 INFO L93 Difference]: Finished difference Result 449 states and 1310 transitions. [2021-06-05 14:00:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 17 [2021-06-05 14:00:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:26,372 INFO L225 Difference]: With dead ends: 449 [2021-06-05 14:00:26,372 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:00:26,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:00:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 408. [2021-06-05 14:00:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2021-06-05 14:00:26,376 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 17 [2021-06-05 14:00:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:26,376 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2021-06-05 14:00:26,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2021-06-05 14:00:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:26,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:26,377 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:26,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1266,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:26,585 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash 899120009, now seen corresponding path program 95 times [2021-06-05 14:00:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:26,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355793689] [2021-06-05 14:00:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:26,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355793689] [2021-06-05 14:00:26,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355793689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173278827] [2021-06-05 14:00:26,642 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 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 14:00:26,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:26,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:26,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:26,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:26,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:26,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173278827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:26,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066651084] [2021-06-05 14:00:26,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:26,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:26,892 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:27,080 INFO L93 Difference]: Finished difference Result 472 states and 1325 transitions. [2021-06-05 14:00:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:27,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:27,081 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:00:27,081 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 14:00:27,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 14:00:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 408. [2021-06-05 14:00:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-06-05 14:00:27,086 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-06-05 14:00:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:27,086 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-06-05 14:00:27,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-06-05 14:00:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:27,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:27,087 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:27,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1292 [2021-06-05 14:00:27,288 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -603552507, now seen corresponding path program 96 times [2021-06-05 14:00:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:27,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869653597] [2021-06-05 14:00:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:27,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:27,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869653597] [2021-06-05 14:00:27,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869653597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:27,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069414] [2021-06-05 14:00:27,337 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 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 14:00:27,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:27,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:27,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:27,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:27,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:27,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:27,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:27,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:27,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:27,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709388707] [2021-06-05 14:00:27,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:27,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:27,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:27,541 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:27,752 INFO L93 Difference]: Finished difference Result 440 states and 1285 transitions. [2021-06-05 14:00:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 17 [2021-06-05 14:00:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:27,753 INFO L225 Difference]: With dead ends: 440 [2021-06-05 14:00:27,753 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:00:27,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:00:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 408. [2021-06-05 14:00:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-06-05 14:00:27,758 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-06-05 14:00:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:27,758 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-06-05 14:00:27,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-06-05 14:00:27,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:27,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:27,759 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:27,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:27,975 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1965935331, now seen corresponding path program 97 times [2021-06-05 14:00:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:27,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584708976] [2021-06-05 14:00:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584708976] [2021-06-05 14:00:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584708976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471910405] [2021-06-05 14:00:28,020 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 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 14:00:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:28,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:28,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:28,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:28,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:28,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:28,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471910405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:28,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:28,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692169534] [2021-06-05 14:00:28,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:28,263 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:28,445 INFO L93 Difference]: Finished difference Result 447 states and 1289 transitions. [2021-06-05 14:00:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:28,446 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:00:28,446 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 14:00:28,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 14:00:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 408. [2021-06-05 14:00:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-06-05 14:00:28,451 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-06-05 14:00:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:28,451 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-06-05 14:00:28,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-06-05 14:00:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:28,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:28,451 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:28,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1348 [2021-06-05 14:00:28,665 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -839626969, now seen corresponding path program 98 times [2021-06-05 14:00:28,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:28,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982165183] [2021-06-05 14:00:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:28,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:28,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982165183] [2021-06-05 14:00:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982165183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700476558] [2021-06-05 14:00:28,712 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 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 14:00:28,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:28,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:28,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:28,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:28,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:28,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:28,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:28,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700476558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:28,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:28,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231743118] [2021-06-05 14:00:28,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:28,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:28,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:28,931 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:29,071 INFO L93 Difference]: Finished difference Result 462 states and 1322 transitions. [2021-06-05 14:00:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:29,072 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:00:29,072 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:00:29,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:00:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 408. [2021-06-05 14:00:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-06-05 14:00:29,076 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-06-05 14:00:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:29,076 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-06-05 14:00:29,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-06-05 14:00:29,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:29,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:29,077 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:29,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 14:00:29,278 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1912712349, now seen corresponding path program 99 times [2021-06-05 14:00:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:29,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880214276] [2021-06-05 14:00:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:29,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:29,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880214276] [2021-06-05 14:00:29,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880214276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370996842] [2021-06-05 14:00:29,333 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 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 14:00:29,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:29,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:29,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:29,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:29,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:29,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:29,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:29,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:29,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:29,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370996842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:29,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:29,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765166177] [2021-06-05 14:00:29,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:29,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:29,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:29,545 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:29,735 INFO L93 Difference]: Finished difference Result 490 states and 1379 transitions. [2021-06-05 14:00:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:29,736 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:00:29,736 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:00:29,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:00:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 408. [2021-06-05 14:00:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0) internal successors, (1221), 407 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1221 transitions. [2021-06-05 14:00:29,740 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1221 transitions. Word has length 17 [2021-06-05 14:00:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:29,740 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1221 transitions. [2021-06-05 14:00:29,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1221 transitions. [2021-06-05 14:00:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:29,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:29,741 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:29,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-06-05 14:00:29,941 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1193093022, now seen corresponding path program 100 times [2021-06-05 14:00:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:29,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401215480] [2021-06-05 14:00:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:29,971 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 14:00:29,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:29,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401215480] [2021-06-05 14:00:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401215480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286186341] [2021-06-05 14:00:29,972 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 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 14:00:29,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:30,020 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 14:00:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286186341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:30,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:30,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:30,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128665206] [2021-06-05 14:00:30,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:30,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:30,021 INFO L87 Difference]: Start difference. First operand 408 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 14:00:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:30,091 INFO L93 Difference]: Finished difference Result 549 states and 1446 transitions. [2021-06-05 14:00:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 14:00:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:30,092 INFO L225 Difference]: With dead ends: 549 [2021-06-05 14:00:30,092 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:00:30,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:00:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 317. [2021-06-05 14:00:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-06-05 14:00:30,096 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-06-05 14:00:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:30,096 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-06-05 14:00:30,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 14:00:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-06-05 14:00:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:30,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:30,096 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:30,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-06-05 14:00:30,297 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:30,297 INFO L82 PathProgramCache]: Analyzing trace with hash -818620761, now seen corresponding path program 101 times [2021-06-05 14:00:30,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:30,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371733819] [2021-06-05 14:00:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:30,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:30,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371733819] [2021-06-05 14:00:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371733819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:30,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964158538] [2021-06-05 14:00:30,361 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 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 14:00:30,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:30,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:30,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:30,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:30,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:30,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:30,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:30,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:30,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:30,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964158538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:30,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:30,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044169723] [2021-06-05 14:00:30,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:30,615 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:30,856 INFO L93 Difference]: Finished difference Result 398 states and 1075 transitions. [2021-06-05 14:00:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:30,857 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:00:30,857 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 14:00:30,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 14:00:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 317. [2021-06-05 14:00:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-06-05 14:00:30,861 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-06-05 14:00:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:30,861 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-06-05 14:00:30,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-06-05 14:00:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:30,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:30,861 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:31,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:31,066 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1699439288, now seen corresponding path program 102 times [2021-06-05 14:00:31,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:31,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828521028] [2021-06-05 14:00:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:31,097 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 14:00:31,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828521028] [2021-06-05 14:00:31,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828521028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612762462] [2021-06-05 14:00:31,097 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 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 14:00:31,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:00:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:31,151 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 14:00:31,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612762462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:31,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:31,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723584880] [2021-06-05 14:00:31,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:31,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:31,152 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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 14:00:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:31,248 INFO L93 Difference]: Finished difference Result 478 states and 1278 transitions. [2021-06-05 14:00:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-06-05 14:00:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:31,249 INFO L225 Difference]: With dead ends: 478 [2021-06-05 14:00:31,249 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 14:00:31,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 14:00:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 361. [2021-06-05 14:00:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9611111111111112) internal successors, (1066), 360 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1066 transitions. [2021-06-05 14:00:31,253 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1066 transitions. Word has length 17 [2021-06-05 14:00:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:31,253 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1066 transitions. [2021-06-05 14:00:31,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 14:00:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1066 transitions. [2021-06-05 14:00:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:31,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:31,254 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:31,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1462,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:31,454 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash 815564467, now seen corresponding path program 103 times [2021-06-05 14:00:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:31,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811004286] [2021-06-05 14:00:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:31,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811004286] [2021-06-05 14:00:31,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811004286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358222765] [2021-06-05 14:00:31,512 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 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 14:00:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:31,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:31,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:31,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:31,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:31,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:31,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:31,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358222765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:31,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:31,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41378232] [2021-06-05 14:00:31,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:31,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:31,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:31,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:31,745 INFO L87 Difference]: Start difference. First operand 361 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) 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 14:00:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:31,955 INFO L93 Difference]: Finished difference Result 418 states and 1180 transitions. [2021-06-05 14:00:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 17 [2021-06-05 14:00:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:31,956 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:00:31,956 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 14:00:31,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 14:00:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2021-06-05 14:00:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.967123287671233) internal successors, (1083), 365 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1083 transitions. [2021-06-05 14:00:31,960 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1083 transitions. Word has length 17 [2021-06-05 14:00:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:31,960 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1083 transitions. [2021-06-05 14:00:31,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) 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 14:00:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1083 transitions. [2021-06-05 14:00:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:31,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:31,960 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:32,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-06-05 14:00:32,161 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1764893969, now seen corresponding path program 104 times [2021-06-05 14:00:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:32,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247813956] [2021-06-05 14:00:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:32,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:32,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247813956] [2021-06-05 14:00:32,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247813956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:32,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893659624] [2021-06-05 14:00:32,220 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 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 14:00:32,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:32,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:32,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:32,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:32,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:32,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:32,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:32,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893659624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:32,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:32,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:32,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326270267] [2021-06-05 14:00:32,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:32,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:32,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:32,454 INFO L87 Difference]: Start difference. First operand 366 states and 1083 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:32,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:32,680 INFO L93 Difference]: Finished difference Result 443 states and 1194 transitions. [2021-06-05 14:00:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:00:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:32,681 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:00:32,681 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:00:32,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:00:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 366. [2021-06-05 14:00:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-06-05 14:00:32,686 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-06-05 14:00:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:32,686 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-06-05 14:00:32,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-06-05 14:00:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:32,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:32,686 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:32,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1486,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:32,893 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 712505045, now seen corresponding path program 105 times [2021-06-05 14:00:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:32,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484075297] [2021-06-05 14:00:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:32,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:32,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484075297] [2021-06-05 14:00:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484075297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:32,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909370484] [2021-06-05 14:00:32,942 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 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 14:00:32,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:32,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:33,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:33,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:33,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:33,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:33,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:33,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909370484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:33,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:33,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278345998] [2021-06-05 14:00:33,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:33,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:33,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:33,168 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:33,369 INFO L93 Difference]: Finished difference Result 398 states and 1150 transitions. [2021-06-05 14:00:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 17 [2021-06-05 14:00:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:33,370 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:00:33,370 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 14:00:33,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 14:00:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 366. [2021-06-05 14:00:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-06-05 14:00:33,375 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-06-05 14:00:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:33,375 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-06-05 14:00:33,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14:00:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-06-05 14:00:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:33,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:33,375 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:33,581 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1012974413, now seen corresponding path program 106 times [2021-06-05 14:00:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:33,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635842870] [2021-06-05 14:00:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635842870] [2021-06-05 14:00:33,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635842870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474353529] [2021-06-05 14:00:33,629 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 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 14:00:33,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:33,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:33,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:33,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:33,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:33,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:33,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:33,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474353529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:33,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:33,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426227571] [2021-06-05 14:00:33,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:33,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:33,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:33,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:33,840 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:34,063 INFO L93 Difference]: Finished difference Result 409 states and 1153 transitions. [2021-06-05 14:00:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:34,064 INFO L225 Difference]: With dead ends: 409 [2021-06-05 14:00:34,064 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 14:00:34,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 14:00:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 366. [2021-06-05 14:00:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-06-05 14:00:34,068 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-06-05 14:00:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:34,068 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-06-05 14:00:34,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-06-05 14:00:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:34,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:34,069 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:34,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:34,273 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1645968754, now seen corresponding path program 107 times [2021-06-05 14:00:34,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:34,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728951935] [2021-06-05 14:00:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:34,303 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 14:00:34,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728951935] [2021-06-05 14:00:34,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728951935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575328122] [2021-06-05 14:00:34,304 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 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 14:00:34,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:34,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575328122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:34,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:34,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282623095] [2021-06-05 14:00:34,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:34,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:34,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:34,354 INFO L87 Difference]: Start difference. First operand 366 states and 1081 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 14:00:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:34,397 INFO L93 Difference]: Finished difference Result 517 states and 1369 transitions. [2021-06-05 14:00:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:34,397 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 17 [2021-06-05 14:00:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:34,398 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:00:34,398 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:00:34,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:00:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 397. [2021-06-05 14:00:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.9823232323232323) internal successors, (1181), 396 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1181 transitions. [2021-06-05 14:00:34,403 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1181 transitions. Word has length 17 [2021-06-05 14:00:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:34,403 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1181 transitions. [2021-06-05 14:00:34,403 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 14:00:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1181 transitions. [2021-06-05 14:00:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:34,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:34,403 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:34,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 14:00:34,604 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash 476430583, now seen corresponding path program 108 times [2021-06-05 14:00:34,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:34,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988595147] [2021-06-05 14:00:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:34,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:34,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988595147] [2021-06-05 14:00:34,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988595147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406108824] [2021-06-05 14:00:34,658 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 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 14:00:34,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:00:34,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:34,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:34,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:34,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:34,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:34,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:34,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406108824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:34,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031829036] [2021-06-05 14:00:34,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:34,868 INFO L87 Difference]: Start difference. First operand 397 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:35,091 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-06-05 14:00:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:35,094 INFO L225 Difference]: With dead ends: 450 [2021-06-05 14:00:35,094 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:00:35,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:00:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 399. [2021-06-05 14:00:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.979899497487437) internal successors, (1186), 398 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1186 transitions. [2021-06-05 14:00:35,099 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1186 transitions. Word has length 17 [2021-06-05 14:00:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:35,099 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1186 transitions. [2021-06-05 14:00:35,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1186 transitions. [2021-06-05 14:00:35,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:35,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:35,099 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:35,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1587 [2021-06-05 14:00:35,300 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:35,300 INFO L82 PathProgramCache]: Analyzing trace with hash -414891048, now seen corresponding path program 109 times [2021-06-05 14:00:35,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:35,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268587560] [2021-06-05 14:00:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:35,329 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 14:00:35,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:35,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268587560] [2021-06-05 14:00:35,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268587560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121213415] [2021-06-05 14:00:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:00:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121213415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:35,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:35,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106641833] [2021-06-05 14:00:35,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:35,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:35,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:35,379 INFO L87 Difference]: Start difference. First operand 399 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:35,439 INFO L93 Difference]: Finished difference Result 520 states and 1374 transitions. [2021-06-05 14:00:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:35,440 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:00:35,441 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:00:35,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:00:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-06-05 14:00:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-06-05 14:00:35,445 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-06-05 14:00:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:35,445 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-06-05 14:00:35,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-06-05 14:00:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:35,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:35,446 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:35,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1612 [2021-06-05 14:00:35,653 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash -596654797, now seen corresponding path program 110 times [2021-06-05 14:00:35,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:35,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318496268] [2021-06-05 14:00:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:35,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318496268] [2021-06-05 14:00:35,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318496268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320063592] [2021-06-05 14:00:35,708 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 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 14:00:35,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:35,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:35,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:35,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:35,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:35,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:35,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:35,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320063592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:35,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:00:35,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796822387] [2021-06-05 14:00:35,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:00:35,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:00:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:35,935 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:36,118 INFO L93 Difference]: Finished difference Result 459 states and 1275 transitions. [2021-06-05 14:00:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 17 [2021-06-05 14:00:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:36,119 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:00:36,119 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:00:36,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:00:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 396. [2021-06-05 14:00:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-06-05 14:00:36,124 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-06-05 14:00:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:36,124 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-06-05 14:00:36,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) 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 14:00:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-06-05 14:00:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:36,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:36,124 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:36,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1613,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:36,341 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash 122964530, now seen corresponding path program 111 times [2021-06-05 14:00:36,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:36,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69819724] [2021-06-05 14:00:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:36,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:36,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69819724] [2021-06-05 14:00:36,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69819724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289364765] [2021-06-05 14:00:36,368 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 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 14:00:36,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:36,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:36,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:36,428 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 14:00:36,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289364765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:36,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:36,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179695892] [2021-06-05 14:00:36,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:36,429 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:36,469 INFO L93 Difference]: Finished difference Result 484 states and 1366 transitions. [2021-06-05 14:00:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:00:36,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:36,470 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:00:36,470 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:00:36,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:00:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 431. [2021-06-05 14:00:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.974418604651163) internal successors, (1279), 430 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1279 transitions. [2021-06-05 14:00:36,475 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1279 transitions. Word has length 17 [2021-06-05 14:00:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:36,475 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1279 transitions. [2021-06-05 14:00:36,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1279 transitions. [2021-06-05 14:00:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:36,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:36,475 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:36,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1642 [2021-06-05 14:00:36,691 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 497436791, now seen corresponding path program 112 times [2021-06-05 14:00:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:36,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547298859] [2021-06-05 14:00:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:36,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547298859] [2021-06-05 14:00:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547298859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792694778] [2021-06-05 14:00:36,742 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 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 14:00:36,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:36,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:36,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:36,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:36,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:36,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:36,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:36,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:36,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:36,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792694778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:36,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:36,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395472278] [2021-06-05 14:00:36,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:36,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:36,997 INFO L87 Difference]: Start difference. First operand 431 states and 1279 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:37,263 INFO L93 Difference]: Finished difference Result 508 states and 1390 transitions. [2021-06-05 14:00:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:00:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:37,264 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:00:37,264 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:00:37,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:00:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-06-05 14:00:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.969767441860465) internal successors, (1277), 430 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1277 transitions. [2021-06-05 14:00:37,269 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1277 transitions. Word has length 17 [2021-06-05 14:00:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:37,269 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1277 transitions. [2021-06-05 14:00:37,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1277 transitions. [2021-06-05 14:00:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:37,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:37,269 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:37,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1643,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:37,470 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash -383381736, now seen corresponding path program 113 times [2021-06-05 14:00:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389388428] [2021-06-05 14:00:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:37,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389388428] [2021-06-05 14:00:37,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389388428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817689800] [2021-06-05 14:00:37,505 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 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 14:00:37,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:37,563 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 14:00:37,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817689800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:37,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:37,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379244854] [2021-06-05 14:00:37,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:37,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:37,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:37,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:37,563 INFO L87 Difference]: Start difference. First operand 431 states and 1277 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:37,636 INFO L93 Difference]: Finished difference Result 511 states and 1418 transitions. [2021-06-05 14:00:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-05 14:00:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:37,637 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:00:37,637 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:00:37,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:00:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 438. [2021-06-05 14:00:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9702517162471396) internal successors, (1298), 437 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1298 transitions. [2021-06-05 14:00:37,642 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1298 transitions. Word has length 17 [2021-06-05 14:00:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:37,642 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1298 transitions. [2021-06-05 14:00:37,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1298 transitions. [2021-06-05 14:00:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:37,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:37,642 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:37,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:37,860 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:37,860 INFO L82 PathProgramCache]: Analyzing trace with hash 54537651, now seen corresponding path program 114 times [2021-06-05 14:00:37,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:37,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260837093] [2021-06-05 14:00:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:37,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:37,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260837093] [2021-06-05 14:00:37,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260837093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:37,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408360697] [2021-06-05 14:00:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:00:37,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:37,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:00:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:38,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:38,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:38,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:38,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:38,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:38,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:38,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408360697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:38,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:00:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852791062] [2021-06-05 14:00:38,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:00:38,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:00:38,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:38,164 INFO L87 Difference]: Start difference. First operand 438 states and 1298 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:38,457 INFO L93 Difference]: Finished difference Result 574 states and 1607 transitions. [2021-06-05 14:00:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 17 [2021-06-05 14:00:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:38,459 INFO L225 Difference]: With dead ends: 574 [2021-06-05 14:00:38,459 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 14:00:38,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 14:00:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 440. [2021-06-05 14:00:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.9635535307517085) internal successors, (1301), 439 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1301 transitions. [2021-06-05 14:00:38,464 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1301 transitions. Word has length 17 [2021-06-05 14:00:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:38,464 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1301 transitions. [2021-06-05 14:00:38,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 14:00:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1301 transitions. [2021-06-05 14:00:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:38,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:38,464 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:38,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-06-05 14:00:38,681 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1099753202, now seen corresponding path program 115 times [2021-06-05 14:00:38,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:38,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304375955] [2021-06-05 14:00:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:38,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:38,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304375955] [2021-06-05 14:00:38,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304375955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894726541] [2021-06-05 14:00:38,715 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 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 14:00:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:38,762 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 14:00:38,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894726541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:38,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:38,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083546099] [2021-06-05 14:00:38,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:38,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:38,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:38,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:38,762 INFO L87 Difference]: Start difference. First operand 440 states and 1301 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:38,861 INFO L93 Difference]: Finished difference Result 560 states and 1538 transitions. [2021-06-05 14:00:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:38,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2021-06-05 14:00:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:38,862 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:00:38,862 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:00:38,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:00:38,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 454. [2021-06-05 14:00:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.964679911699779) internal successors, (1343), 453 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1343 transitions. [2021-06-05 14:00:38,867 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1343 transitions. Word has length 17 [2021-06-05 14:00:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:38,867 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1343 transitions. [2021-06-05 14:00:38,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:38,867 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1343 transitions. [2021-06-05 14:00:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:38,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:38,867 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:39,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:39,068 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:39,068 INFO L82 PathProgramCache]: Analyzing trace with hash -63868743, now seen corresponding path program 116 times [2021-06-05 14:00:39,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:39,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396174922] [2021-06-05 14:00:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:39,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396174922] [2021-06-05 14:00:39,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396174922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831251103] [2021-06-05 14:00:39,110 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 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 14:00:39,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:39,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:39,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831251103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:39,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:39,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245367806] [2021-06-05 14:00:39,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:39,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:39,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:39,162 INFO L87 Difference]: Start difference. First operand 454 states and 1343 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 14:00:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:39,255 INFO L93 Difference]: Finished difference Result 589 states and 1553 transitions. [2021-06-05 14:00:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 14:00:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:39,256 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:00:39,256 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:00:39,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:00:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 449. [2021-06-05 14:00:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.9575892857142856) internal successors, (1325), 448 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1325 transitions. [2021-06-05 14:00:39,262 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1325 transitions. Word has length 18 [2021-06-05 14:00:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:39,262 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1325 transitions. [2021-06-05 14:00:39,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 14:00:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1325 transitions. [2021-06-05 14:00:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:39,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:39,262 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:39,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:39,477 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1505890382, now seen corresponding path program 117 times [2021-06-05 14:00:39,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:39,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359421968] [2021-06-05 14:00:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:39,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359421968] [2021-06-05 14:00:39,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359421968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210002596] [2021-06-05 14:00:39,519 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 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 14:00:39,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:39,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:39,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210002596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:39,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:39,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828337769] [2021-06-05 14:00:39,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:39,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:39,571 INFO L87 Difference]: Start difference. First operand 449 states and 1325 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 14:00:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:39,704 INFO L93 Difference]: Finished difference Result 621 states and 1652 transitions. [2021-06-05 14:00:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 14:00:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:39,705 INFO L225 Difference]: With dead ends: 621 [2021-06-05 14:00:39,705 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 14:00:39,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 14:00:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 459. [2021-06-05 14:00:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2021-06-05 14:00:39,711 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 18 [2021-06-05 14:00:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2021-06-05 14:00:39,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 14:00:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2021-06-05 14:00:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:39,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:39,713 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:39,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-06-05 14:00:39,925 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1639250247, now seen corresponding path program 118 times [2021-06-05 14:00:39,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:39,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517318575] [2021-06-05 14:00:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517318575] [2021-06-05 14:00:39,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517318575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313571462] [2021-06-05 14:00:39,954 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 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 14:00:39,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313571462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:39,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510103402] [2021-06-05 14:00:39,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:39,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:39,999 INFO L87 Difference]: Start difference. First operand 459 states and 1352 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:40,067 INFO L93 Difference]: Finished difference Result 506 states and 1421 transitions. [2021-06-05 14:00:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:40,068 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:00:40,068 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:00:40,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:00:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 459. [2021-06-05 14:00:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.945414847161572) internal successors, (1349), 458 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1349 transitions. [2021-06-05 14:00:40,073 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1349 transitions. Word has length 18 [2021-06-05 14:00:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:40,073 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1349 transitions. [2021-06-05 14:00:40,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1349 transitions. [2021-06-05 14:00:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:40,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:40,074 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:40,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1715,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:40,287 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:40,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1019692920, now seen corresponding path program 119 times [2021-06-05 14:00:40,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:40,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390367810] [2021-06-05 14:00:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390367810] [2021-06-05 14:00:40,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390367810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532745351] [2021-06-05 14:00:40,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:00:40,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:40,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532745351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:40,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:40,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276740815] [2021-06-05 14:00:40,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:40,369 INFO L87 Difference]: Start difference. First operand 459 states and 1349 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:40,407 INFO L93 Difference]: Finished difference Result 603 states and 1587 transitions. [2021-06-05 14:00:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:40,408 INFO L225 Difference]: With dead ends: 603 [2021-06-05 14:00:40,408 INFO L226 Difference]: Without dead ends: 603 [2021-06-05 14:00:40,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-05 14:00:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 454. [2021-06-05 14:00:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.933774834437086) internal successors, (1329), 453 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1329 transitions. [2021-06-05 14:00:40,413 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1329 transitions. Word has length 18 [2021-06-05 14:00:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:40,413 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1329 transitions. [2021-06-05 14:00:40,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1329 transitions. [2021-06-05 14:00:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:40,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:40,415 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:40,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1716,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:40,625 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1889932499, now seen corresponding path program 120 times [2021-06-05 14:00:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:40,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368938951] [2021-06-05 14:00:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:40,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368938951] [2021-06-05 14:00:40,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368938951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663126864] [2021-06-05 14:00:40,662 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 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 14:00:40,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:00:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663126864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:40,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:40,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97897674] [2021-06-05 14:00:40,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:40,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:40,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:40,707 INFO L87 Difference]: Start difference. First operand 454 states and 1329 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:40,782 INFO L93 Difference]: Finished difference Result 518 states and 1445 transitions. [2021-06-05 14:00:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:40,782 INFO L225 Difference]: With dead ends: 518 [2021-06-05 14:00:40,783 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 14:00:40,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 14:00:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 454. [2021-06-05 14:00:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-06-05 14:00:40,788 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-06-05 14:00:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-06-05 14:00:40,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-06-05 14:00:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:40,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:40,788 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:40,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1717,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:40,993 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1513713166, now seen corresponding path program 121 times [2021-06-05 14:00:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:40,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141303973] [2021-06-05 14:00:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141303973] [2021-06-05 14:00:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141303973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084665075] [2021-06-05 14:00:41,030 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 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 14:00:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084665075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:41,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882209134] [2021-06-05 14:00:41,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:41,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:41,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:41,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:41,077 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:41,130 INFO L93 Difference]: Finished difference Result 643 states and 1687 transitions. [2021-06-05 14:00:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:41,131 INFO L225 Difference]: With dead ends: 643 [2021-06-05 14:00:41,131 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 14:00:41,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 14:00:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 454. [2021-06-05 14:00:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-06-05 14:00:41,137 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-06-05 14:00:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,137 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-06-05 14:00:41,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-06-05 14:00:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:41,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,138 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:41,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:41,353 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 238012123, now seen corresponding path program 122 times [2021-06-05 14:00:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:41,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951946686] [2021-06-05 14:00:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:41,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951946686] [2021-06-05 14:00:41,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951946686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248530444] [2021-06-05 14:00:41,381 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 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 14:00:41,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:41,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:41,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:41,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248530444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:41,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:41,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453443919] [2021-06-05 14:00:41,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:41,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:41,435 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:41,476 INFO L93 Difference]: Finished difference Result 607 states and 1609 transitions. [2021-06-05 14:00:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:00:41,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-06-05 14:00:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:41,476 INFO L225 Difference]: With dead ends: 607 [2021-06-05 14:00:41,477 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 14:00:41,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 14:00:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 455. [2021-06-05 14:00:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.909691629955947) internal successors, (1321), 454 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1321 transitions. [2021-06-05 14:00:41,482 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1321 transitions. Word has length 18 [2021-06-05 14:00:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,482 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1321 transitions. [2021-06-05 14:00:41,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1321 transitions. [2021-06-05 14:00:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:41,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,483 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:41,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:41,693 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash -539137476, now seen corresponding path program 123 times [2021-06-05 14:00:41,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:41,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589659905] [2021-06-05 14:00:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:41,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589659905] [2021-06-05 14:00:41,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589659905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685115417] [2021-06-05 14:00:41,717 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 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 14:00:41,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:41,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685115417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:41,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484963674] [2021-06-05 14:00:41,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:41,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:41,761 INFO L87 Difference]: Start difference. First operand 455 states and 1321 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:41,828 INFO L93 Difference]: Finished difference Result 580 states and 1522 transitions. [2021-06-05 14:00:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-06-05 14:00:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:41,829 INFO L225 Difference]: With dead ends: 580 [2021-06-05 14:00:41,829 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:00:41,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:00:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 463. [2021-06-05 14:00:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-06-05 14:00:41,834 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 18 [2021-06-05 14:00:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,834 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-06-05 14:00:41,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-06-05 14:00:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:41,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,835 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:42,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1720 [2021-06-05 14:00:42,041 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1937661, now seen corresponding path program 124 times [2021-06-05 14:00:42,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:42,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715308353] [2021-06-05 14:00:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715308353] [2021-06-05 14:00:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715308353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136159959] [2021-06-05 14:00:42,074 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 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 14:00:42,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:42,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136159959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:42,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:42,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886529467] [2021-06-05 14:00:42,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:42,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:42,122 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:42,198 INFO L93 Difference]: Finished difference Result 556 states and 1501 transitions. [2021-06-05 14:00:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:42,199 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:00:42,199 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 14:00:42,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 14:00:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 441. [2021-06-05 14:00:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.9204545454545454) internal successors, (1285), 440 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1285 transitions. [2021-06-05 14:00:42,204 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1285 transitions. Word has length 18 [2021-06-05 14:00:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:42,204 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1285 transitions. [2021-06-05 14:00:42,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1285 transitions. [2021-06-05 14:00:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:42,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:42,205 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:42,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-06-05 14:00:42,405 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash -889383970, now seen corresponding path program 125 times [2021-06-05 14:00:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566079733] [2021-06-05 14:00:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:42,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566079733] [2021-06-05 14:00:42,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566079733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613878435] [2021-06-05 14:00:42,433 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 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 14:00:42,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:42,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:42,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:42,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613878435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:42,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:42,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096888085] [2021-06-05 14:00:42,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:42,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:42,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:42,478 INFO L87 Difference]: Start difference. First operand 441 states and 1285 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:42,526 INFO L93 Difference]: Finished difference Result 589 states and 1530 transitions. [2021-06-05 14:00:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:42,529 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:00:42,529 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 14:00:42,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 14:00:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 433. [2021-06-05 14:00:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.9074074074074074) internal successors, (1256), 432 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1256 transitions. [2021-06-05 14:00:42,534 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1256 transitions. Word has length 18 [2021-06-05 14:00:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:42,534 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1256 transitions. [2021-06-05 14:00:42,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1256 transitions. [2021-06-05 14:00:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:42,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:42,535 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:42,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-06-05 14:00:42,751 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1071147719, now seen corresponding path program 126 times [2021-06-05 14:00:42,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:42,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994188398] [2021-06-05 14:00:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:42,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994188398] [2021-06-05 14:00:42,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994188398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122305750] [2021-06-05 14:00:42,782 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:42,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:00:42,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:42,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122305750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:42,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689627983] [2021-06-05 14:00:42,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:42,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:42,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:42,831 INFO L87 Difference]: Start difference. First operand 433 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:42,914 INFO L93 Difference]: Finished difference Result 534 states and 1436 transitions. [2021-06-05 14:00:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:42,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:42,915 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:00:42,915 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:00:42,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:00:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 435. [2021-06-05 14:00:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8940092165898617) internal successors, (1256), 434 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1256 transitions. [2021-06-05 14:00:42,920 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1256 transitions. Word has length 18 [2021-06-05 14:00:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:42,920 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1256 transitions. [2021-06-05 14:00:42,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1256 transitions. [2021-06-05 14:00:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:42,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:42,921 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:43,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1723,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:43,138 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash -351528392, now seen corresponding path program 127 times [2021-06-05 14:00:43,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:43,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518334012] [2021-06-05 14:00:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:43,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:43,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518334012] [2021-06-05 14:00:43,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518334012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768576008] [2021-06-05 14:00:43,179 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 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 14:00:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768576008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:43,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395814685] [2021-06-05 14:00:43,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:43,230 INFO L87 Difference]: Start difference. First operand 435 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:43,306 INFO L93 Difference]: Finished difference Result 650 states and 1663 transitions. [2021-06-05 14:00:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:43,307 INFO L225 Difference]: With dead ends: 650 [2021-06-05 14:00:43,307 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 14:00:43,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 14:00:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 416. [2021-06-05 14:00:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.8891566265060242) internal successors, (1199), 415 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1199 transitions. [2021-06-05 14:00:43,313 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1199 transitions. Word has length 18 [2021-06-05 14:00:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:43,313 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1199 transitions. [2021-06-05 14:00:43,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1199 transitions. [2021-06-05 14:00:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:43,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:43,313 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:43,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1724,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:43,514 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1243555061, now seen corresponding path program 128 times [2021-06-05 14:00:43,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:43,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958923994] [2021-06-05 14:00:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:43,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:43,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958923994] [2021-06-05 14:00:43,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958923994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616296025] [2021-06-05 14:00:43,543 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 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 14:00:43,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:43,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616296025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:43,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:43,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746083035] [2021-06-05 14:00:43,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:43,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:43,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:43,591 INFO L87 Difference]: Start difference. First operand 416 states and 1199 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:43,627 INFO L93 Difference]: Finished difference Result 564 states and 1469 transitions. [2021-06-05 14:00:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:00:43,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-06-05 14:00:43,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:43,628 INFO L225 Difference]: With dead ends: 564 [2021-06-05 14:00:43,628 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:00:43,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:00:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 408. [2021-06-05 14:00:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.8746928746928746) internal successors, (1170), 407 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1170 transitions. [2021-06-05 14:00:43,633 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1170 transitions. Word has length 18 [2021-06-05 14:00:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:43,633 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1170 transitions. [2021-06-05 14:00:43,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1170 transitions. [2021-06-05 14:00:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:43,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:43,634 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:43,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1725 [2021-06-05 14:00:43,835 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash -2020704660, now seen corresponding path program 129 times [2021-06-05 14:00:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:43,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176654739] [2021-06-05 14:00:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:43,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:43,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176654739] [2021-06-05 14:00:43,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176654739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180671978] [2021-06-05 14:00:43,866 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 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 14:00:43,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:43,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:43,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180671978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:43,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:43,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692232073] [2021-06-05 14:00:43,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:43,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:43,913 INFO L87 Difference]: Start difference. First operand 408 states and 1170 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:43,977 INFO L93 Difference]: Finished difference Result 517 states and 1347 transitions. [2021-06-05 14:00:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:43,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-06-05 14:00:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:43,978 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:00:43,978 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 14:00:43,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:43,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 14:00:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 394. [2021-06-05 14:00:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8575063613231553) internal successors, (1123), 393 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1123 transitions. [2021-06-05 14:00:43,983 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1123 transitions. Word has length 18 [2021-06-05 14:00:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:43,983 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1123 transitions. [2021-06-05 14:00:43,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1123 transitions. [2021-06-05 14:00:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:43,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:43,984 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1726,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:44,184 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1742252393, now seen corresponding path program 130 times [2021-06-05 14:00:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688930854] [2021-06-05 14:00:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:44,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688930854] [2021-06-05 14:00:44,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688930854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560700980] [2021-06-05 14:00:44,220 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 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 14:00:44,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560700980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:44,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:44,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552040278] [2021-06-05 14:00:44,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:44,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:44,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:44,263 INFO L87 Difference]: Start difference. First operand 394 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:44,348 INFO L93 Difference]: Finished difference Result 504 states and 1317 transitions. [2021-06-05 14:00:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:44,349 INFO L225 Difference]: With dead ends: 504 [2021-06-05 14:00:44,349 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:00:44,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:44,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:00:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 382. [2021-06-05 14:00:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8451443569553807) internal successors, (1084), 381 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1084 transitions. [2021-06-05 14:00:44,353 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1084 transitions. Word has length 18 [2021-06-05 14:00:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:44,353 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1084 transitions. [2021-06-05 14:00:44,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1084 transitions. [2021-06-05 14:00:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:44,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:44,354 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:44,554 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1833095576, now seen corresponding path program 131 times [2021-06-05 14:00:44,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540472886] [2021-06-05 14:00:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540472886] [2021-06-05 14:00:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540472886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845093080] [2021-06-05 14:00:44,596 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 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 14:00:44,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:44,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:44,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:44,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845093080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:44,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229477158] [2021-06-05 14:00:44,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:44,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:44,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:44,644 INFO L87 Difference]: Start difference. First operand 382 states and 1084 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:44,714 INFO L93 Difference]: Finished difference Result 511 states and 1300 transitions. [2021-06-05 14:00:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:44,715 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:00:44,715 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:00:44,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:00:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 377. [2021-06-05 14:00:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8324468085106385) internal successors, (1065), 376 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1065 transitions. [2021-06-05 14:00:44,720 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1065 transitions. Word has length 18 [2021-06-05 14:00:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:44,720 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1065 transitions. [2021-06-05 14:00:44,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1065 transitions. [2021-06-05 14:00:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:44,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:44,720 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:44,925 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1458623315, now seen corresponding path program 132 times [2021-06-05 14:00:44,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920909448] [2021-06-05 14:00:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:44,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920909448] [2021-06-05 14:00:44,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920909448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559470424] [2021-06-05 14:00:44,961 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 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 14:00:44,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559470424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:45,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:45,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426620122] [2021-06-05 14:00:45,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:45,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:45,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:45,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:45,007 INFO L87 Difference]: Start difference. First operand 377 states and 1065 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:45,075 INFO L93 Difference]: Finished difference Result 521 states and 1359 transitions. [2021-06-05 14:00:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:45,075 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:00:45,075 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:00:45,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:00:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 377. [2021-06-05 14:00:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8297872340425534) internal successors, (1064), 376 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1064 transitions. [2021-06-05 14:00:45,080 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1064 transitions. Word has length 18 [2021-06-05 14:00:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:45,080 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1064 transitions. [2021-06-05 14:00:45,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1064 transitions. [2021-06-05 14:00:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:45,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:45,081 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:45,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:45,281 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1955525454, now seen corresponding path program 133 times [2021-06-05 14:00:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:45,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606131737] [2021-06-05 14:00:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:45,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606131737] [2021-06-05 14:00:45,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606131737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878696887] [2021-06-05 14:00:45,315 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 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 14:00:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878696887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:45,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:45,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29431219] [2021-06-05 14:00:45,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:45,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:45,363 INFO L87 Difference]: Start difference. First operand 377 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:45,456 INFO L93 Difference]: Finished difference Result 650 states and 1689 transitions. [2021-06-05 14:00:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:45,457 INFO L225 Difference]: With dead ends: 650 [2021-06-05 14:00:45,457 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 14:00:45,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 14:00:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 394. [2021-06-05 14:00:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8066157760814248) internal successors, (1103), 393 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1103 transitions. [2021-06-05 14:00:45,462 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1103 transitions. Word has length 18 [2021-06-05 14:00:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:45,462 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1103 transitions. [2021-06-05 14:00:45,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1103 transitions. [2021-06-05 14:00:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:45,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:45,463 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:45,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 14:00:45,663 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash 175561913, now seen corresponding path program 134 times [2021-06-05 14:00:45,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:45,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339609632] [2021-06-05 14:00:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339609632] [2021-06-05 14:00:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339609632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192027235] [2021-06-05 14:00:45,692 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 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 14:00:45,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:45,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:45,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:45,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192027235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:45,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:45,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679665745] [2021-06-05 14:00:45,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:45,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:45,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:45,738 INFO L87 Difference]: Start difference. First operand 394 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:45,794 INFO L93 Difference]: Finished difference Result 503 states and 1306 transitions. [2021-06-05 14:00:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:45,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 14:00:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:45,795 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:00:45,795 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 14:00:45,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 14:00:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 398. [2021-06-05 14:00:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.808564231738035) internal successors, (1115), 397 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1115 transitions. [2021-06-05 14:00:45,799 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1115 transitions. Word has length 18 [2021-06-05 14:00:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:45,799 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1115 transitions. [2021-06-05 14:00:45,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1115 transitions. [2021-06-05 14:00:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:45,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:45,800 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:46,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-06-05 14:00:46,000 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1853728120, now seen corresponding path program 135 times [2021-06-05 14:00:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413262280] [2021-06-05 14:00:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:46,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413262280] [2021-06-05 14:00:46,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413262280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595004336] [2021-06-05 14:00:46,034 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 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 14:00:46,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:46,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:46,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:46,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595004336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:46,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:46,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284060505] [2021-06-05 14:00:46,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:46,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:46,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:46,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:46,080 INFO L87 Difference]: Start difference. First operand 398 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:46,163 INFO L93 Difference]: Finished difference Result 494 states and 1259 transitions. [2021-06-05 14:00:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-06-05 14:00:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:46,164 INFO L225 Difference]: With dead ends: 494 [2021-06-05 14:00:46,164 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:00:46,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:00:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 398. [2021-06-05 14:00:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.8060453400503778) internal successors, (1114), 397 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1114 transitions. [2021-06-05 14:00:46,168 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1114 transitions. Word has length 18 [2021-06-05 14:00:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:46,168 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1114 transitions. [2021-06-05 14:00:46,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 14:00:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1114 transitions. [2021-06-05 14:00:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:46,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:46,169 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:46,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1732 [2021-06-05 14:00:46,369 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1124891415, now seen corresponding path program 136 times [2021-06-05 14:00:46,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:46,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128421202] [2021-06-05 14:00:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:46,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128421202] [2021-06-05 14:00:46,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128421202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870263532] [2021-06-05 14:00:46,409 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 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 14:00:46,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:46,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870263532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:46,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:46,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589000663] [2021-06-05 14:00:46,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:46,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:46,452 INFO L87 Difference]: Start difference. First operand 398 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:46,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:46,535 INFO L93 Difference]: Finished difference Result 544 states and 1417 transitions. [2021-06-05 14:00:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:46,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:46,536 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:00:46,536 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:00:46,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:00:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 398. [2021-06-05 14:00:46,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.7984886649874054) internal successors, (1111), 397 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1111 transitions. [2021-06-05 14:00:46,541 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1111 transitions. Word has length 18 [2021-06-05 14:00:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:46,541 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1111 transitions. [2021-06-05 14:00:46,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1111 transitions. [2021-06-05 14:00:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:46,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:46,542 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:46,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1733,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:46,758 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash 244072888, now seen corresponding path program 137 times [2021-06-05 14:00:46,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:46,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608876369] [2021-06-05 14:00:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608876369] [2021-06-05 14:00:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608876369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927097023] [2021-06-05 14:00:46,794 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 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 14:00:46,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927097023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:46,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821905985] [2021-06-05 14:00:46,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:46,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:46,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:46,839 INFO L87 Difference]: Start difference. First operand 398 states and 1111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:46,929 INFO L93 Difference]: Finished difference Result 600 states and 1559 transitions. [2021-06-05 14:00:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 18 [2021-06-05 14:00:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:46,930 INFO L225 Difference]: With dead ends: 600 [2021-06-05 14:00:46,930 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:00:46,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:00:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 351. [2021-06-05 14:00:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7857142857142856) internal successors, (975), 350 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 14:00:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 975 transitions. [2021-06-05 14:00:46,935 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 975 transitions. Word has length 18 [2021-06-05 14:00:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:46,935 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 975 transitions. [2021-06-05 14:00:46,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 14:00:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 975 transitions. [2021-06-05 14:00:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:46,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:46,935 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:47,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1734 [2021-06-05 14:00:47,145 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash 72502491, now seen corresponding path program 138 times [2021-06-05 14:00:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:47,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349551349] [2021-06-05 14:00:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:47,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349551349] [2021-06-05 14:00:47,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349551349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065384093] [2021-06-05 14:00:47,171 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 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 14:00:47,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:47,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065384093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:47,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:47,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675934057] [2021-06-05 14:00:47,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:47,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:47,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:47,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:47,218 INFO L87 Difference]: Start difference. First operand 351 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:47,251 INFO L93 Difference]: Finished difference Result 535 states and 1322 transitions. [2021-06-05 14:00:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-06-05 14:00:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:47,252 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:00:47,252 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 14:00:47,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 14:00:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2021-06-05 14:00:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.820441988950276) internal successors, (1021), 362 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1021 transitions. [2021-06-05 14:00:47,256 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1021 transitions. Word has length 18 [2021-06-05 14:00:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,256 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 1021 transitions. [2021-06-05 14:00:47,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1021 transitions. [2021-06-05 14:00:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:47,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,256 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:47,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1735 [2021-06-05 14:00:47,457 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash -704647108, now seen corresponding path program 139 times [2021-06-05 14:00:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:47,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823811721] [2021-06-05 14:00:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:47,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823811721] [2021-06-05 14:00:47,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823811721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938328120] [2021-06-05 14:00:47,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:00:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938328120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:47,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:47,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629666252] [2021-06-05 14:00:47,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:47,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:47,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:47,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:47,524 INFO L87 Difference]: Start difference. First operand 363 states and 1021 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:47,594 INFO L93 Difference]: Finished difference Result 446 states and 1156 transitions. [2021-06-05 14:00:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:47,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-06-05 14:00:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:47,595 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:00:47,595 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 14:00:47,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 14:00:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2021-06-05 14:00:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.82972972972973) internal successors, (1047), 370 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1047 transitions. [2021-06-05 14:00:47,599 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1047 transitions. Word has length 18 [2021-06-05 14:00:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,599 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1047 transitions. [2021-06-05 14:00:47,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 14:00:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1047 transitions. [2021-06-05 14:00:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:47,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,600 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:47,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1736,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:47,813 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash -163571971, now seen corresponding path program 140 times [2021-06-05 14:00:47,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:47,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119032226] [2021-06-05 14:00:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119032226] [2021-06-05 14:00:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119032226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624222443] [2021-06-05 14:00:47,841 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 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 14:00:47,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:47,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624222443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:47,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047657877] [2021-06-05 14:00:47,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:47,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:47,900 INFO L87 Difference]: Start difference. First operand 371 states and 1047 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:47,981 INFO L93 Difference]: Finished difference Result 529 states and 1322 transitions. [2021-06-05 14:00:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:47,981 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:00:47,982 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 14:00:47,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 14:00:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 371. [2021-06-05 14:00:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.8189189189189188) internal successors, (1043), 370 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1043 transitions. [2021-06-05 14:00:47,986 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1043 transitions. Word has length 18 [2021-06-05 14:00:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,986 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1043 transitions. [2021-06-05 14:00:47,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1043 transitions. [2021-06-05 14:00:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:47,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,986 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1737 [2021-06-05 14:00:48,187 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1054893602, now seen corresponding path program 141 times [2021-06-05 14:00:48,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112997287] [2021-06-05 14:00:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112997287] [2021-06-05 14:00:48,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112997287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970764213] [2021-06-05 14:00:48,218 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 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 14:00:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970764213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:48,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:48,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303266917] [2021-06-05 14:00:48,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:48,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:48,265 INFO L87 Difference]: Start difference. First operand 371 states and 1043 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:48,318 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2021-06-05 14:00:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18 [2021-06-05 14:00:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:48,319 INFO L225 Difference]: With dead ends: 464 [2021-06-05 14:00:48,319 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 14:00:48,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 14:00:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2021-06-05 14:00:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.7954545454545454) internal successors, (984), 352 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 984 transitions. [2021-06-05 14:00:48,322 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 984 transitions. Word has length 18 [2021-06-05 14:00:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:48,323 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 984 transitions. [2021-06-05 14:00:48,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 984 transitions. [2021-06-05 14:00:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:48,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:48,323 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:48,524 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -142565763, now seen corresponding path program 142 times [2021-06-05 14:00:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521991933] [2021-06-05 14:00:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521991933] [2021-06-05 14:00:48,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521991933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107740113] [2021-06-05 14:00:48,565 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 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 14:00:48,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:48,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107740113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:48,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071009099] [2021-06-05 14:00:48,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:48,620 INFO L87 Difference]: Start difference. First operand 353 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 14:00:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:48,716 INFO L93 Difference]: Finished difference Result 494 states and 1235 transitions. [2021-06-05 14:00:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 14:00:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:48,717 INFO L225 Difference]: With dead ends: 494 [2021-06-05 14:00:48,717 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:00:48,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:00:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 359. [2021-06-05 14:00:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.776536312849162) internal successors, (994), 358 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 994 transitions. [2021-06-05 14:00:48,721 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 994 transitions. Word has length 18 [2021-06-05 14:00:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:48,721 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 994 transitions. [2021-06-05 14:00:48,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 14:00:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 994 transitions. [2021-06-05 14:00:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:48,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:48,721 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:48,921 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1023384290, now seen corresponding path program 143 times [2021-06-05 14:00:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978062021] [2021-06-05 14:00:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978062021] [2021-06-05 14:00:48,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978062021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034202046] [2021-06-05 14:00:48,969 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 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 14:00:48,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034202046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:49,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:49,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897028680] [2021-06-05 14:00:49,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:49,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:49,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:49,022 INFO L87 Difference]: Start difference. First operand 359 states and 994 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 14:00:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:49,105 INFO L93 Difference]: Finished difference Result 473 states and 1180 transitions. [2021-06-05 14:00:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 14:00:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:49,106 INFO L225 Difference]: With dead ends: 473 [2021-06-05 14:00:49,106 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 14:00:49,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 14:00:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 306. [2021-06-05 14:00:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.7147540983606557) internal successors, (828), 305 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 828 transitions. [2021-06-05 14:00:49,109 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 828 transitions. Word has length 18 [2021-06-05 14:00:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:49,109 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 828 transitions. [2021-06-05 14:00:49,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 14:00:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 828 transitions. [2021-06-05 14:00:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:49,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:49,110 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:49,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1740,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:49,310 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash -585464903, now seen corresponding path program 144 times [2021-06-05 14:00:49,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:49,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253473448] [2021-06-05 14:00:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:49,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253473448] [2021-06-05 14:00:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253473448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842664676] [2021-06-05 14:00:49,350 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 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 14:00:49,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842664676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:49,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803686349] [2021-06-05 14:00:49,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:49,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:49,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:49,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:49,402 INFO L87 Difference]: Start difference. First operand 306 states and 828 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 14:00:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:49,473 INFO L93 Difference]: Finished difference Result 550 states and 1344 transitions. [2021-06-05 14:00:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 14:00:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:49,473 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:00:49,473 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:00:49,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:00:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 317. [2021-06-05 14:00:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6835443037974684) internal successors, (848), 316 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 848 transitions. [2021-06-05 14:00:49,477 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 848 transitions. Word has length 18 [2021-06-05 14:00:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:49,477 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 848 transitions. [2021-06-05 14:00:49,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 14:00:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 848 transitions. [2021-06-05 14:00:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:49,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:49,478 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:49,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-06-05 14:00:49,678 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash 459750648, now seen corresponding path program 145 times [2021-06-05 14:00:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:49,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492450649] [2021-06-05 14:00:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:49,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492450649] [2021-06-05 14:00:49,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492450649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179862960] [2021-06-05 14:00:49,713 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 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 14:00:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:49,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179862960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:49,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:49,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585360219] [2021-06-05 14:00:49,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:49,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:49,762 INFO L87 Difference]: Start difference. First operand 317 states and 848 transitions. Second operand has 12 states, 12 states have (on average 1.75) 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 14:00:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:49,880 INFO L93 Difference]: Finished difference Result 534 states and 1298 transitions. [2021-06-05 14:00:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:49,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) 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 18 [2021-06-05 14:00:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:49,881 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:00:49,881 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 14:00:49,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 14:00:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 351. [2021-06-05 14:00:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7085714285714286) internal successors, (948), 350 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 948 transitions. [2021-06-05 14:00:49,885 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 948 transitions. Word has length 18 [2021-06-05 14:00:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:49,885 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 948 transitions. [2021-06-05 14:00:49,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) 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 14:00:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 948 transitions. [2021-06-05 14:00:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:49,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:49,885 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:50,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1742 [2021-06-05 14:00:50,086 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1339860081, now seen corresponding path program 146 times [2021-06-05 14:00:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:50,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65740695] [2021-06-05 14:00:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:50,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65740695] [2021-06-05 14:00:50,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65740695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738389210] [2021-06-05 14:00:50,118 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 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 14:00:50,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:50,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738389210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:50,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814516674] [2021-06-05 14:00:50,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:50,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:50,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:50,164 INFO L87 Difference]: Start difference. First operand 351 states and 948 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 14:00:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:50,221 INFO L93 Difference]: Finished difference Result 539 states and 1303 transitions. [2021-06-05 14:00:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:50,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 14:00:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,222 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:00:50,222 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:00:50,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:00:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 380. [2021-06-05 14:00:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.7651715039577835) internal successors, (1048), 379 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1048 transitions. [2021-06-05 14:00:50,226 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1048 transitions. Word has length 18 [2021-06-05 14:00:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:50,226 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1048 transitions. [2021-06-05 14:00:50,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 14:00:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1048 transitions. [2021-06-05 14:00:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:50,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:50,227 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:50,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1743 [2021-06-05 14:00:50,427 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash 338306126, now seen corresponding path program 147 times [2021-06-05 14:00:50,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:50,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153282289] [2021-06-05 14:00:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:50,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153282289] [2021-06-05 14:00:50,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153282289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758913206] [2021-06-05 14:00:50,467 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 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 14:00:50,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:50,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758913206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:50,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:00:50,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706203556] [2021-06-05 14:00:50,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:50,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:50,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:50,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:50,515 INFO L87 Difference]: Start difference. First operand 380 states and 1048 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 14:00:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:50,632 INFO L93 Difference]: Finished difference Result 531 states and 1311 transitions. [2021-06-05 14:00:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 14:00:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,633 INFO L225 Difference]: With dead ends: 531 [2021-06-05 14:00:50,633 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 14:00:50,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 14:00:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2021-06-05 14:00:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.7933673469387754) internal successors, (1095), 392 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1095 transitions. [2021-06-05 14:00:50,638 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1095 transitions. Word has length 18 [2021-06-05 14:00:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:50,638 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1095 transitions. [2021-06-05 14:00:50,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 14:00:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1095 transitions. [2021-06-05 14:00:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:50,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:50,638 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:50,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1744 [2021-06-05 14:00:50,839 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 879381263, now seen corresponding path program 148 times [2021-06-05 14:00:50,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:50,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278430938] [2021-06-05 14:00:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:50,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278430938] [2021-06-05 14:00:50,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278430938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121509622] [2021-06-05 14:00:50,868 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 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 14:00:50,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121509622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:50,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:50,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308638528] [2021-06-05 14:00:50,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:50,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:50,911 INFO L87 Difference]: Start difference. First operand 393 states and 1095 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:50,979 INFO L93 Difference]: Finished difference Result 519 states and 1293 transitions. [2021-06-05 14:00:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:50,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,980 INFO L225 Difference]: With dead ends: 519 [2021-06-05 14:00:50,980 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:00:50,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:00:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 391. [2021-06-05 14:00:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.7974358974358973) internal successors, (1091), 390 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1091 transitions. [2021-06-05 14:00:50,985 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1091 transitions. Word has length 18 [2021-06-05 14:00:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:50,985 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1091 transitions. [2021-06-05 14:00:50,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1091 transitions. [2021-06-05 14:00:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:50,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:50,986 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:51,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1745,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:51,186 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash -756642866, now seen corresponding path program 149 times [2021-06-05 14:00:51,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:51,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544582255] [2021-06-05 14:00:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:51,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544582255] [2021-06-05 14:00:51,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544582255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945030130] [2021-06-05 14:00:51,221 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 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 14:00:51,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945030130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:51,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:51,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46546787] [2021-06-05 14:00:51,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:51,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:51,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:51,273 INFO L87 Difference]: Start difference. First operand 391 states and 1091 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:51,317 INFO L93 Difference]: Finished difference Result 530 states and 1322 transitions. [2021-06-05 14:00:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:51,318 INFO L225 Difference]: With dead ends: 530 [2021-06-05 14:00:51,318 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:00:51,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:00:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-06-05 14:00:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.78772378516624) internal successors, (1090), 391 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1090 transitions. [2021-06-05 14:00:51,322 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1090 transitions. Word has length 18 [2021-06-05 14:00:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:51,322 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1090 transitions. [2021-06-05 14:00:51,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1090 transitions. [2021-06-05 14:00:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:51,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:51,323 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:51,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:51,524 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:51,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2100886897, now seen corresponding path program 150 times [2021-06-05 14:00:51,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:51,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858168108] [2021-06-05 14:00:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:51,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858168108] [2021-06-05 14:00:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858168108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391745240] [2021-06-05 14:00:51,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:00:51,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:51,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391745240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:51,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:51,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216732284] [2021-06-05 14:00:51,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:51,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:51,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:51,606 INFO L87 Difference]: Start difference. First operand 392 states and 1090 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:51,695 INFO L93 Difference]: Finished difference Result 597 states and 1517 transitions. [2021-06-05 14:00:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:51,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 18 [2021-06-05 14:00:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:51,696 INFO L225 Difference]: With dead ends: 597 [2021-06-05 14:00:51,696 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 14:00:51,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 14:00:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 392. [2021-06-05 14:00:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.785166240409207) internal successors, (1089), 391 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1089 transitions. [2021-06-05 14:00:51,700 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1089 transitions. Word has length 18 [2021-06-05 14:00:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:51,701 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1089 transitions. [2021-06-05 14:00:51,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1089 transitions. [2021-06-05 14:00:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:51,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:51,701 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:51,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-06-05 14:00:51,902 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1055671346, now seen corresponding path program 151 times [2021-06-05 14:00:51,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:51,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481310685] [2021-06-05 14:00:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481310685] [2021-06-05 14:00:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481310685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067902650] [2021-06-05 14:00:51,941 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 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 14:00:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067902650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:51,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174168008] [2021-06-05 14:00:51,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:51,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:51,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:51,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:51,991 INFO L87 Difference]: Start difference. First operand 392 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:52,118 INFO L93 Difference]: Finished difference Result 529 states and 1361 transitions. [2021-06-05 14:00:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 18 [2021-06-05 14:00:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:52,119 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:00:52,119 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 14:00:52,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 14:00:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-06-05 14:00:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.78125) internal successors, (1068), 384 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1068 transitions. [2021-06-05 14:00:52,123 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1068 transitions. Word has length 18 [2021-06-05 14:00:52,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:52,123 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1068 transitions. [2021-06-05 14:00:52,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1068 transitions. [2021-06-05 14:00:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:52,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:52,123 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:52,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:52,324 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2079386357, now seen corresponding path program 152 times [2021-06-05 14:00:52,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:52,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079936472] [2021-06-05 14:00:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:52,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079936472] [2021-06-05 14:00:52,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079936472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871009999] [2021-06-05 14:00:52,352 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 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 14:00:52,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871009999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:52,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:52,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891844657] [2021-06-05 14:00:52,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:52,398 INFO L87 Difference]: Start difference. First operand 385 states and 1068 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:52,440 INFO L93 Difference]: Finished difference Result 612 states and 1535 transitions. [2021-06-05 14:00:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:52,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:52,441 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:00:52,441 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:00:52,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:00:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 441. [2021-06-05 14:00:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8545454545454545) internal successors, (1256), 440 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1256 transitions. [2021-06-05 14:00:52,446 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1256 transitions. Word has length 18 [2021-06-05 14:00:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:52,446 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1256 transitions. [2021-06-05 14:00:52,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1256 transitions. [2021-06-05 14:00:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:52,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:52,447 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:52,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:52,647 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:52,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1438431340, now seen corresponding path program 153 times [2021-06-05 14:00:52,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:52,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795611867] [2021-06-05 14:00:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795611867] [2021-06-05 14:00:52,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795611867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507597964] [2021-06-05 14:00:52,676 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 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 14:00:52,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:00:52,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:52,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507597964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:52,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:52,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522618914] [2021-06-05 14:00:52,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:52,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:52,720 INFO L87 Difference]: Start difference. First operand 441 states and 1256 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:52,800 INFO L93 Difference]: Finished difference Result 564 states and 1468 transitions. [2021-06-05 14:00:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:52,801 INFO L225 Difference]: With dead ends: 564 [2021-06-05 14:00:52,801 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:00:52,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:00:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 455. [2021-06-05 14:00:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8788546255506606) internal successors, (1307), 454 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1307 transitions. [2021-06-05 14:00:52,806 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1307 transitions. Word has length 18 [2021-06-05 14:00:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:52,806 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1307 transitions. [2021-06-05 14:00:52,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1307 transitions. [2021-06-05 14:00:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:52,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:52,807 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:53,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-05 14:00:53,009 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 490101481, now seen corresponding path program 154 times [2021-06-05 14:00:53,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:53,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631418871] [2021-06-05 14:00:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:53,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631418871] [2021-06-05 14:00:53,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631418871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688181074] [2021-06-05 14:00:53,036 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 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 14:00:53,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:53,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688181074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:53,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:53,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106316031] [2021-06-05 14:00:53,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:53,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:53,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:53,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:53,086 INFO L87 Difference]: Start difference. First operand 455 states and 1307 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:53,166 INFO L93 Difference]: Finished difference Result 609 states and 1555 transitions. [2021-06-05 14:00:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:53,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:53,167 INFO L225 Difference]: With dead ends: 609 [2021-06-05 14:00:53,167 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:00:53,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:00:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 455. [2021-06-05 14:00:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8766519823788546) internal successors, (1306), 454 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1306 transitions. [2021-06-05 14:00:53,172 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1306 transitions. Word has length 18 [2021-06-05 14:00:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:53,172 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1306 transitions. [2021-06-05 14:00:53,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1306 transitions. [2021-06-05 14:00:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:53,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:53,173 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:53,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1751 [2021-06-05 14:00:53,373 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:53,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1145922648, now seen corresponding path program 155 times [2021-06-05 14:00:53,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:53,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53221126] [2021-06-05 14:00:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:53,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53221126] [2021-06-05 14:00:53,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53221126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023635836] [2021-06-05 14:00:53,402 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 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 14:00:53,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:53,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023635836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:53,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:53,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021126065] [2021-06-05 14:00:53,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:53,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:53,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:53,450 INFO L87 Difference]: Start difference. First operand 455 states and 1306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:53,502 INFO L93 Difference]: Finished difference Result 584 states and 1520 transitions. [2021-06-05 14:00:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:53,503 INFO L225 Difference]: With dead ends: 584 [2021-06-05 14:00:53,503 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 14:00:53,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 14:00:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 459. [2021-06-05 14:00:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8777292576419216) internal successors, (1318), 458 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1318 transitions. [2021-06-05 14:00:53,509 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1318 transitions. Word has length 18 [2021-06-05 14:00:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:53,509 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1318 transitions. [2021-06-05 14:00:53,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1318 transitions. [2021-06-05 14:00:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:53,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:53,510 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:53,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1752,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:53,710 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1979506477, now seen corresponding path program 156 times [2021-06-05 14:00:53,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:53,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694595609] [2021-06-05 14:00:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694595609] [2021-06-05 14:00:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694595609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604116157] [2021-06-05 14:00:53,737 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 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 14:00:53,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:53,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:53,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604116157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:53,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:53,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407575563] [2021-06-05 14:00:53,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:53,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:53,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:53,784 INFO L87 Difference]: Start difference. First operand 459 states and 1318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:53,853 INFO L93 Difference]: Finished difference Result 652 states and 1678 transitions. [2021-06-05 14:00:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:53,854 INFO L225 Difference]: With dead ends: 652 [2021-06-05 14:00:53,854 INFO L226 Difference]: Without dead ends: 648 [2021-06-05 14:00:53,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-05 14:00:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 459. [2021-06-05 14:00:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8755458515283845) internal successors, (1317), 458 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1317 transitions. [2021-06-05 14:00:53,859 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1317 transitions. Word has length 18 [2021-06-05 14:00:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:53,859 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1317 transitions. [2021-06-05 14:00:53,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1317 transitions. [2021-06-05 14:00:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:53,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:53,860 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:54,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1753 [2021-06-05 14:00:54,062 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1088184846, now seen corresponding path program 157 times [2021-06-05 14:00:54,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:54,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645793568] [2021-06-05 14:00:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:54,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645793568] [2021-06-05 14:00:54,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645793568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840798463] [2021-06-05 14:00:54,107 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 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 14:00:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:54,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840798463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678604142] [2021-06-05 14:00:54,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:54,152 INFO L87 Difference]: Start difference. First operand 459 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:54,217 INFO L93 Difference]: Finished difference Result 559 states and 1507 transitions. [2021-06-05 14:00:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:54,218 INFO L225 Difference]: With dead ends: 559 [2021-06-05 14:00:54,218 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:00:54,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:00:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-06-05 14:00:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.882978723404255) internal successors, (1355), 470 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1355 transitions. [2021-06-05 14:00:54,223 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1355 transitions. Word has length 18 [2021-06-05 14:00:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:54,223 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1355 transitions. [2021-06-05 14:00:54,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 14:00:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1355 transitions. [2021-06-05 14:00:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:54,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:54,224 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:54,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1754,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:54,425 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash 906421097, now seen corresponding path program 158 times [2021-06-05 14:00:54,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:54,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906268493] [2021-06-05 14:00:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:54,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906268493] [2021-06-05 14:00:54,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906268493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116830533] [2021-06-05 14:00:54,453 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 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 14:00:54,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116830533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:54,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795023303] [2021-06-05 14:00:54,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:54,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:54,500 INFO L87 Difference]: Start difference. First operand 471 states and 1355 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 14:00:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:54,581 INFO L93 Difference]: Finished difference Result 682 states and 1750 transitions. [2021-06-05 14:00:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:54,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 14:00:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:54,582 INFO L225 Difference]: With dead ends: 682 [2021-06-05 14:00:54,582 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 14:00:54,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 14:00:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 482. [2021-06-05 14:00:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.9022869022869022) internal successors, (1396), 481 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1396 transitions. [2021-06-05 14:00:54,588 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1396 transitions. Word has length 18 [2021-06-05 14:00:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:54,588 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1396 transitions. [2021-06-05 14:00:54,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 14:00:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1396 transitions. [2021-06-05 14:00:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:54,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:54,588 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:54,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1755,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:54,789 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1626040424, now seen corresponding path program 159 times [2021-06-05 14:00:54,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:54,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063176447] [2021-06-05 14:00:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063176447] [2021-06-05 14:00:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063176447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590785175] [2021-06-05 14:00:54,818 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 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 14:00:54,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590785175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:54,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100502014] [2021-06-05 14:00:54,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:54,869 INFO L87 Difference]: Start difference. First operand 482 states and 1396 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 14:00:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:54,937 INFO L93 Difference]: Finished difference Result 581 states and 1569 transitions. [2021-06-05 14:00:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 14:00:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:54,938 INFO L225 Difference]: With dead ends: 581 [2021-06-05 14:00:54,938 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:00:54,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:00:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 483. [2021-06-05 14:00:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9024896265560165) internal successors, (1399), 482 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1399 transitions. [2021-06-05 14:00:54,943 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1399 transitions. Word has length 18 [2021-06-05 14:00:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:54,943 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1399 transitions. [2021-06-05 14:00:54,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 14:00:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1399 transitions. [2021-06-05 14:00:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:54,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:54,944 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:55,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1756 [2021-06-05 14:00:55,145 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1119694158, now seen corresponding path program 160 times [2021-06-05 14:00:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:55,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234071831] [2021-06-05 14:00:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:55,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:55,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234071831] [2021-06-05 14:00:55,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234071831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811274746] [2021-06-05 14:00:55,175 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 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 14:00:55,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:55,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:55,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:55,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811274746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:55,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487347715] [2021-06-05 14:00:55,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:55,225 INFO L87 Difference]: Start difference. First operand 483 states and 1399 transitions. Second operand has 11 states, 11 states have (on average 2.0) 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 14:00:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:55,272 INFO L93 Difference]: Finished difference Result 540 states and 1521 transitions. [2021-06-05 14:00:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:00:55,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) 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 18 [2021-06-05 14:00:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:55,273 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:00:55,273 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:00:55,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:00:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 503. [2021-06-05 14:00:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.902390438247012) internal successors, (1457), 502 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1457 transitions. [2021-06-05 14:00:55,277 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1457 transitions. Word has length 18 [2021-06-05 14:00:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:55,278 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1457 transitions. [2021-06-05 14:00:55,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) 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 14:00:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1457 transitions. [2021-06-05 14:00:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:55,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:55,278 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:55,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:55,479 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:55,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1557613545, now seen corresponding path program 161 times [2021-06-05 14:00:55,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:55,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465135171] [2021-06-05 14:00:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465135171] [2021-06-05 14:00:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465135171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783010011] [2021-06-05 14:00:55,513 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 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 14:00:55,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783010011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:55,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:55,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062799968] [2021-06-05 14:00:55,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:55,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:55,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:55,563 INFO L87 Difference]: Start difference. First operand 503 states and 1457 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:55,650 INFO L93 Difference]: Finished difference Result 774 states and 2053 transitions. [2021-06-05 14:00:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 18 [2021-06-05 14:00:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:55,651 INFO L225 Difference]: With dead ends: 774 [2021-06-05 14:00:55,651 INFO L226 Difference]: Without dead ends: 764 [2021-06-05 14:00:55,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-06-05 14:00:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 506. [2021-06-05 14:00:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-06-05 14:00:55,657 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-06-05 14:00:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:55,657 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-06-05 14:00:55,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-06-05 14:00:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:55,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:55,657 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:55,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:55,858 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1692138200, now seen corresponding path program 162 times [2021-06-05 14:00:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:55,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99549862] [2021-06-05 14:00:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99549862] [2021-06-05 14:00:55,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99549862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761119745] [2021-06-05 14:00:55,896 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 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 14:00:55,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761119745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:55,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:55,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566192509] [2021-06-05 14:00:55,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:55,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:55,947 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:56,041 INFO L93 Difference]: Finished difference Result 573 states and 1584 transitions. [2021-06-05 14:00:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 18 [2021-06-05 14:00:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:56,042 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:00:56,042 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 14:00:56,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 14:00:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 506. [2021-06-05 14:00:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-06-05 14:00:56,047 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-06-05 14:00:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-06-05 14:00:56,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-06-05 14:00:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:56,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:56,048 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:56,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:56,248 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 712642093, now seen corresponding path program 163 times [2021-06-05 14:00:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:56,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364797243] [2021-06-05 14:00:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:56,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364797243] [2021-06-05 14:00:56,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364797243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217215947] [2021-06-05 14:00:56,286 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 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 14:00:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217215947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606488881] [2021-06-05 14:00:56,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:56,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:56,342 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:56,390 INFO L93 Difference]: Finished difference Result 683 states and 1838 transitions. [2021-06-05 14:00:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 18 [2021-06-05 14:00:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:56,391 INFO L225 Difference]: With dead ends: 683 [2021-06-05 14:00:56,391 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 14:00:56,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 14:00:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 504. [2021-06-05 14:00:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9025844930417497) internal successors, (1460), 503 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1460 transitions. [2021-06-05 14:00:56,396 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1460 transitions. Word has length 18 [2021-06-05 14:00:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:56,396 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1460 transitions. [2021-06-05 14:00:56,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1460 transitions. [2021-06-05 14:00:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:56,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:56,397 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:56,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-06-05 14:00:56,597 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1335371918, now seen corresponding path program 164 times [2021-06-05 14:00:56,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:56,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749453764] [2021-06-05 14:00:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:56,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749453764] [2021-06-05 14:00:56,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749453764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968901479] [2021-06-05 14:00:56,636 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 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 14:00:56,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:56,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:00:56,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968901479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:56,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:00:56,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168255635] [2021-06-05 14:00:56,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:00:56,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:00:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:56,686 INFO L87 Difference]: Start difference. First operand 504 states and 1460 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:56,795 INFO L93 Difference]: Finished difference Result 652 states and 1786 transitions. [2021-06-05 14:00:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 18 [2021-06-05 14:00:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:56,796 INFO L225 Difference]: With dead ends: 652 [2021-06-05 14:00:56,796 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 14:00:56,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 14:00:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 525. [2021-06-05 14:00:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.895038167938931) internal successors, (1517), 524 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1517 transitions. [2021-06-05 14:00:56,802 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1517 transitions. Word has length 18 [2021-06-05 14:00:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:56,802 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1517 transitions. [2021-06-05 14:00:56,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) 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 14:00:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1517 transitions. [2021-06-05 14:00:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:00:56,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:56,803 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:57,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-05 14:00:57,003 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:57,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1154319608, now seen corresponding path program 165 times [2021-06-05 14:00:57,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:57,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352245691] [2021-06-05 14:00:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:57,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352245691] [2021-06-05 14:00:57,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352245691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953557206] [2021-06-05 14:00:57,102 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 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 14:00:57,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:57,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:57,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:00:57,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:57,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:00:57,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:57,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:57,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:57,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:00:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:57,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953557206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:00:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129821972] [2021-06-05 14:00:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:00:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:00:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:57,557 INFO L87 Difference]: Start difference. First operand 525 states and 1517 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:57,849 INFO L93 Difference]: Finished difference Result 604 states and 1671 transitions. [2021-06-05 14:00:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:00:57,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:00:57,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:57,850 INFO L225 Difference]: With dead ends: 604 [2021-06-05 14:00:57,850 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:00:57,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:00:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:00:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 540. [2021-06-05 14:00:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.8923933209647497) internal successors, (1559), 539 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1559 transitions. [2021-06-05 14:00:57,855 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1559 transitions. Word has length 19 [2021-06-05 14:00:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:57,856 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1559 transitions. [2021-06-05 14:00:57,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1559 transitions. [2021-06-05 14:00:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:00:57,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:57,856 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1762 [2021-06-05 14:00:58,057 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1640517070, now seen corresponding path program 166 times [2021-06-05 14:00:58,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:58,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384106611] [2021-06-05 14:00:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:58,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384106611] [2021-06-05 14:00:58,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384106611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315442112] [2021-06-05 14:00:58,126 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 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 14:00:58,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:58,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:58,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:00:58,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:58,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:58,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:00:58,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:58,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:58,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:58,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:00:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315442112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:58,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:00:58,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623826223] [2021-06-05 14:00:58,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:00:58,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:00:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:58,507 INFO L87 Difference]: Start difference. First operand 540 states and 1559 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:00:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:58,777 INFO L93 Difference]: Finished difference Result 625 states and 1734 transitions. [2021-06-05 14:00:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:00:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:58,778 INFO L225 Difference]: With dead ends: 625 [2021-06-05 14:00:58,778 INFO L226 Difference]: Without dead ends: 609 [2021-06-05 14:00:58,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:00:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-05 14:00:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 556. [2021-06-05 14:00:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-06-05 14:00:58,783 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-06-05 14:00:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:58,783 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-06-05 14:00:58,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:00:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-06-05 14:00:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:00:58,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:58,784 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:58,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-06-05 14:00:58,984 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -781642540, now seen corresponding path program 167 times [2021-06-05 14:00:58,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:58,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15214995] [2021-06-05 14:00:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:59,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:59,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15214995] [2021-06-05 14:00:59,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15214995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:59,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438009330] [2021-06-05 14:00:59,051 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 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 14:00:59,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:59,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:59,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:00:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:59,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:59,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:00:59,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:59,540 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:00:59,541 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:00:59,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:00:59,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:00:59,740 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:00:59,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:59,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:00:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:59,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438009330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:59,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:59,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:00:59,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970030952] [2021-06-05 14:00:59,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:00:59,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:00:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:59,763 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:00,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:00,077 INFO L93 Difference]: Finished difference Result 644 states and 1778 transitions. [2021-06-05 14:01:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:00,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:00,079 INFO L225 Difference]: With dead ends: 644 [2021-06-05 14:01:00,079 INFO L226 Difference]: Without dead ends: 634 [2021-06-05 14:01:00,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-05 14:01:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 556. [2021-06-05 14:01:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-06-05 14:01:00,084 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-06-05 14:01:00,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:00,084 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-06-05 14:01:00,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-06-05 14:01:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:00,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:00,085 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:00,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1911,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:00,301 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1146496824, now seen corresponding path program 168 times [2021-06-05 14:01:00,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:00,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542740502] [2021-06-05 14:01:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:00,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:00,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542740502] [2021-06-05 14:01:00,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542740502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:00,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392366235] [2021-06-05 14:01:00,369 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 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 14:01:00,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:01:00,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:00,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:00,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:00,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:00,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:00,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:00,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:00,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:00,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392366235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:00,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:00,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:00,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665409092] [2021-06-05 14:01:00,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:00,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:00,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:00,760 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:01,004 INFO L93 Difference]: Finished difference Result 654 states and 1848 transitions. [2021-06-05 14:01:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:01,005 INFO L225 Difference]: With dead ends: 654 [2021-06-05 14:01:01,005 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 14:01:01,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 14:01:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 585. [2021-06-05 14:01:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9366438356164384) internal successors, (1715), 584 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1715 transitions. [2021-06-05 14:01:01,012 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1715 transitions. Word has length 19 [2021-06-05 14:01:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:01,012 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1715 transitions. [2021-06-05 14:01:01,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1715 transitions. [2021-06-05 14:01:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:01,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:01,013 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:01,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-06-05 14:01:01,213 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash -287622294, now seen corresponding path program 169 times [2021-06-05 14:01:01,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:01,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331799994] [2021-06-05 14:01:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:01,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:01,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331799994] [2021-06-05 14:01:01,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331799994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:01,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819053024] [2021-06-05 14:01:01,281 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 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 14:01:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:01,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:01,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:01,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:01,774 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:01,774 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:01,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:01,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:01,891 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:01,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:01,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:01,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819053024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:01,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:01,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:01,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209721951] [2021-06-05 14:01:01,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:01,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:01,916 INFO L87 Difference]: Start difference. First operand 585 states and 1715 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:02,269 INFO L93 Difference]: Finished difference Result 690 states and 1918 transitions. [2021-06-05 14:01:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:02,270 INFO L225 Difference]: With dead ends: 690 [2021-06-05 14:01:02,270 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 14:01:02,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:01:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 14:01:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 583. [2021-06-05 14:01:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.929553264604811) internal successors, (1705), 582 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1705 transitions. [2021-06-05 14:01:02,276 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1705 transitions. Word has length 19 [2021-06-05 14:01:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:02,276 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1705 transitions. [2021-06-05 14:01:02,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1705 transitions. [2021-06-05 14:01:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:02,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:02,277 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:02,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-06-05 14:01:02,478 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:02,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1422991014, now seen corresponding path program 170 times [2021-06-05 14:01:02,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:02,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104686190] [2021-06-05 14:01:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:02,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104686190] [2021-06-05 14:01:02,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104686190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330784382] [2021-06-05 14:01:02,546 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 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 14:01:02,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:02,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:02,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:02,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:02,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:02,975 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:02,975 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:03,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:03,127 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:03,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:03,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:03,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330784382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:03,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:03,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323674844] [2021-06-05 14:01:03,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:03,151 INFO L87 Difference]: Start difference. First operand 583 states and 1705 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:03,506 INFO L93 Difference]: Finished difference Result 643 states and 1827 transitions. [2021-06-05 14:01:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:03,508 INFO L225 Difference]: With dead ends: 643 [2021-06-05 14:01:03,508 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:01:03,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:01:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:01:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 585. [2021-06-05 14:01:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9297945205479454) internal successors, (1711), 584 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1711 transitions. [2021-06-05 14:01:03,514 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1711 transitions. Word has length 19 [2021-06-05 14:01:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:03,514 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1711 transitions. [2021-06-05 14:01:03,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1711 transitions. [2021-06-05 14:01:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:03,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:03,515 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:03,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:03,716 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1095619830, now seen corresponding path program 171 times [2021-06-05 14:01:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:03,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377899375] [2021-06-05 14:01:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:01:03,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:03,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377899375] [2021-06-05 14:01:03,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377899375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:03,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558880400] [2021-06-05 14:01:03,776 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 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 14:01:03,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:01:03,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:03,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:04,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:04,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:04,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:04,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:04,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:04,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:04,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558880400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:04,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:04,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:01:04,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259382458] [2021-06-05 14:01:04,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:04,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:04,288 INFO L87 Difference]: Start difference. First operand 585 states and 1711 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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 14:01:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:04,473 INFO L93 Difference]: Finished difference Result 619 states and 1761 transitions. [2021-06-05 14:01:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-06-05 14:01:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:04,474 INFO L225 Difference]: With dead ends: 619 [2021-06-05 14:01:04,474 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 14:01:04,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:01:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 14:01:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 585. [2021-06-05 14:01:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9263698630136985) internal successors, (1709), 584 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1709 transitions. [2021-06-05 14:01:04,480 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1709 transitions. Word has length 19 [2021-06-05 14:01:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:04,480 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1709 transitions. [2021-06-05 14:01:04,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 14:01:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1709 transitions. [2021-06-05 14:01:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:04,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:04,481 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:04,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2260 [2021-06-05 14:01:04,681 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash -980106122, now seen corresponding path program 172 times [2021-06-05 14:01:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:04,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820908860] [2021-06-05 14:01:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:04,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:04,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820908860] [2021-06-05 14:01:04,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820908860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:04,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125798675] [2021-06-05 14:01:04,746 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 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 14:01:04,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:04,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:04,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:04,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:05,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:05,185 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:05,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:05,528 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:05,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:05,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:05,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125798675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:05,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:05,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:05,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791505183] [2021-06-05 14:01:05,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:05,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:05,552 INFO L87 Difference]: Start difference. First operand 585 states and 1709 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:05,933 INFO L93 Difference]: Finished difference Result 693 states and 1917 transitions. [2021-06-05 14:01:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:05,935 INFO L225 Difference]: With dead ends: 693 [2021-06-05 14:01:05,935 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 14:01:05,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:01:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 14:01:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 588. [2021-06-05 14:01:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.9165247018739353) internal successors, (1712), 587 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1712 transitions. [2021-06-05 14:01:05,940 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1712 transitions. Word has length 19 [2021-06-05 14:01:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:05,941 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1712 transitions. [2021-06-05 14:01:05,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1712 transitions. [2021-06-05 14:01:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:05,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:05,941 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:06,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-06-05 14:01:06,142 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1283228914, now seen corresponding path program 173 times [2021-06-05 14:01:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:06,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749726517] [2021-06-05 14:01:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749726517] [2021-06-05 14:01:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749726517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439252724] [2021-06-05 14:01:06,215 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 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 14:01:06,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:06,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:06,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:06,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:06,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:06,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:06,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:06,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:06,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:06,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439252724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:06,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:06,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:06,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324291033] [2021-06-05 14:01:06,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:06,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:06,635 INFO L87 Difference]: Start difference. First operand 588 states and 1712 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:06,854 INFO L93 Difference]: Finished difference Result 698 states and 1984 transitions. [2021-06-05 14:01:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:06,855 INFO L225 Difference]: With dead ends: 698 [2021-06-05 14:01:06,855 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 14:01:06,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 14:01:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 625. [2021-06-05 14:01:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.948717948717949) internal successors, (1840), 624 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1840 transitions. [2021-06-05 14:01:06,861 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1840 transitions. Word has length 19 [2021-06-05 14:01:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:06,861 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1840 transitions. [2021-06-05 14:01:06,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1840 transitions. [2021-06-05 14:01:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:06,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:06,862 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:07,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:07,063 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2142103444, now seen corresponding path program 174 times [2021-06-05 14:01:07,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:07,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628907699] [2021-06-05 14:01:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:07,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:07,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628907699] [2021-06-05 14:01:07,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628907699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:07,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136306829] [2021-06-05 14:01:07,128 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 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 14:01:07,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:07,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:01:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:07,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:07,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:07,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:07,556 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:07,556 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:07,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:07,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:07,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:07,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:07,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:07,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136306829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:07,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:07,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:07,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962360306] [2021-06-05 14:01:07,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:07,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:07,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:07,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:07,799 INFO L87 Difference]: Start difference. First operand 625 states and 1840 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:08,319 INFO L93 Difference]: Finished difference Result 768 states and 2131 transitions. [2021-06-05 14:01:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:01:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:08,320 INFO L225 Difference]: With dead ends: 768 [2021-06-05 14:01:08,320 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 14:01:08,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:01:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 14:01:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 627. [2021-06-05 14:01:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.9472843450479234) internal successors, (1845), 626 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1845 transitions. [2021-06-05 14:01:08,326 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1845 transitions. Word has length 19 [2021-06-05 14:01:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:08,326 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1845 transitions. [2021-06-05 14:01:08,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1845 transitions. [2021-06-05 14:01:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:08,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:08,327 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:08,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2531 [2021-06-05 14:01:08,527 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash -442250544, now seen corresponding path program 175 times [2021-06-05 14:01:08,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:08,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574980035] [2021-06-05 14:01:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:08,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:08,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574980035] [2021-06-05 14:01:08,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574980035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:08,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765285848] [2021-06-05 14:01:08,611 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 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 14:01:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:08,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:08,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:08,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:08,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:09,101 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:09,101 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:09,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:09,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:09,450 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:09,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:09,451 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:09,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765285848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:09,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:09,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:09,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516231831] [2021-06-05 14:01:09,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:09,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:09,474 INFO L87 Difference]: Start difference. First operand 627 states and 1845 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:10,002 INFO L93 Difference]: Finished difference Result 816 states and 2235 transitions. [2021-06-05 14:01:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:01:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:10,003 INFO L225 Difference]: With dead ends: 816 [2021-06-05 14:01:10,003 INFO L226 Difference]: Without dead ends: 783 [2021-06-05 14:01:10,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:01:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-05 14:01:10,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 619. [2021-06-05 14:01:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.9352750809061487) internal successors, (1814), 618 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1814 transitions. [2021-06-05 14:01:10,010 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1814 transitions. Word has length 19 [2021-06-05 14:01:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:10,010 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 1814 transitions. [2021-06-05 14:01:10,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1814 transitions. [2021-06-05 14:01:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:10,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:10,011 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:10,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2634,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:10,211 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1047154452, now seen corresponding path program 176 times [2021-06-05 14:01:10,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:10,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138443583] [2021-06-05 14:01:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:10,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138443583] [2021-06-05 14:01:10,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138443583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:10,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85100611] [2021-06-05 14:01:10,285 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 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 14:01:10,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:10,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:10,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:10,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:10,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:10,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:10,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:10,854 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:10,855 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:10,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:10,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:10,947 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:10,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:10,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:10,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85100611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:10,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:10,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:10,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006432437] [2021-06-05 14:01:10,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:10,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:10,971 INFO L87 Difference]: Start difference. First operand 619 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:11,348 INFO L93 Difference]: Finished difference Result 731 states and 2045 transitions. [2021-06-05 14:01:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:01:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:11,349 INFO L225 Difference]: With dead ends: 731 [2021-06-05 14:01:11,349 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 14:01:11,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:01:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 14:01:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 621. [2021-06-05 14:01:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.935483870967742) internal successors, (1820), 620 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1820 transitions. [2021-06-05 14:01:11,355 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1820 transitions. Word has length 19 [2021-06-05 14:01:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:11,355 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1820 transitions. [2021-06-05 14:01:11,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1820 transitions. [2021-06-05 14:01:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:11,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:11,356 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:11,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2779,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:11,556 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash -385947354, now seen corresponding path program 177 times [2021-06-05 14:01:11,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:11,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478407709] [2021-06-05 14:01:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:01:11,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478407709] [2021-06-05 14:01:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478407709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728128535] [2021-06-05 14:01:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:01:11,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:01:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:11,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:11,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:11,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:12,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:12,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:12,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:12,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:12,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728128535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:12,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:12,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:01:12,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865236931] [2021-06-05 14:01:12,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:12,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:12,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:12,029 INFO L87 Difference]: Start difference. First operand 621 states and 1820 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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 14:01:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:12,232 INFO L93 Difference]: Finished difference Result 649 states and 1861 transitions. [2021-06-05 14:01:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:12,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-06-05 14:01:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:12,233 INFO L225 Difference]: With dead ends: 649 [2021-06-05 14:01:12,233 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:01:12,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:01:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:01:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 621. [2021-06-05 14:01:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.9338709677419357) internal successors, (1819), 620 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 14:01:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1819 transitions. [2021-06-05 14:01:12,239 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1819 transitions. Word has length 19 [2021-06-05 14:01:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:12,239 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1819 transitions. [2021-06-05 14:01:12,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 14:01:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1819 transitions. [2021-06-05 14:01:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:12,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:12,240 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:12,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2886,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:12,440 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash -434412732, now seen corresponding path program 178 times [2021-06-05 14:01:12,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:12,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754650033] [2021-06-05 14:01:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:12,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:12,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754650033] [2021-06-05 14:01:12,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754650033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:12,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146468669] [2021-06-05 14:01:12,513 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 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 14:01:12,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:12,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:12,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:12,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:12,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:12,971 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:12,972 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:12,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:13,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:13,252 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:13,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:13,252 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146468669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:13,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:13,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956124393] [2021-06-05 14:01:13,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:13,276 INFO L87 Difference]: Start difference. First operand 621 states and 1819 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:13,790 INFO L93 Difference]: Finished difference Result 789 states and 2195 transitions. [2021-06-05 14:01:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:13,791 INFO L225 Difference]: With dead ends: 789 [2021-06-05 14:01:13,791 INFO L226 Difference]: Without dead ends: 779 [2021-06-05 14:01:13,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:01:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-06-05 14:01:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 622. [2021-06-05 14:01:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.9355877616747184) internal successors, (1823), 621 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1823 transitions. [2021-06-05 14:01:13,798 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1823 transitions. Word has length 19 [2021-06-05 14:01:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:13,798 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1823 transitions. [2021-06-05 14:01:13,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1823 transitions. [2021-06-05 14:01:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:13,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:13,799 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:14,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:14,015 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:14,015 INFO L82 PathProgramCache]: Analyzing trace with hash -704684536, now seen corresponding path program 179 times [2021-06-05 14:01:14,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:14,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624207407] [2021-06-05 14:01:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:14,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624207407] [2021-06-05 14:01:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624207407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484396502] [2021-06-05 14:01:14,080 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 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 14:01:14,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:14,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:14,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:14,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:14,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:14,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:14,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:14,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:14,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:14,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484396502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:14,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:14,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:14,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376951500] [2021-06-05 14:01:14,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:14,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:14,455 INFO L87 Difference]: Start difference. First operand 622 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:14,777 INFO L93 Difference]: Finished difference Result 716 states and 2072 transitions. [2021-06-05 14:01:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:14,778 INFO L225 Difference]: With dead ends: 716 [2021-06-05 14:01:14,778 INFO L226 Difference]: Without dead ends: 700 [2021-06-05 14:01:14,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-05 14:01:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 661. [2021-06-05 14:01:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9681818181818183) internal successors, (1959), 660 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1959 transitions. [2021-06-05 14:01:14,785 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1959 transitions. Word has length 19 [2021-06-05 14:01:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:14,785 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1959 transitions. [2021-06-05 14:01:14,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1959 transitions. [2021-06-05 14:01:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:14,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:14,786 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:15,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 14:01:15,002 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:15,002 INFO L82 PathProgramCache]: Analyzing trace with hash 154189994, now seen corresponding path program 180 times [2021-06-05 14:01:15,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:15,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515724000] [2021-06-05 14:01:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:15,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:15,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515724000] [2021-06-05 14:01:15,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515724000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233428359] [2021-06-05 14:01:15,069 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 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 14:01:15,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:15,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:01:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:15,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:15,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:15,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:15,596 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:15,597 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:15,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:15,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:15,736 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:15,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:15,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:15,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233428359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:15,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:15,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:15,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483303795] [2021-06-05 14:01:15,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:15,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:15,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:15,759 INFO L87 Difference]: Start difference. First operand 661 states and 1959 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:16,379 INFO L93 Difference]: Finished difference Result 807 states and 2279 transitions. [2021-06-05 14:01:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:01:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:16,380 INFO L225 Difference]: With dead ends: 807 [2021-06-05 14:01:16,380 INFO L226 Difference]: Without dead ends: 781 [2021-06-05 14:01:16,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:01:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-05 14:01:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 667. [2021-06-05 14:01:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.9684684684684686) internal successors, (1977), 666 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1977 transitions. [2021-06-05 14:01:16,387 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1977 transitions. Word has length 19 [2021-06-05 14:01:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:16,387 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 1977 transitions. [2021-06-05 14:01:16,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1977 transitions. [2021-06-05 14:01:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:16,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:16,388 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:16,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3137 [2021-06-05 14:01:16,589 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:16,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1864803302, now seen corresponding path program 181 times [2021-06-05 14:01:16,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:16,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672351311] [2021-06-05 14:01:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:16,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:16,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672351311] [2021-06-05 14:01:16,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672351311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:16,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638212188] [2021-06-05 14:01:16,654 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 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 14:01:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:16,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:16,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:16,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:17,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:17,132 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:17,132 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:17,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:17,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:17,265 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:17,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:17,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:17,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638212188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:17,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:17,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:17,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878120436] [2021-06-05 14:01:17,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:17,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:17,301 INFO L87 Difference]: Start difference. First operand 667 states and 1977 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:17,651 INFO L93 Difference]: Finished difference Result 766 states and 2183 transitions. [2021-06-05 14:01:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:01:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:17,652 INFO L225 Difference]: With dead ends: 766 [2021-06-05 14:01:17,652 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 14:01:17,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:01:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 14:01:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 675. [2021-06-05 14:01:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.970326409495549) internal successors, (2002), 674 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2002 transitions. [2021-06-05 14:01:17,659 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2002 transitions. Word has length 19 [2021-06-05 14:01:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:17,659 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2002 transitions. [2021-06-05 14:01:17,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2002 transitions. [2021-06-05 14:01:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:17,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:17,659 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:17,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:17,860 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:17,860 INFO L82 PathProgramCache]: Analyzing trace with hash -940758998, now seen corresponding path program 182 times [2021-06-05 14:01:17,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:17,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763925006] [2021-06-05 14:01:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:17,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:17,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763925006] [2021-06-05 14:01:17,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763925006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:17,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819088726] [2021-06-05 14:01:17,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:01:17,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:17,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:18,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:18,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:18,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:18,423 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:18,424 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:18,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:18,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:18,514 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:18,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:18,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:18,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819088726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:18,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:18,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:18,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237923576] [2021-06-05 14:01:18,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:18,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:18,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:18,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:18,539 INFO L87 Difference]: Start difference. First operand 675 states and 2002 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:19,054 INFO L93 Difference]: Finished difference Result 837 states and 2353 transitions. [2021-06-05 14:01:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:01:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:19,055 INFO L225 Difference]: With dead ends: 837 [2021-06-05 14:01:19,055 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 14:01:19,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 479.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:01:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 14:01:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 670. [2021-06-05 14:01:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.968609865470852) internal successors, (1986), 669 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1986 transitions. [2021-06-05 14:01:19,062 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1986 transitions. Word has length 19 [2021-06-05 14:01:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:19,062 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 1986 transitions. [2021-06-05 14:01:19,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1986 transitions. [2021-06-05 14:01:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:19,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:19,063 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:19,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:19,263 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2013844378, now seen corresponding path program 183 times [2021-06-05 14:01:19,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:19,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947882252] [2021-06-05 14:01:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:19,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:19,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947882252] [2021-06-05 14:01:19,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947882252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:19,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858986841] [2021-06-05 14:01:19,339 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 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 14:01:19,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:01:19,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:19,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:19,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:19,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:19,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:19,853 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:19,853 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:19,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:19,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:19,955 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:19,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:19,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:19,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858986841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:19,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:19,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:19,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478517497] [2021-06-05 14:01:19,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:19,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:19,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:19,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:19,979 INFO L87 Difference]: Start difference. First operand 670 states and 1986 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:20,363 INFO L93 Difference]: Finished difference Result 781 states and 2228 transitions. [2021-06-05 14:01:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:01:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:20,364 INFO L225 Difference]: With dead ends: 781 [2021-06-05 14:01:20,364 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 14:01:20,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:01:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 14:01:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 671. [2021-06-05 14:01:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.9686567164179105) internal successors, (1989), 670 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1989 transitions. [2021-06-05 14:01:20,371 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1989 transitions. Word has length 19 [2021-06-05 14:01:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:20,372 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1989 transitions. [2021-06-05 14:01:20,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1989 transitions. [2021-06-05 14:01:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:20,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:20,372 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:20,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:20,581 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -806481870, now seen corresponding path program 184 times [2021-06-05 14:01:20,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:20,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68000647] [2021-06-05 14:01:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:20,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:20,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68000647] [2021-06-05 14:01:20,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68000647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:20,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076474052] [2021-06-05 14:01:20,650 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 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 14:01:20,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:20,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:20,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:20,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:20,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:21,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:21,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:21,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:21,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:21,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076474052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:21,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:21,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:21,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001407520] [2021-06-05 14:01:21,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:21,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:21,174 INFO L87 Difference]: Start difference. First operand 671 states and 1989 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) 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 14:01:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:21,428 INFO L93 Difference]: Finished difference Result 702 states and 2034 transitions. [2021-06-05 14:01:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) 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 19 [2021-06-05 14:01:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:21,429 INFO L225 Difference]: With dead ends: 702 [2021-06-05 14:01:21,429 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 14:01:21,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:01:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 14:01:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 671. [2021-06-05 14:01:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.967164179104478) internal successors, (1988), 670 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1988 transitions. [2021-06-05 14:01:21,435 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1988 transitions. Word has length 19 [2021-06-05 14:01:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:21,435 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1988 transitions. [2021-06-05 14:01:21,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) 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 14:01:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1988 transitions. [2021-06-05 14:01:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:21,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:21,436 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:21,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3561,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:21,638 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 153350736, now seen corresponding path program 185 times [2021-06-05 14:01:21,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:21,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092062781] [2021-06-05 14:01:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:21,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:21,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092062781] [2021-06-05 14:01:21,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092062781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:21,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614442173] [2021-06-05 14:01:21,707 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 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 14:01:21,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:01:21,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:21,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:21,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:21,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:21,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:22,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:22,153 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:22,153 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:22,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:22,307 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:22,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:22,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:22,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614442173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:22,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:22,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372928576] [2021-06-05 14:01:22,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:22,330 INFO L87 Difference]: Start difference. First operand 671 states and 1988 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:22,772 INFO L93 Difference]: Finished difference Result 827 states and 2298 transitions. [2021-06-05 14:01:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:01:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:22,774 INFO L225 Difference]: With dead ends: 827 [2021-06-05 14:01:22,774 INFO L226 Difference]: Without dead ends: 805 [2021-06-05 14:01:22,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:01:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-05 14:01:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 670. [2021-06-05 14:01:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.9626307922272046) internal successors, (1982), 669 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1982 transitions. [2021-06-05 14:01:22,781 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1982 transitions. Word has length 19 [2021-06-05 14:01:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 1982 transitions. [2021-06-05 14:01:22,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1982 transitions. [2021-06-05 14:01:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:22,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:22,782 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:22,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3637 [2021-06-05 14:01:22,998 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:22,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1642755732, now seen corresponding path program 186 times [2021-06-05 14:01:22,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:22,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469330346] [2021-06-05 14:01:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469330346] [2021-06-05 14:01:23,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469330346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138200915] [2021-06-05 14:01:23,071 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 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 14:01:23,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:01:23,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:23,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:23,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:23,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:23,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:23,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:23,615 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:23,615 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:23,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:23,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:23,737 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:23,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:23,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138200915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:23,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:23,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098828827] [2021-06-05 14:01:23,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:23,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:23,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:23,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:23,760 INFO L87 Difference]: Start difference. First operand 670 states and 1982 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:24,280 INFO L93 Difference]: Finished difference Result 855 states and 2368 transitions. [2021-06-05 14:01:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:01:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:24,282 INFO L225 Difference]: With dead ends: 855 [2021-06-05 14:01:24,282 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 14:01:24,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:01:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 14:01:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 662. [2021-06-05 14:01:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.9531013615733737) internal successors, (1952), 661 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1952 transitions. [2021-06-05 14:01:24,289 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1952 transitions. Word has length 19 [2021-06-05 14:01:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:24,289 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 1952 transitions. [2021-06-05 14:01:24,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1952 transitions. [2021-06-05 14:01:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:24,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:24,289 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:24,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3734,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:24,490 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash 569670352, now seen corresponding path program 187 times [2021-06-05 14:01:24,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:24,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025125154] [2021-06-05 14:01:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:24,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025125154] [2021-06-05 14:01:24,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025125154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317755547] [2021-06-05 14:01:24,567 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 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 14:01:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:24,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:24,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:24,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:25,091 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:25,091 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:25,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:25,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:25,189 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:25,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:25,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:25,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317755547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:25,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:25,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325051415] [2021-06-05 14:01:25,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:25,218 INFO L87 Difference]: Start difference. First operand 662 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:25,597 INFO L93 Difference]: Finished difference Result 809 states and 2278 transitions. [2021-06-05 14:01:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:01:25,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:25,598 INFO L225 Difference]: With dead ends: 809 [2021-06-05 14:01:25,598 INFO L226 Difference]: Without dead ends: 799 [2021-06-05 14:01:25,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:01:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-05 14:01:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 666. [2021-06-05 14:01:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.948872180451128) internal successors, (1961), 665 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1961 transitions. [2021-06-05 14:01:25,605 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1961 transitions. Word has length 19 [2021-06-05 14:01:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:25,605 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1961 transitions. [2021-06-05 14:01:25,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1961 transitions. [2021-06-05 14:01:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:25,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:25,606 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:25,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:25,806 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash -697786826, now seen corresponding path program 188 times [2021-06-05 14:01:25,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:25,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406645710] [2021-06-05 14:01:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:25,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406645710] [2021-06-05 14:01:25,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406645710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891581213] [2021-06-05 14:01:25,886 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 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 14:01:25,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:25,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:25,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:26,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:26,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:26,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:26,392 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:26,393 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:26,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:26,539 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:26,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:26,540 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:26,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891581213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:26,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:26,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:26,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309176233] [2021-06-05 14:01:26,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:26,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:26,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:26,563 INFO L87 Difference]: Start difference. First operand 666 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:27,152 INFO L93 Difference]: Finished difference Result 905 states and 2517 transitions. [2021-06-05 14:01:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:01:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:27,153 INFO L225 Difference]: With dead ends: 905 [2021-06-05 14:01:27,153 INFO L226 Difference]: Without dead ends: 895 [2021-06-05 14:01:27,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:01:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-05 14:01:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 667. [2021-06-05 14:01:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.951951951951952) internal successors, (1966), 666 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1966 transitions. [2021-06-05 14:01:27,160 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1966 transitions. Word has length 19 [2021-06-05 14:01:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:27,160 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 1966 transitions. [2021-06-05 14:01:27,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1966 transitions. [2021-06-05 14:01:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:27,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:27,161 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:27,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-05 14:01:27,361 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2094507954, now seen corresponding path program 189 times [2021-06-05 14:01:27,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:27,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935460590] [2021-06-05 14:01:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:27,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935460590] [2021-06-05 14:01:27,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935460590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:27,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162184042] [2021-06-05 14:01:27,426 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 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 14:01:27,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:27,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:27,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:27,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:27,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:27,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:27,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162184042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:27,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607019190] [2021-06-05 14:01:27,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:27,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:27,788 INFO L87 Difference]: Start difference. First operand 667 states and 1966 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:28,028 INFO L93 Difference]: Finished difference Result 778 states and 2267 transitions. [2021-06-05 14:01:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:28,029 INFO L225 Difference]: With dead ends: 778 [2021-06-05 14:01:28,029 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 14:01:28,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 14:01:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 721. [2021-06-05 14:01:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.9875) internal successors, (2151), 720 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2151 transitions. [2021-06-05 14:01:28,036 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2151 transitions. Word has length 19 [2021-06-05 14:01:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:28,036 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2151 transitions. [2021-06-05 14:01:28,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2151 transitions. [2021-06-05 14:01:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:28,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:28,037 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:28,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:28,237 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1341584812, now seen corresponding path program 190 times [2021-06-05 14:01:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:28,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609120726] [2021-06-05 14:01:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:28,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609120726] [2021-06-05 14:01:28,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609120726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:28,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778783497] [2021-06-05 14:01:28,302 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 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 14:01:28,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:28,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:28,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:28,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:28,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:28,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:28,760 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:28,761 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:28,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:28,920 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:28,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:28,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:28,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778783497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:28,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:28,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:28,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989507284] [2021-06-05 14:01:28,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:28,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:28,944 INFO L87 Difference]: Start difference. First operand 721 states and 2151 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:29,649 INFO L93 Difference]: Finished difference Result 908 states and 2570 transitions. [2021-06-05 14:01:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:01:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:29,651 INFO L225 Difference]: With dead ends: 908 [2021-06-05 14:01:29,651 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 14:01:29,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:01:29,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 14:01:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 729. [2021-06-05 14:01:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.993131868131868) internal successors, (2179), 728 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2179 transitions. [2021-06-05 14:01:29,658 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2179 transitions. Word has length 19 [2021-06-05 14:01:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:29,659 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2179 transitions. [2021-06-05 14:01:29,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2179 transitions. [2021-06-05 14:01:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:29,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:29,659 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:29,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-05 14:01:29,860 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 369028496, now seen corresponding path program 191 times [2021-06-05 14:01:29,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:29,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279046189] [2021-06-05 14:01:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:29,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:29,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279046189] [2021-06-05 14:01:29,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279046189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:29,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104560877] [2021-06-05 14:01:29,936 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 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 14:01:29,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:29,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:30,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:30,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:30,416 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:30,416 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:30,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:30,583 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:30,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:30,584 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:30,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104560877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:30,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:30,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:30,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543969789] [2021-06-05 14:01:30,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:30,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:30,606 INFO L87 Difference]: Start difference. First operand 729 states and 2179 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:31,465 INFO L93 Difference]: Finished difference Result 1020 states and 2819 transitions. [2021-06-05 14:01:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:01:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:31,470 INFO L225 Difference]: With dead ends: 1020 [2021-06-05 14:01:31,470 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 14:01:31,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:01:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 14:01:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 738. [2021-06-05 14:01:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.983717774762551) internal successors, (2199), 737 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2199 transitions. [2021-06-05 14:01:31,478 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2199 transitions. Word has length 19 [2021-06-05 14:01:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:31,478 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2199 transitions. [2021-06-05 14:01:31,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2199 transitions. [2021-06-05 14:01:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:31,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:31,479 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:31,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4184 [2021-06-05 14:01:31,679 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1858433492, now seen corresponding path program 192 times [2021-06-05 14:01:31,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:31,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409916844] [2021-06-05 14:01:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:31,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409916844] [2021-06-05 14:01:31,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409916844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:31,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458306115] [2021-06-05 14:01:31,751 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 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 14:01:31,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:31,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:31,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:31,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:31,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:31,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:32,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:32,421 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:32,421 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:32,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:32,618 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:32,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:32,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:32,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458306115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:32,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:32,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:32,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824104641] [2021-06-05 14:01:32,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:32,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:32,641 INFO L87 Difference]: Start difference. First operand 738 states and 2199 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:33,161 INFO L93 Difference]: Finished difference Result 871 states and 2475 transitions. [2021-06-05 14:01:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:01:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:33,162 INFO L225 Difference]: With dead ends: 871 [2021-06-05 14:01:33,162 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 14:01:33,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:01:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 14:01:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 743. [2021-06-05 14:01:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.981132075471698) internal successors, (2212), 742 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2212 transitions. [2021-06-05 14:01:33,175 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2212 transitions. Word has length 19 [2021-06-05 14:01:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:33,175 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2212 transitions. [2021-06-05 14:01:33,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2212 transitions. [2021-06-05 14:01:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:33,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:33,176 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:33,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4294 [2021-06-05 14:01:33,376 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 785348112, now seen corresponding path program 193 times [2021-06-05 14:01:33,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:33,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549984225] [2021-06-05 14:01:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:33,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549984225] [2021-06-05 14:01:33,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549984225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214032137] [2021-06-05 14:01:33,460 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 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 14:01:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:33,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:33,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:33,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:33,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:33,918 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:33,919 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:33,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:34,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:34,441 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:34,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:34,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:34,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214032137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:34,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:34,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:34,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359238868] [2021-06-05 14:01:34,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:34,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:34,465 INFO L87 Difference]: Start difference. First operand 743 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:35,016 INFO L93 Difference]: Finished difference Result 917 states and 2588 transitions. [2021-06-05 14:01:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:01:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:35,017 INFO L225 Difference]: With dead ends: 917 [2021-06-05 14:01:35,017 INFO L226 Difference]: Without dead ends: 895 [2021-06-05 14:01:35,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:01:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-05 14:01:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 742. [2021-06-05 14:01:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-06-05 14:01:35,025 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-06-05 14:01:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:35,025 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-06-05 14:01:35,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-06-05 14:01:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:35,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:35,026 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:35,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4448,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:35,226 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1879439700, now seen corresponding path program 194 times [2021-06-05 14:01:35,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:35,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148980701] [2021-06-05 14:01:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:35,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:35,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148980701] [2021-06-05 14:01:35,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148980701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:35,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368089487] [2021-06-05 14:01:35,309 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 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 14:01:35,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:35,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:35,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:35,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:35,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:35,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:35,844 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:35,844 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:35,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:35,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:35,997 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:35,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:35,997 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:36,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368089487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:36,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:36,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:36,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500278861] [2021-06-05 14:01:36,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:36,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:36,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:36,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:36,022 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:36,530 INFO L93 Difference]: Finished difference Result 882 states and 2522 transitions. [2021-06-05 14:01:36,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:01:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:36,531 INFO L225 Difference]: With dead ends: 882 [2021-06-05 14:01:36,531 INFO L226 Difference]: Without dead ends: 872 [2021-06-05 14:01:36,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:01:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-05 14:01:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 742. [2021-06-05 14:01:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-06-05 14:01:36,539 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-06-05 14:01:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:36,539 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-06-05 14:01:36,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-06-05 14:01:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:36,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:36,544 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:36,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4610,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:36,746 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:36,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1973063432, now seen corresponding path program 195 times [2021-06-05 14:01:36,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:36,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537416108] [2021-06-05 14:01:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:36,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:36,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537416108] [2021-06-05 14:01:36,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537416108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:36,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110505237] [2021-06-05 14:01:36,827 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 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 14:01:36,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:36,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:36,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:37,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:37,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:37,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:37,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:37,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:37,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110505237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:37,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:37,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:37,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199844466] [2021-06-05 14:01:37,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:37,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:37,231 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:37,486 INFO L93 Difference]: Finished difference Result 781 states and 2273 transitions. [2021-06-05 14:01:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:01:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:37,487 INFO L225 Difference]: With dead ends: 781 [2021-06-05 14:01:37,487 INFO L226 Difference]: Without dead ends: 759 [2021-06-05 14:01:37,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:01:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-05 14:01:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 742. [2021-06-05 14:01:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.982456140350877) internal successors, (2210), 741 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2210 transitions. [2021-06-05 14:01:37,494 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2210 transitions. Word has length 19 [2021-06-05 14:01:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:37,494 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2210 transitions. [2021-06-05 14:01:37,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2210 transitions. [2021-06-05 14:01:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:37,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:37,495 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:37,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4719 [2021-06-05 14:01:37,703 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:37,704 INFO L82 PathProgramCache]: Analyzing trace with hash 343011498, now seen corresponding path program 196 times [2021-06-05 14:01:37,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:37,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101809458] [2021-06-05 14:01:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:37,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101809458] [2021-06-05 14:01:37,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101809458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624450352] [2021-06-05 14:01:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:01:37,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:37,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:37,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:38,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:38,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:38,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:38,243 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:38,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:38,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:38,426 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:38,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:38,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624450352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:38,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:38,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960536686] [2021-06-05 14:01:38,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:38,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:38,449 INFO L87 Difference]: Start difference. First operand 742 states and 2210 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:39,171 INFO L93 Difference]: Finished difference Result 986 states and 2710 transitions. [2021-06-05 14:01:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:01:39,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:39,172 INFO L225 Difference]: With dead ends: 986 [2021-06-05 14:01:39,172 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 14:01:39,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 589.9ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:01:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 14:01:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 738. [2021-06-05 14:01:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.976933514246947) internal successors, (2194), 737 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2194 transitions. [2021-06-05 14:01:39,180 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2194 transitions. Word has length 19 [2021-06-05 14:01:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:39,181 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2194 transitions. [2021-06-05 14:01:39,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2194 transitions. [2021-06-05 14:01:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:39,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:39,182 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:39,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4768,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:39,397 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -730073882, now seen corresponding path program 197 times [2021-06-05 14:01:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:39,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954541035] [2021-06-05 14:01:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:39,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:39,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954541035] [2021-06-05 14:01:39,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954541035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:39,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537496258] [2021-06-05 14:01:39,483 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 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 14:01:39,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:39,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:39,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:39,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:39,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:40,037 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:40,037 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:40,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:40,346 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:40,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:40,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:40,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537496258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:40,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:40,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:40,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728301297] [2021-06-05 14:01:40,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:40,369 INFO L87 Difference]: Start difference. First operand 738 states and 2194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:41,076 INFO L93 Difference]: Finished difference Result 978 states and 2744 transitions. [2021-06-05 14:01:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:01:41,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:41,077 INFO L225 Difference]: With dead ends: 978 [2021-06-05 14:01:41,077 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 14:01:41,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:01:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 14:01:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 716. [2021-06-05 14:01:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.9762237762237764) internal successors, (2128), 715 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2128 transitions. [2021-06-05 14:01:41,085 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2128 transitions. Word has length 19 [2021-06-05 14:01:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:41,085 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2128 transitions. [2021-06-05 14:01:41,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2128 transitions. [2021-06-05 14:01:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:41,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:41,086 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:41,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4878 [2021-06-05 14:01:41,286 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash 364017706, now seen corresponding path program 198 times [2021-06-05 14:01:41,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:41,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650032456] [2021-06-05 14:01:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:41,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:41,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650032456] [2021-06-05 14:01:41,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650032456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:41,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299253274] [2021-06-05 14:01:41,367 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 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 14:01:41,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:01:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:41,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:41,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:41,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:41,817 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:41,817 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:41,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:41,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:41,897 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:41,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:41,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:41,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299253274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:41,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:41,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:41,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706155707] [2021-06-05 14:01:41,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:41,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:41,920 INFO L87 Difference]: Start difference. First operand 716 states and 2128 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:42,386 INFO L93 Difference]: Finished difference Result 934 states and 2662 transitions. [2021-06-05 14:01:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:01:42,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:42,387 INFO L225 Difference]: With dead ends: 934 [2021-06-05 14:01:42,387 INFO L226 Difference]: Without dead ends: 924 [2021-06-05 14:01:42,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:01:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-05 14:01:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 719. [2021-06-05 14:01:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9763231197771587) internal successors, (2137), 718 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2137 transitions. [2021-06-05 14:01:42,394 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2137 transitions. Word has length 19 [2021-06-05 14:01:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:42,394 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2137 transitions. [2021-06-05 14:01:42,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2137 transitions. [2021-06-05 14:01:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:42,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:42,395 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:42,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:42,596 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1221778650, now seen corresponding path program 199 times [2021-06-05 14:01:42,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:42,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487809782] [2021-06-05 14:01:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:42,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487809782] [2021-06-05 14:01:42,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487809782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619027387] [2021-06-05 14:01:42,660 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 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 14:01:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:42,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:42,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:42,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:43,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:43,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:43,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:43,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619027387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:43,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:43,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559500486] [2021-06-05 14:01:43,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:43,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:43,022 INFO L87 Difference]: Start difference. First operand 719 states and 2137 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:43,288 INFO L93 Difference]: Finished difference Result 746 states and 2179 transitions. [2021-06-05 14:01:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:43,289 INFO L225 Difference]: With dead ends: 746 [2021-06-05 14:01:43,289 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 14:01:43,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 14:01:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 719. [2021-06-05 14:01:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9749303621169916) internal successors, (2136), 718 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2136 transitions. [2021-06-05 14:01:43,296 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2136 transitions. Word has length 19 [2021-06-05 14:01:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:43,296 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2136 transitions. [2021-06-05 14:01:43,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2136 transitions. [2021-06-05 14:01:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:43,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:43,297 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:43,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5115,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:43,497 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash -272449148, now seen corresponding path program 200 times [2021-06-05 14:01:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:43,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474985657] [2021-06-05 14:01:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:43,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474985657] [2021-06-05 14:01:43,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474985657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082105379] [2021-06-05 14:01:43,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:01:43,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:43,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:43,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:43,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:43,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:44,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:44,244 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:44,245 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:44,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:44,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:44,339 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:44,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:44,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:44,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082105379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:44,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:44,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:44,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854427163] [2021-06-05 14:01:44,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:44,363 INFO L87 Difference]: Start difference. First operand 719 states and 2136 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:45,026 INFO L93 Difference]: Finished difference Result 991 states and 2826 transitions. [2021-06-05 14:01:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:01:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:45,027 INFO L225 Difference]: With dead ends: 991 [2021-06-05 14:01:45,027 INFO L226 Difference]: Without dead ends: 981 [2021-06-05 14:01:45,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:01:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-06-05 14:01:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 730. [2021-06-05 14:01:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.9753086419753085) internal successors, (2169), 729 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2169 transitions. [2021-06-05 14:01:45,035 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2169 transitions. Word has length 19 [2021-06-05 14:01:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:45,035 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2169 transitions. [2021-06-05 14:01:45,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2169 transitions. [2021-06-05 14:01:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:45,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:45,035 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:45,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5166,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:45,236 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1324838072, now seen corresponding path program 201 times [2021-06-05 14:01:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:45,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614572230] [2021-06-05 14:01:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:45,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:45,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614572230] [2021-06-05 14:01:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614572230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:45,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561690485] [2021-06-05 14:01:45,302 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 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 14:01:45,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:45,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:45,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:45,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:45,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:45,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:45,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:45,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:45,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:45,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561690485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:45,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:45,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:45,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494094061] [2021-06-05 14:01:45,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:45,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:45,767 INFO L87 Difference]: Start difference. First operand 730 states and 2169 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:46,049 INFO L93 Difference]: Finished difference Result 865 states and 2545 transitions. [2021-06-05 14:01:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:01:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:46,050 INFO L225 Difference]: With dead ends: 865 [2021-06-05 14:01:46,050 INFO L226 Difference]: Without dead ends: 849 [2021-06-05 14:01:46,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-06-05 14:01:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 821. [2021-06-05 14:01:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.0) internal successors, (2460), 820 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2460 transitions. [2021-06-05 14:01:46,059 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2460 transitions. Word has length 19 [2021-06-05 14:01:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:46,059 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2460 transitions. [2021-06-05 14:01:46,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2460 transitions. [2021-06-05 14:01:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:46,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:46,060 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:46,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5289 [2021-06-05 14:01:46,261 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash -465963542, now seen corresponding path program 202 times [2021-06-05 14:01:46,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:46,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600903047] [2021-06-05 14:01:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:46,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600903047] [2021-06-05 14:01:46,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600903047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397054699] [2021-06-05 14:01:46,328 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 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 14:01:46,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:46,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:46,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:46,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:46,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:46,860 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:46,860 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:46,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:46,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:46,976 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:46,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:46,976 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:46,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397054699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:46,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:46,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:46,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917765408] [2021-06-05 14:01:47,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:47,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:47,000 INFO L87 Difference]: Start difference. First operand 821 states and 2460 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:47,763 INFO L93 Difference]: Finished difference Result 986 states and 2831 transitions. [2021-06-05 14:01:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:01:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:47,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:47,765 INFO L225 Difference]: With dead ends: 986 [2021-06-05 14:01:47,765 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 14:01:47,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:01:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 14:01:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 825. [2021-06-05 14:01:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.003640776699029) internal successors, (2475), 824 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2475 transitions. [2021-06-05 14:01:47,773 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2475 transitions. Word has length 19 [2021-06-05 14:01:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:47,774 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2475 transitions. [2021-06-05 14:01:47,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2475 transitions. [2021-06-05 14:01:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:47,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:47,774 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:47,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5359 [2021-06-05 14:01:47,975 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1244649766, now seen corresponding path program 203 times [2021-06-05 14:01:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:47,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28303009] [2021-06-05 14:01:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:48,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:48,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28303009] [2021-06-05 14:01:48,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28303009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:48,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929038233] [2021-06-05 14:01:48,045 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 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 14:01:48,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:48,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:48,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:48,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:48,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:48,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:48,661 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:48,662 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:48,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:48,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:48,868 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:48,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:48,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:48,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929038233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:48,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:48,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:01:48,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116037044] [2021-06-05 14:01:48,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:48,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:48,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:48,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:48,892 INFO L87 Difference]: Start difference. First operand 825 states and 2475 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:49,430 INFO L93 Difference]: Finished difference Result 1003 states and 2905 transitions. [2021-06-05 14:01:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:01:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:01:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:49,431 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 14:01:49,431 INFO L226 Difference]: Without dead ends: 993 [2021-06-05 14:01:49,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:01:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-06-05 14:01:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 875. [2021-06-05 14:01:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.011441647597254) internal successors, (2632), 874 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2632 transitions. [2021-06-05 14:01:49,440 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2632 transitions. Word has length 19 [2021-06-05 14:01:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2632 transitions. [2021-06-05 14:01:49,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:01:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2632 transitions. [2021-06-05 14:01:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:49,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:49,441 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:49,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5466,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:49,641 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1560912534, now seen corresponding path program 204 times [2021-06-05 14:01:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700436873] [2021-06-05 14:01:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:49,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:49,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700436873] [2021-06-05 14:01:49,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700436873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:49,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465114697] [2021-06-05 14:01:49,716 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 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 14:01:49,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:01:49,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:49,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:49,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:50,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:50,231 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:50,231 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:50,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:50,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:50,340 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:50,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:50,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:50,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465114697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:50,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:50,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:50,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867626029] [2021-06-05 14:01:50,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:50,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:50,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:50,365 INFO L87 Difference]: Start difference. First operand 875 states and 2632 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:51,109 INFO L93 Difference]: Finished difference Result 1134 states and 3184 transitions. [2021-06-05 14:01:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:01:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:51,111 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 14:01:51,111 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 14:01:51,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:01:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 14:01:51,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 884. [2021-06-05 14:01:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.0067950169875424) internal successors, (2655), 883 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2655 transitions. [2021-06-05 14:01:51,120 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2655 transitions. Word has length 19 [2021-06-05 14:01:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:51,120 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2655 transitions. [2021-06-05 14:01:51,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2655 transitions. [2021-06-05 14:01:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:51,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:51,121 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:51,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5579,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:51,322 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:51,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1660969382, now seen corresponding path program 205 times [2021-06-05 14:01:51,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:51,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467002780] [2021-06-05 14:01:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:51,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:51,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467002780] [2021-06-05 14:01:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467002780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782147499] [2021-06-05 14:01:51,403 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:51,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:51,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:51,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:51,870 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:51,871 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:52,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:52,086 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:52,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:52,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:52,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782147499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:52,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:52,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743547710] [2021-06-05 14:01:52,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:52,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:52,109 INFO L87 Difference]: Start difference. First operand 884 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:52,692 INFO L93 Difference]: Finished difference Result 1000 states and 2894 transitions. [2021-06-05 14:01:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:01:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:52,693 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 14:01:52,694 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 14:01:52,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:01:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 14:01:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 889. [2021-06-05 14:01:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.0033783783783785) internal successors, (2667), 888 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2667 transitions. [2021-06-05 14:01:52,702 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2667 transitions. Word has length 19 [2021-06-05 14:01:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:52,703 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2667 transitions. [2021-06-05 14:01:52,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2667 transitions. [2021-06-05 14:01:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:52,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:52,703 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:52,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5668,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:52,904 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1539906326, now seen corresponding path program 206 times [2021-06-05 14:01:52,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:52,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454572294] [2021-06-05 14:01:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:52,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:52,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454572294] [2021-06-05 14:01:52,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454572294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:52,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768836611] [2021-06-05 14:01:52,988 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 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 14:01:53,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:53,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:53,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:53,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:53,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:53,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:53,457 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:53,458 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:53,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:53,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:53,577 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:53,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:53,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:53,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768836611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:53,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:53,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:53,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046784196] [2021-06-05 14:01:53,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:53,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:53,601 INFO L87 Difference]: Start difference. First operand 889 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:54,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:54,196 INFO L93 Difference]: Finished difference Result 1045 states and 2995 transitions. [2021-06-05 14:01:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:54,196 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:54,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:54,197 INFO L225 Difference]: With dead ends: 1045 [2021-06-05 14:01:54,197 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 14:01:54,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 618.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:01:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 14:01:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 889. [2021-06-05 14:01:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-06-05 14:01:54,206 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-06-05 14:01:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:54,206 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-06-05 14:01:54,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-06-05 14:01:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:54,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:54,207 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:54,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:54,407 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1982805466, now seen corresponding path program 207 times [2021-06-05 14:01:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:54,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73120716] [2021-06-05 14:01:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:54,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:54,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73120716] [2021-06-05 14:01:54,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73120716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:54,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932884724] [2021-06-05 14:01:54,494 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 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 14:01:54,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:54,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:54,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:54,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:54,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:54,978 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:54,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:55,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:55,257 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:55,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:55,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:55,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932884724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:55,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:55,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:55,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690586597] [2021-06-05 14:01:55,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:55,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:55,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:55,281 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:55,753 INFO L93 Difference]: Finished difference Result 997 states and 2917 transitions. [2021-06-05 14:01:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:55,754 INFO L225 Difference]: With dead ends: 997 [2021-06-05 14:01:55,754 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 14:01:55,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:01:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 14:01:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 889. [2021-06-05 14:01:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-06-05 14:01:55,763 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-06-05 14:01:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:55,763 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-06-05 14:01:55,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-06-05 14:01:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:55,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:55,764 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:55,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:55,965 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2055345422, now seen corresponding path program 208 times [2021-06-05 14:01:55,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:55,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695447735] [2021-06-05 14:01:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:56,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:56,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695447735] [2021-06-05 14:01:56,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695447735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:56,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31166770] [2021-06-05 14:01:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:01:56,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:56,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:56,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:56,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:56,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:56,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:56,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:56,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:56,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:56,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31166770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:56,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:56,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037066581] [2021-06-05 14:01:56,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:56,453 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:56,824 INFO L93 Difference]: Finished difference Result 952 states and 2781 transitions. [2021-06-05 14:01:56,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:56,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:01:56,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:56,826 INFO L225 Difference]: With dead ends: 952 [2021-06-05 14:01:56,826 INFO L226 Difference]: Without dead ends: 924 [2021-06-05 14:01:56,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:01:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-05 14:01:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 889. [2021-06-05 14:01:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.001126126126126) internal successors, (2665), 888 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2665 transitions. [2021-06-05 14:01:56,835 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2665 transitions. Word has length 19 [2021-06-05 14:01:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:56,835 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2665 transitions. [2021-06-05 14:01:56,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2665 transitions. [2021-06-05 14:01:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:56,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:56,836 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:57,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5982,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:57,036 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1927527824, now seen corresponding path program 209 times [2021-06-05 14:01:57,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:57,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513855741] [2021-06-05 14:01:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:57,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:57,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513855741] [2021-06-05 14:01:57,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513855741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524778682] [2021-06-05 14:01:57,112 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 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 14:01:57,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:01:57,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:57,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:57,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:57,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:57,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:57,541 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:57,541 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:57,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:57,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:57,701 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:57,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:57,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:57,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524778682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:57,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:01:57,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165338887] [2021-06-05 14:01:57,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:01:57,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:01:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:57,725 INFO L87 Difference]: Start difference. First operand 889 states and 2665 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:01:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:58,510 INFO L93 Difference]: Finished difference Result 1134 states and 3182 transitions. [2021-06-05 14:01:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:01:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:01:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:58,512 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 14:01:58,512 INFO L226 Difference]: Without dead ends: 1107 [2021-06-05 14:01:58,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:01:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-05 14:01:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 889. [2021-06-05 14:01:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9977477477477477) internal successors, (2662), 888 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2662 transitions. [2021-06-05 14:01:58,522 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2662 transitions. Word has length 19 [2021-06-05 14:01:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:58,522 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2662 transitions. [2021-06-05 14:01:58,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:01:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2662 transitions. [2021-06-05 14:01:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:01:58,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:58,523 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:58,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6028,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:58,723 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:58,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1273347884, now seen corresponding path program 210 times [2021-06-05 14:01:58,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:58,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309617469] [2021-06-05 14:01:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:58,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:58,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309617469] [2021-06-05 14:01:58,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309617469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:58,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063774086] [2021-06-05 14:01:58,807 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 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 14:01:58,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:01:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:58,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:59,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:59,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:59,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:59,284 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:59,285 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:59,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:59,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:59,641 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:59,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:59,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:01:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:59,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063774086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:59,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:59,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:01:59,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338857831] [2021-06-05 14:01:59,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:01:59,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:59,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:01:59,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:59,664 INFO L87 Difference]: Start difference. First operand 889 states and 2662 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:00,411 INFO L93 Difference]: Finished difference Result 1135 states and 3226 transitions. [2021-06-05 14:02:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:02:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:02:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:00,412 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 14:02:00,412 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 14:02:00,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 723.7ms TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:02:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 14:02:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 867. [2021-06-05 14:02:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.9976905311778292) internal successors, (2596), 866 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2596 transitions. [2021-06-05 14:02:00,422 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2596 transitions. Word has length 19 [2021-06-05 14:02:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:00,422 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2596 transitions. [2021-06-05 14:02:00,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2596 transitions. [2021-06-05 14:02:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:00,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:00,423 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:00,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6118,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:00,623 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1716247024, now seen corresponding path program 211 times [2021-06-05 14:02:00,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:00,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077793984] [2021-06-05 14:02:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:00,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:00,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077793984] [2021-06-05 14:02:00,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077793984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:00,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054101579] [2021-06-05 14:02:00,713 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 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 14:02:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:00,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:00,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:00,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:01,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:01,259 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:01,259 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:01,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:01,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:01,414 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:01,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:01,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:01,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054101579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:01,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:01,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:01,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849912028] [2021-06-05 14:02:01,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:01,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:01,438 INFO L87 Difference]: Start difference. First operand 867 states and 2596 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:02,092 INFO L93 Difference]: Finished difference Result 1062 states and 3058 transitions. [2021-06-05 14:02:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:02:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:02,093 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 14:02:02,093 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 14:02:02,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:02:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 14:02:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 869. [2021-06-05 14:02:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9976958525345623) internal successors, (2602), 868 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2602 transitions. [2021-06-05 14:02:02,102 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2602 transitions. Word has length 19 [2021-06-05 14:02:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:02,103 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2602 transitions. [2021-06-05 14:02:02,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2602 transitions. [2021-06-05 14:02:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:02,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:02,104 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:02,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6256 [2021-06-05 14:02:02,304 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 789143798, now seen corresponding path program 212 times [2021-06-05 14:02:02,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:02,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902762992] [2021-06-05 14:02:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:02,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902762992] [2021-06-05 14:02:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902762992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:02,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632525068] [2021-06-05 14:02:02,380 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 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 14:02:02,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:02,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:02,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:02,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:02,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:02,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:02,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:02,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:02,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:02:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:02,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632525068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:02,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:02,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:02,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144873652] [2021-06-05 14:02:02,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:02,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:02,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:02,822 INFO L87 Difference]: Start difference. First operand 869 states and 2602 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:02:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:03,075 INFO L93 Difference]: Finished difference Result 915 states and 2683 transitions. [2021-06-05 14:02:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:02:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:02:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:03,076 INFO L225 Difference]: With dead ends: 915 [2021-06-05 14:02:03,076 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 14:02:03,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:02:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 14:02:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 869. [2021-06-05 14:02:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9953917050691246) internal successors, (2600), 868 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2600 transitions. [2021-06-05 14:02:03,085 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2600 transitions. Word has length 19 [2021-06-05 14:02:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:03,085 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2600 transitions. [2021-06-05 14:02:03,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:02:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2600 transitions. [2021-06-05 14:02:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:03,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:03,086 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:03,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6357,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:03,286 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 28116982, now seen corresponding path program 213 times [2021-06-05 14:02:03,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718479977] [2021-06-05 14:02:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:03,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:03,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718479977] [2021-06-05 14:02:03,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718479977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:03,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832412142] [2021-06-05 14:02:03,368 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 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 14:02:03,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:02:03,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:03,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:03,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:03,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:03,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:03,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:03,870 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:03,871 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:03,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:04,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:04,468 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:04,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:04,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:04,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832412142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:04,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:04,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292582775] [2021-06-05 14:02:04,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:04,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:04,491 INFO L87 Difference]: Start difference. First operand 869 states and 2600 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:05,309 INFO L93 Difference]: Finished difference Result 1107 states and 3182 transitions. [2021-06-05 14:02:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:02:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:02:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:05,311 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 14:02:05,311 INFO L226 Difference]: Without dead ends: 1097 [2021-06-05 14:02:05,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 756.0ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:02:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-06-05 14:02:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 896. [2021-06-05 14:02:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.9966480446927375) internal successors, (2682), 895 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2682 transitions. [2021-06-05 14:02:05,320 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2682 transitions. Word has length 19 [2021-06-05 14:02:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:05,320 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2682 transitions. [2021-06-05 14:02:05,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2682 transitions. [2021-06-05 14:02:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:05,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:05,321 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:05,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6420 [2021-06-05 14:02:05,522 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash 49617522, now seen corresponding path program 214 times [2021-06-05 14:02:05,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:05,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250081480] [2021-06-05 14:02:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:05,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:05,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250081480] [2021-06-05 14:02:05,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250081480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:05,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141990009] [2021-06-05 14:02:05,589 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 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 14:02:05,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:05,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:05,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:05,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:05,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:05,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:05,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:05,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:05,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:02:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:05,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141990009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:05,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:05,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764450338] [2021-06-05 14:02:05,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:05,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:05,935 INFO L87 Difference]: Start difference. First operand 896 states and 2682 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:06,214 INFO L93 Difference]: Finished difference Result 1009 states and 2994 transitions. [2021-06-05 14:02:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:02:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:06,216 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 14:02:06,216 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 14:02:06,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:02:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 14:02:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 972. [2021-06-05 14:02:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.015447991761071) internal successors, (2928), 971 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 2928 transitions. [2021-06-05 14:02:06,226 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 2928 transitions. Word has length 19 [2021-06-05 14:02:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:06,226 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 2928 transitions. [2021-06-05 14:02:06,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 2928 transitions. [2021-06-05 14:02:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:06,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:06,227 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:06,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6583 [2021-06-05 14:02:06,427 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash 908492052, now seen corresponding path program 215 times [2021-06-05 14:02:06,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:06,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280303241] [2021-06-05 14:02:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:06,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:06,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280303241] [2021-06-05 14:02:06,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280303241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:06,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180716937] [2021-06-05 14:02:06,494 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 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 14:02:06,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:02:06,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:06,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:06,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:06,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:06,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:06,977 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:06,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:07,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:07,181 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:07,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:07,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:07,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180716937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:07,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:07,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:07,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575389436] [2021-06-05 14:02:07,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:07,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:07,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:07,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:07,205 INFO L87 Difference]: Start difference. First operand 972 states and 2928 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:07,962 INFO L93 Difference]: Finished difference Result 1109 states and 3246 transitions. [2021-06-05 14:02:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:02:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:02:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:07,964 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 14:02:07,964 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:02:07,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:02:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:02:07,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 976. [2021-06-05 14:02:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.0194871794871796) internal successors, (2944), 975 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2944 transitions. [2021-06-05 14:02:07,974 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2944 transitions. Word has length 19 [2021-06-05 14:02:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:07,974 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 2944 transitions. [2021-06-05 14:02:07,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2944 transitions. [2021-06-05 14:02:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:07,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:07,975 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:08,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6632,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:08,176 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1675861936, now seen corresponding path program 216 times [2021-06-05 14:02:08,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:08,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956353817] [2021-06-05 14:02:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:08,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:08,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956353817] [2021-06-05 14:02:08,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956353817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:08,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689275170] [2021-06-05 14:02:08,244 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 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 14:02:08,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:02:08,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:08,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:08,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:08,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:08,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:08,682 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:08,683 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:08,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:08,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:08,818 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:08,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:08,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689275170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:08,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:08,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730149083] [2021-06-05 14:02:08,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:08,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:08,842 INFO L87 Difference]: Start difference. First operand 976 states and 2944 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:09,520 INFO L93 Difference]: Finished difference Result 1144 states and 3334 transitions. [2021-06-05 14:02:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:02:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:02:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:09,522 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 14:02:09,522 INFO L226 Difference]: Without dead ends: 1134 [2021-06-05 14:02:09,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:02:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-06-05 14:02:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1010. [2021-06-05 14:02:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.0297324083250743) internal successors, (3057), 1009 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3057 transitions. [2021-06-05 14:02:09,532 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3057 transitions. Word has length 19 [2021-06-05 14:02:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:09,532 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 3057 transitions. [2021-06-05 14:02:09,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3057 transitions. [2021-06-05 14:02:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:09,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:09,533 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:09,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6761,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:09,734 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:09,734 INFO L82 PathProgramCache]: Analyzing trace with hash -186456940, now seen corresponding path program 217 times [2021-06-05 14:02:09,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:09,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411998860] [2021-06-05 14:02:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:09,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:09,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411998860] [2021-06-05 14:02:09,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411998860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:09,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775724810] [2021-06-05 14:02:09,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:02:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:09,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:10,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:10,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:10,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:10,378 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:10,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:10,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:10,532 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:10,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:10,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:10,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775724810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:10,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:10,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:10,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670639626] [2021-06-05 14:02:10,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:10,555 INFO L87 Difference]: Start difference. First operand 1010 states and 3057 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:11,272 INFO L93 Difference]: Finished difference Result 1206 states and 3490 transitions. [2021-06-05 14:02:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:02:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 19 [2021-06-05 14:02:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:11,274 INFO L225 Difference]: With dead ends: 1206 [2021-06-05 14:02:11,274 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 14:02:11,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:02:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 14:02:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1047. [2021-06-05 14:02:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.0315487571701722) internal successors, (3171), 1046 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3171 transitions. [2021-06-05 14:02:11,284 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3171 transitions. Word has length 19 [2021-06-05 14:02:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:11,285 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3171 transitions. [2021-06-05 14:02:11,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) 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 14:02:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3171 transitions. [2021-06-05 14:02:11,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:11,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:11,286 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:11,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6856 [2021-06-05 14:02:11,486 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1259542320, now seen corresponding path program 218 times [2021-06-05 14:02:11,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:11,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65552807] [2021-06-05 14:02:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:11,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:11,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65552807] [2021-06-05 14:02:11,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65552807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:11,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221960144] [2021-06-05 14:02:11,561 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 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 14:02:11,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:11,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:11,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:11,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:11,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:11,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:12,032 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:12,032 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:12,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:12,189 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:12,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:12,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:12,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221960144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:12,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:12,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:12,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273677175] [2021-06-05 14:02:12,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:12,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:12,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:12,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:12,220 INFO L87 Difference]: Start difference. First operand 1047 states and 3171 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:02:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:13,111 INFO L93 Difference]: Finished difference Result 1314 states and 3702 transitions. [2021-06-05 14:02:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:02:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:02:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:13,112 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 14:02:13,112 INFO L226 Difference]: Without dead ends: 1289 [2021-06-05 14:02:13,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:02:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-06-05 14:02:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1050. [2021-06-05 14:02:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.0276453765490943) internal successors, (3176), 1049 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3176 transitions. [2021-06-05 14:02:13,124 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3176 transitions. Word has length 19 [2021-06-05 14:02:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:13,124 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3176 transitions. [2021-06-05 14:02:13,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:02:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3176 transitions. [2021-06-05 14:02:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:13,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:13,125 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:13,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6976,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:13,325 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:13,325 INFO L82 PathProgramCache]: Analyzing trace with hash -165450732, now seen corresponding path program 219 times [2021-06-05 14:02:13,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:13,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630466066] [2021-06-05 14:02:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:13,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630466066] [2021-06-05 14:02:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630466066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317937243] [2021-06-05 14:02:13,401 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 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 14:02:13,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:02:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:13,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:13,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:13,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:13,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:13,847 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:13,847 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:13,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:14,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:14,215 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:14,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:14,216 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:14,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317937243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:14,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:14,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:14,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125367001] [2021-06-05 14:02:14,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:14,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:14,239 INFO L87 Difference]: Start difference. First operand 1050 states and 3176 transitions. Second operand has 24 states, 24 states have (on average 1.375) 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 14:02:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:14,886 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2021-06-05 14:02:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:02:14,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) 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 19 [2021-06-05 14:02:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:14,887 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 14:02:14,887 INFO L226 Difference]: Without dead ends: 1193 [2021-06-05 14:02:14,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:02:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-05 14:02:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1057. [2021-06-05 14:02:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.024621212121212) internal successors, (3194), 1056 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3194 transitions. [2021-06-05 14:02:14,898 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3194 transitions. Word has length 19 [2021-06-05 14:02:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:14,898 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 3194 transitions. [2021-06-05 14:02:14,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) 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 14:02:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3194 transitions. [2021-06-05 14:02:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:14,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:14,899 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:15,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7085 [2021-06-05 14:02:15,099 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash -608349872, now seen corresponding path program 220 times [2021-06-05 14:02:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:15,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135675754] [2021-06-05 14:02:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:15,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135675754] [2021-06-05 14:02:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135675754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011116263] [2021-06-05 14:02:15,182 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 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 14:02:15,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:15,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:15,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:15,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:15,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:15,888 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:15,889 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:15,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:16,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:16,303 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:16,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:16,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:16,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011116263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:16,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:16,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:16,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363356365] [2021-06-05 14:02:16,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:16,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:16,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:16,328 INFO L87 Difference]: Start difference. First operand 1057 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:17,026 INFO L93 Difference]: Finished difference Result 1268 states and 3657 transitions. [2021-06-05 14:02:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:02:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:17,027 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 14:02:17,027 INFO L226 Difference]: Without dead ends: 1253 [2021-06-05 14:02:17,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:02:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-06-05 14:02:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1056. [2021-06-05 14:02:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.0274881516587677) internal successors, (3194), 1055 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3194 transitions. [2021-06-05 14:02:17,038 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3194 transitions. Word has length 19 [2021-06-05 14:02:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:17,038 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 3194 transitions. [2021-06-05 14:02:17,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3194 transitions. [2021-06-05 14:02:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:17,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:17,039 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:17,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7205,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:17,240 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1453321324, now seen corresponding path program 221 times [2021-06-05 14:02:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:17,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497059668] [2021-06-05 14:02:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:17,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:17,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497059668] [2021-06-05 14:02:17,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497059668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:17,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065773111] [2021-06-05 14:02:17,328 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 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 14:02:17,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:02:17,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:17,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:02:17,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:17,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:17,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:17,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:17,800 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:17,800 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:17,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:17,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:17,981 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:17,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:17,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-06-05 14:02:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:18,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065773111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:18,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:18,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527539370] [2021-06-05 14:02:18,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:18,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:18,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:18,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:18,005 INFO L87 Difference]: Start difference. First operand 1056 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:18,594 INFO L93 Difference]: Finished difference Result 1209 states and 3557 transitions. [2021-06-05 14:02:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:02:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:02:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:18,595 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 14:02:18,595 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 14:02:18,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:02:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 14:02:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1058. [2021-06-05 14:02:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.024597918637654) internal successors, (3197), 1057 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3197 transitions. [2021-06-05 14:02:18,606 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3197 transitions. Word has length 19 [2021-06-05 14:02:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:18,606 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 3197 transitions. [2021-06-05 14:02:18,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3197 transitions. [2021-06-05 14:02:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:18,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:18,607 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:18,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7448,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:18,807 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2016450674, now seen corresponding path program 222 times [2021-06-05 14:02:18,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:18,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524276727] [2021-06-05 14:02:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:18,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:18,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524276727] [2021-06-05 14:02:18,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524276727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32984266] [2021-06-05 14:02:18,898 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 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 14:02:18,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:02:18,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:18,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:19,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:19,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:19,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:19,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:19,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:19,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32984266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:19,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:19,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:19,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320622514] [2021-06-05 14:02:19,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:19,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:19,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:19,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:19,785 INFO L87 Difference]: Start difference. First operand 1058 states and 3197 transitions. Second operand has 25 states, 25 states have (on average 1.4) 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 14:02:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:20,163 INFO L93 Difference]: Finished difference Result 1126 states and 3328 transitions. [2021-06-05 14:02:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) 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 20 [2021-06-05 14:02:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:20,165 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 14:02:20,165 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 14:02:20,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:02:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 14:02:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1063. [2021-06-05 14:02:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.019774011299435) internal successors, (3207), 1062 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3207 transitions. [2021-06-05 14:02:20,175 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3207 transitions. Word has length 20 [2021-06-05 14:02:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:20,175 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3207 transitions. [2021-06-05 14:02:20,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) 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 14:02:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3207 transitions. [2021-06-05 14:02:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:20,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:20,176 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:20,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7560 [2021-06-05 14:02:20,377 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2008627890, now seen corresponding path program 223 times [2021-06-05 14:02:20,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:20,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937580674] [2021-06-05 14:02:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:20,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:20,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937580674] [2021-06-05 14:02:20,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937580674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:20,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445178437] [2021-06-05 14:02:20,450 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 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 14:02:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:20,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:20,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:21,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:21,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:21,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:21,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445178437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:21,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963719174] [2021-06-05 14:02:21,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:21,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:21,032 INFO L87 Difference]: Start difference. First operand 1063 states and 3207 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 14:02:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:21,428 INFO L93 Difference]: Finished difference Result 1193 states and 3423 transitions. [2021-06-05 14:02:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:21,429 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 20 [2021-06-05 14:02:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:21,430 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 14:02:21,430 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 14:02:21,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 14:02:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1065. [2021-06-05 14:02:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-06-05 14:02:21,440 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-06-05 14:02:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:21,441 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-06-05 14:02:21,441 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 14:02:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-06-05 14:02:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:21,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:21,442 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:21,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7663 [2021-06-05 14:02:21,642 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash 560859948, now seen corresponding path program 224 times [2021-06-05 14:02:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973787228] [2021-06-05 14:02:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:21,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973787228] [2021-06-05 14:02:21,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973787228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156129912] [2021-06-05 14:02:21,711 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 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 14:02:21,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:21,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:21,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:23,100 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 239 [2021-06-05 14:02:23,214 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 243 [2021-06-05 14:02:23,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:23,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156129912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:23,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:23,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:23,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123309070] [2021-06-05 14:02:23,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:23,494 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:23,866 INFO L93 Difference]: Finished difference Result 1199 states and 3459 transitions. [2021-06-05 14:02:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:02:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:23,868 INFO L225 Difference]: With dead ends: 1199 [2021-06-05 14:02:23,868 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 14:02:23,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 14:02:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1065. [2021-06-05 14:02:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-06-05 14:02:23,879 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-06-05 14:02:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:23,879 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-06-05 14:02:23,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-06-05 14:02:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:23,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:23,880 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:24,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7760 [2021-06-05 14:02:24,081 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1075164181, now seen corresponding path program 225 times [2021-06-05 14:02:24,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:24,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534501525] [2021-06-05 14:02:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:24,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534501525] [2021-06-05 14:02:24,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534501525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794349869] [2021-06-05 14:02:24,116 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 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 14:02:24,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:02:24,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:02:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794349869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:24,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:02:24,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667968802] [2021-06-05 14:02:24,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:02:24,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:02:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:02:24,168 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 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 14:02:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:24,212 INFO L93 Difference]: Finished difference Result 1365 states and 3760 transitions. [2021-06-05 14:02:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:02:24,212 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 20 [2021-06-05 14:02:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:24,213 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 14:02:24,213 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 14:02:24,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 14:02:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1073. [2021-06-05 14:02:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0261194029850746) internal successors, (3244), 1072 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3244 transitions. [2021-06-05 14:02:24,224 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3244 transitions. Word has length 20 [2021-06-05 14:02:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:24,225 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3244 transitions. [2021-06-05 14:02:24,225 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 14:02:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3244 transitions. [2021-06-05 14:02:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:24,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:24,226 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:24,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8018,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:24,426 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash 421097848, now seen corresponding path program 226 times [2021-06-05 14:02:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:24,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519311649] [2021-06-05 14:02:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:24,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519311649] [2021-06-05 14:02:24,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519311649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538986955] [2021-06-05 14:02:24,493 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 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 14:02:24,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:24,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:24,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:24,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:24,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:25,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:25,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:25,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:25,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538986955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:25,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130106427] [2021-06-05 14:02:25,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:25,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:25,186 INFO L87 Difference]: Start difference. First operand 1073 states and 3244 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 14:02:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:25,478 INFO L93 Difference]: Finished difference Result 1199 states and 3479 transitions. [2021-06-05 14:02:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:25,479 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 20 [2021-06-05 14:02:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:25,480 INFO L225 Difference]: With dead ends: 1199 [2021-06-05 14:02:25,480 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 14:02:25,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 14:02:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1079. [2021-06-05 14:02:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.031539888682746) internal successors, (3268), 1078 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3268 transitions. [2021-06-05 14:02:25,491 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3268 transitions. Word has length 20 [2021-06-05 14:02:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:25,491 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3268 transitions. [2021-06-05 14:02:25,491 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 14:02:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3268 transitions. [2021-06-05 14:02:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:25,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:25,492 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:25,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8019 [2021-06-05 14:02:25,692 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1304381610, now seen corresponding path program 227 times [2021-06-05 14:02:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802748801] [2021-06-05 14:02:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802748801] [2021-06-05 14:02:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802748801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729406710] [2021-06-05 14:02:25,761 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 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 14:02:25,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:02:25,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:26,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:26,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:26,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:26,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:26,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:26,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729406710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:26,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986091019] [2021-06-05 14:02:26,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:26,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:26,550 INFO L87 Difference]: Start difference. First operand 1079 states and 3268 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:26,889 INFO L93 Difference]: Finished difference Result 1210 states and 3510 transitions. [2021-06-05 14:02:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:26,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:26,891 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:02:26,891 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 14:02:26,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:02:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 14:02:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1081. [2021-06-05 14:02:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.0296296296296297) internal successors, (3272), 1080 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3272 transitions. [2021-06-05 14:02:26,902 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3272 transitions. Word has length 20 [2021-06-05 14:02:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:26,902 INFO L482 AbstractCegarLoop]: Abstraction has 1081 states and 3272 transitions. [2021-06-05 14:02:26,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3272 transitions. [2021-06-05 14:02:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:26,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:26,903 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:27,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8107,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:27,104 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 185023386, now seen corresponding path program 228 times [2021-06-05 14:02:27,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:27,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639270499] [2021-06-05 14:02:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639270499] [2021-06-05 14:02:27,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639270499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529159479] [2021-06-05 14:02:27,170 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 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 14:02:27,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:02:27,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:27,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:27,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:27,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:27,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:27,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:27,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529159479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:27,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:27,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730460629] [2021-06-05 14:02:27,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:27,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:27,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:27,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:27,916 INFO L87 Difference]: Start difference. First operand 1081 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,146 INFO L93 Difference]: Finished difference Result 1169 states and 3442 transitions. [2021-06-05 14:02:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:02:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,148 INFO L225 Difference]: With dead ends: 1169 [2021-06-05 14:02:28,148 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 14:02:28,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:02:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 14:02:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1082. [2021-06-05 14:02:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 3.0296022201665127) internal successors, (3275), 1081 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3275 transitions. [2021-06-05 14:02:28,158 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3275 transitions. Word has length 20 [2021-06-05 14:02:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,158 INFO L482 AbstractCegarLoop]: Abstraction has 1082 states and 3275 transitions. [2021-06-05 14:02:28,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3275 transitions. [2021-06-05 14:02:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:28,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,159 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:28,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8219,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:28,360 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash -706298245, now seen corresponding path program 229 times [2021-06-05 14:02:28,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:28,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449228170] [2021-06-05 14:02:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449228170] [2021-06-05 14:02:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449228170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824650335] [2021-06-05 14:02:28,394 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 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 14:02:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:02:28,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824650335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:28,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:02:28,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930200305] [2021-06-05 14:02:28,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:02:28,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:02:28,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:28,449 INFO L87 Difference]: Start difference. First operand 1082 states and 3275 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:02:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,520 INFO L93 Difference]: Finished difference Result 1465 states and 4016 transitions. [2021-06-05 14:02:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:02:28,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-06-05 14:02:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,522 INFO L225 Difference]: With dead ends: 1465 [2021-06-05 14:02:28,522 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 14:02:28,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:02:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 14:02:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1072. [2021-06-05 14:02:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.022408963585434) internal successors, (3237), 1071 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3237 transitions. [2021-06-05 14:02:28,534 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3237 transitions. Word has length 20 [2021-06-05 14:02:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,534 INFO L482 AbstractCegarLoop]: Abstraction has 1072 states and 3237 transitions. [2021-06-05 14:02:28,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:02:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3237 transitions. [2021-06-05 14:02:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:28,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,535 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:28,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8341,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:28,737 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1248078420, now seen corresponding path program 230 times [2021-06-05 14:02:28,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:28,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625669424] [2021-06-05 14:02:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:02:28,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625669424] [2021-06-05 14:02:28,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625669424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093064533] [2021-06-05 14:02:28,794 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 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 14:02:28,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:28,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:29,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:29,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:29,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:29,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:29,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:29,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:29,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093064533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:29,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:29,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:02:29,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832229618] [2021-06-05 14:02:29,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:29,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:29,279 INFO L87 Difference]: Start difference. First operand 1072 states and 3237 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) 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 14:02:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:29,507 INFO L93 Difference]: Finished difference Result 1095 states and 3276 transitions. [2021-06-05 14:02:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) 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 20 [2021-06-05 14:02:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:29,509 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 14:02:29,509 INFO L226 Difference]: Without dead ends: 1080 [2021-06-05 14:02:29,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:02:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-06-05 14:02:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1069. [2021-06-05 14:02:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.019662921348315) internal successors, (3225), 1068 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3225 transitions. [2021-06-05 14:02:29,519 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3225 transitions. Word has length 20 [2021-06-05 14:02:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:29,519 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3225 transitions. [2021-06-05 14:02:29,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) 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 14:02:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3225 transitions. [2021-06-05 14:02:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:29,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:29,520 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:29,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-06-05 14:02:29,721 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1296543798, now seen corresponding path program 231 times [2021-06-05 14:02:29,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:29,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730367793] [2021-06-05 14:02:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:29,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:29,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730367793] [2021-06-05 14:02:29,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730367793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:29,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750349220] [2021-06-05 14:02:29,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:02:29,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:02:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:29,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:30,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:31,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:31,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:31,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:31,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:31,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750349220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:31,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:31,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:31,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134573843] [2021-06-05 14:02:31,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:31,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:31,440 INFO L87 Difference]: Start difference. First operand 1069 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:31,776 INFO L93 Difference]: Finished difference Result 1190 states and 3432 transitions. [2021-06-05 14:02:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:02:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:31,778 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 14:02:31,778 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 14:02:31,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:02:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 14:02:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1068. [2021-06-05 14:02:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.0159325210871604) internal successors, (3218), 1067 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3218 transitions. [2021-06-05 14:02:31,788 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3218 transitions. Word has length 20 [2021-06-05 14:02:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:31,788 INFO L482 AbstractCegarLoop]: Abstraction has 1068 states and 3218 transitions. [2021-06-05 14:02:31,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3218 transitions. [2021-06-05 14:02:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:31,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:31,789 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:31,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8416,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:31,990 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1566815602, now seen corresponding path program 232 times [2021-06-05 14:02:31,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:31,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317962230] [2021-06-05 14:02:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:32,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317962230] [2021-06-05 14:02:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317962230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215751997] [2021-06-05 14:02:32,061 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 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 14:02:32,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:32,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:32,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:32,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:32,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:32,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215751997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:32,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:32,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:32,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940271304] [2021-06-05 14:02:32,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:32,739 INFO L87 Difference]: Start difference. First operand 1068 states and 3218 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 14:02:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:33,034 INFO L93 Difference]: Finished difference Result 1170 states and 3412 transitions. [2021-06-05 14:02:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:33,034 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 20 [2021-06-05 14:02:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:33,036 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 14:02:33,036 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 14:02:33,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 14:02:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1073. [2021-06-05 14:02:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-06-05 14:02:33,046 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-06-05 14:02:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:33,046 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-06-05 14:02:33,047 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 14:02:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-06-05 14:02:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:33,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:33,048 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8711,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:33,248 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1002672236, now seen corresponding path program 233 times [2021-06-05 14:02:33,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:33,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671406032] [2021-06-05 14:02:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:33,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:33,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671406032] [2021-06-05 14:02:33,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671406032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:33,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111358292] [2021-06-05 14:02:33,312 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 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 14:02:33,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:02:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:33,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:33,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:34,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:34,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:34,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:34,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:34,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111358292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:34,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:34,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745644834] [2021-06-05 14:02:34,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:34,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:34,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:34,143 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:34,492 INFO L93 Difference]: Finished difference Result 1158 states and 3390 transitions. [2021-06-05 14:02:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:34,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:34,493 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 14:02:34,493 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 14:02:34,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:02:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 14:02:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1073. [2021-06-05 14:02:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-06-05 14:02:34,504 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-06-05 14:02:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:34,504 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-06-05 14:02:34,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-06-05 14:02:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:34,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:34,505 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:34,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8801,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:34,706 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1802890064, now seen corresponding path program 234 times [2021-06-05 14:02:34,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:34,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672675354] [2021-06-05 14:02:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:34,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672675354] [2021-06-05 14:02:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672675354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372530287] [2021-06-05 14:02:34,779 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 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 14:02:34,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:02:34,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:34,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:34,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:35,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:35,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:35,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:35,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:35,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:35,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372530287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:35,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:35,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:35,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069883294] [2021-06-05 14:02:35,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:35,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:35,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:35,833 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:36,343 INFO L93 Difference]: Finished difference Result 1194 states and 3443 transitions. [2021-06-05 14:02:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:02:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:36,345 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 14:02:36,345 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 14:02:36,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:02:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 14:02:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1073. [2021-06-05 14:02:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0065298507462686) internal successors, (3223), 1072 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3223 transitions. [2021-06-05 14:02:36,356 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3223 transitions. Word has length 20 [2021-06-05 14:02:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:36,356 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3223 transitions. [2021-06-05 14:02:36,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3223 transitions. [2021-06-05 14:02:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:36,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:36,357 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:36,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8896 [2021-06-05 14:02:36,558 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1600755601, now seen corresponding path program 235 times [2021-06-05 14:02:36,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:36,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872354784] [2021-06-05 14:02:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:36,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872354784] [2021-06-05 14:02:36,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872354784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686535383] [2021-06-05 14:02:36,594 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 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 14:02:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:02:36,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:36,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686535383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:36,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:02:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553544748] [2021-06-05 14:02:36,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:02:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:02:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:36,646 INFO L87 Difference]: Start difference. First operand 1073 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:02:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:36,726 INFO L93 Difference]: Finished difference Result 1408 states and 3883 transitions. [2021-06-05 14:02:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:02:36,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-06-05 14:02:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:36,728 INFO L225 Difference]: With dead ends: 1408 [2021-06-05 14:02:36,728 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 14:02:36,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:02:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 14:02:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1089. [2021-06-05 14:02:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 3.011029411764706) internal successors, (3276), 1088 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3276 transitions. [2021-06-05 14:02:36,739 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3276 transitions. Word has length 20 [2021-06-05 14:02:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:36,739 INFO L482 AbstractCegarLoop]: Abstraction has 1089 states and 3276 transitions. [2021-06-05 14:02:36,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:02:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3276 transitions. [2021-06-05 14:02:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:36,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:36,741 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:36,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9060,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:36,941 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1418991852, now seen corresponding path program 236 times [2021-06-05 14:02:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700146366] [2021-06-05 14:02:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:37,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:37,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700146366] [2021-06-05 14:02:37,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700146366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:37,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340615377] [2021-06-05 14:02:37,022 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 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 14:02:37,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:37,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:37,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:37,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:37,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:37,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:37,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:37,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:37,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340615377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:37,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:37,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:37,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087928017] [2021-06-05 14:02:37,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:37,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:37,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:37,829 INFO L87 Difference]: Start difference. First operand 1089 states and 3276 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:38,165 INFO L93 Difference]: Finished difference Result 1220 states and 3550 transitions. [2021-06-05 14:02:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:02:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:38,167 INFO L225 Difference]: With dead ends: 1220 [2021-06-05 14:02:38,167 INFO L226 Difference]: Without dead ends: 1215 [2021-06-05 14:02:38,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-06-05 14:02:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1090. [2021-06-05 14:02:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.0110192837465566) internal successors, (3279), 1089 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3279 transitions. [2021-06-05 14:02:38,177 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3279 transitions. Word has length 20 [2021-06-05 14:02:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:38,177 INFO L482 AbstractCegarLoop]: Abstraction has 1090 states and 3279 transitions. [2021-06-05 14:02:38,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3279 transitions. [2021-06-05 14:02:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:38,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:38,178 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:38,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9061,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:38,379 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:38,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2138611179, now seen corresponding path program 237 times [2021-06-05 14:02:38,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:38,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747991376] [2021-06-05 14:02:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:38,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:38,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747991376] [2021-06-05 14:02:38,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747991376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:38,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696373839] [2021-06-05 14:02:38,415 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 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 14:02:38,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:02:38,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:38,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:02:38,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:38,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696373839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:38,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:38,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:02:38,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278526693] [2021-06-05 14:02:38,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:02:38,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:38,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:02:38,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:02:38,467 INFO L87 Difference]: Start difference. First operand 1090 states and 3279 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:02:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:38,550 INFO L93 Difference]: Finished difference Result 1834 states and 5241 transitions. [2021-06-05 14:02:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:02:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-06-05 14:02:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:38,552 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 14:02:38,552 INFO L226 Difference]: Without dead ends: 1834 [2021-06-05 14:02:38,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-06-05 14:02:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1516. [2021-06-05 14:02:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.0613861386138614) internal successors, (4638), 1515 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4638 transitions. [2021-06-05 14:02:38,568 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4638 transitions. Word has length 20 [2021-06-05 14:02:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:38,568 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 4638 transitions. [2021-06-05 14:02:38,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:02:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4638 transitions. [2021-06-05 14:02:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:38,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:38,570 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:38,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9186,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:38,770 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash 67979132, now seen corresponding path program 238 times [2021-06-05 14:02:38,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:38,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932558114] [2021-06-05 14:02:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:02:38,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932558114] [2021-06-05 14:02:38,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932558114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976425697] [2021-06-05 14:02:38,827 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 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 14:02:38,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:38,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:38,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:38,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:39,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:40,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:40,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:40,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:40,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:40,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976425697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:40,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:40,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:02:40,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734669000] [2021-06-05 14:02:40,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:40,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:40,421 INFO L87 Difference]: Start difference. First operand 1516 states and 4638 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) 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 14:02:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:40,672 INFO L93 Difference]: Finished difference Result 1539 states and 4677 transitions. [2021-06-05 14:02:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) 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 20 [2021-06-05 14:02:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:40,674 INFO L225 Difference]: With dead ends: 1539 [2021-06-05 14:02:40,674 INFO L226 Difference]: Without dead ends: 1524 [2021-06-05 14:02:40,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-06-05 14:02:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1514. [2021-06-05 14:02:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.060806345009914) internal successors, (4631), 1513 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4631 transitions. [2021-06-05 14:02:40,689 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4631 transitions. Word has length 20 [2021-06-05 14:02:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:40,689 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4631 transitions. [2021-06-05 14:02:40,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) 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 14:02:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4631 transitions. [2021-06-05 14:02:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:40,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:40,691 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:40,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9187 [2021-06-05 14:02:40,891 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1559917892, now seen corresponding path program 239 times [2021-06-05 14:02:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:40,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218354020] [2021-06-05 14:02:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:40,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:40,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218354020] [2021-06-05 14:02:40,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218354020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:40,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563352135] [2021-06-05 14:02:40,967 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 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 14:02:40,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:02:40,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:40,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:41,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:41,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:42,470 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 235 [2021-06-05 14:02:42,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:42,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563352135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:42,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:42,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:42,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928132356] [2021-06-05 14:02:42,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:42,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:42,805 INFO L87 Difference]: Start difference. First operand 1514 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:43,147 INFO L93 Difference]: Finished difference Result 1653 states and 4904 transitions. [2021-06-05 14:02:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:02:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:43,149 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 14:02:43,149 INFO L226 Difference]: Without dead ends: 1640 [2021-06-05 14:02:43,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-06-05 14:02:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1514. [2021-06-05 14:02:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.056179775280899) internal successors, (4624), 1513 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4624 transitions. [2021-06-05 14:02:43,164 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4624 transitions. Word has length 20 [2021-06-05 14:02:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:43,164 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4624 transitions. [2021-06-05 14:02:43,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4624 transitions. [2021-06-05 14:02:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:43,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:43,166 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:43,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9390,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:43,366 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1232376888, now seen corresponding path program 240 times [2021-06-05 14:02:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:43,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348822647] [2021-06-05 14:02:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:43,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:43,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348822647] [2021-06-05 14:02:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348822647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:43,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296582524] [2021-06-05 14:02:43,434 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 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 14:02:43,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:02:43,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:43,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:43,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:43,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:43,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:43,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:43,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:43,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296582524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:43,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:43,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514325730] [2021-06-05 14:02:43,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:43,984 INFO L87 Difference]: Start difference. First operand 1514 states and 4624 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 14:02:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:44,261 INFO L93 Difference]: Finished difference Result 1609 states and 4809 transitions. [2021-06-05 14:02:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:44,262 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 20 [2021-06-05 14:02:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:44,263 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 14:02:44,263 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 14:02:44,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 14:02:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1517. [2021-06-05 14:02:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.058047493403694) internal successors, (4636), 1516 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4636 transitions. [2021-06-05 14:02:44,279 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4636 transitions. Word has length 20 [2021-06-05 14:02:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:44,279 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 4636 transitions. [2021-06-05 14:02:44,279 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 14:02:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4636 transitions. [2021-06-05 14:02:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:44,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:44,281 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:44,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9645 [2021-06-05 14:02:44,481 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash -493102570, now seen corresponding path program 241 times [2021-06-05 14:02:44,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:44,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35370040] [2021-06-05 14:02:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:44,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35370040] [2021-06-05 14:02:44,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35370040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788905665] [2021-06-05 14:02:44,560 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 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 14:02:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:44,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:44,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:45,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:45,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:45,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:45,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:45,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788905665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:45,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:45,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:45,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241485810] [2021-06-05 14:02:45,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:45,664 INFO L87 Difference]: Start difference. First operand 1517 states and 4636 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:45,948 INFO L93 Difference]: Finished difference Result 1614 states and 4819 transitions. [2021-06-05 14:02:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:45,950 INFO L225 Difference]: With dead ends: 1614 [2021-06-05 14:02:45,950 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 14:02:45,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:02:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 14:02:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1515. [2021-06-05 14:02:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-06-05 14:02:45,967 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-06-05 14:02:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:45,967 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-06-05 14:02:45,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-06-05 14:02:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:45,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:45,968 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:46,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9740,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:46,168 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 996302426, now seen corresponding path program 242 times [2021-06-05 14:02:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:46,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191559961] [2021-06-05 14:02:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:46,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:46,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191559961] [2021-06-05 14:02:46,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191559961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:46,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794123968] [2021-06-05 14:02:46,236 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 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 14:02:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:46,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:46,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:47,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:47,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:47,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:47,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794123968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:47,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:47,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255757260] [2021-06-05 14:02:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:47,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:47,725 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:47,936 INFO L93 Difference]: Finished difference Result 1606 states and 4806 transitions. [2021-06-05 14:02:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:02:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:47,938 INFO L225 Difference]: With dead ends: 1606 [2021-06-05 14:02:47,938 INFO L226 Difference]: Without dead ends: 1601 [2021-06-05 14:02:47,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:02:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-06-05 14:02:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1515. [2021-06-05 14:02:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-06-05 14:02:47,953 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-06-05 14:02:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:47,953 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-06-05 14:02:47,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-06-05 14:02:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:47,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:47,955 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:48,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-06-05 14:02:48,161 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash -76782954, now seen corresponding path program 243 times [2021-06-05 14:02:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:48,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894063799] [2021-06-05 14:02:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:48,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:48,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894063799] [2021-06-05 14:02:48,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894063799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723297326] [2021-06-05 14:02:48,237 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 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 14:02:48,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:02:48,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:48,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:48,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:48,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:48,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723297326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:48,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:48,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609647449] [2021-06-05 14:02:48,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:48,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:48,722 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:49,070 INFO L93 Difference]: Finished difference Result 1644 states and 4888 transitions. [2021-06-05 14:02:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:02:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:49,072 INFO L225 Difference]: With dead ends: 1644 [2021-06-05 14:02:49,072 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 14:02:49,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 14:02:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1515. [2021-06-05 14:02:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0574636723910174) internal successors, (4629), 1514 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4629 transitions. [2021-06-05 14:02:49,087 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4629 transitions. Word has length 20 [2021-06-05 14:02:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:49,087 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 4629 transitions. [2021-06-05 14:02:49,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4629 transitions. [2021-06-05 14:02:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:49,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:49,089 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:49,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10169,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:49,289 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash 642836373, now seen corresponding path program 244 times [2021-06-05 14:02:49,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:49,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150645797] [2021-06-05 14:02:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:49,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150645797] [2021-06-05 14:02:49,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150645797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435433822] [2021-06-05 14:02:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:02:49,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:49,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:02:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435433822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:49,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:02:49,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640890123] [2021-06-05 14:02:49,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:02:49,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:02:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:02:49,386 INFO L87 Difference]: Start difference. First operand 1515 states and 4629 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:02:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:49,464 INFO L93 Difference]: Finished difference Result 1871 states and 5337 transitions. [2021-06-05 14:02:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:02:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 14:02:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:49,466 INFO L225 Difference]: With dead ends: 1871 [2021-06-05 14:02:49,466 INFO L226 Difference]: Without dead ends: 1871 [2021-06-05 14:02:49,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:02:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-06-05 14:02:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1073. [2021-06-05 14:02:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-06-05 14:02:49,479 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-06-05 14:02:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:49,480 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-06-05 14:02:49,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:02:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-06-05 14:02:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:49,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:49,481 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:49,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:49,681 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1017308634, now seen corresponding path program 245 times [2021-06-05 14:02:49,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:49,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983429714] [2021-06-05 14:02:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:49,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:49,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983429714] [2021-06-05 14:02:49,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983429714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20569826] [2021-06-05 14:02:49,761 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 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 14:02:49,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:02:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:50,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:50,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:50,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:50,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:50,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:50,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20569826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:50,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:50,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:50,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452002346] [2021-06-05 14:02:50,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:50,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:50,724 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:51,107 INFO L93 Difference]: Finished difference Result 1252 states and 3621 transitions. [2021-06-05 14:02:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:51,109 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 14:02:51,109 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 14:02:51,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:02:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 14:02:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1073. [2021-06-05 14:02:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-06-05 14:02:51,128 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-06-05 14:02:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:51,128 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-06-05 14:02:51,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-06-05 14:02:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:51,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:51,130 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:51,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:51,330 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:51,331 INFO L82 PathProgramCache]: Analyzing trace with hash 136490107, now seen corresponding path program 246 times [2021-06-05 14:02:51,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:51,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073524684] [2021-06-05 14:02:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:51,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:51,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073524684] [2021-06-05 14:02:51,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073524684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:51,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037284791] [2021-06-05 14:02:51,370 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 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 14:02:51,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:02:51,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:02:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:51,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037284791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:51,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:51,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:02:51,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499237320] [2021-06-05 14:02:51,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:02:51,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:02:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:02:51,427 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:02:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:51,532 INFO L93 Difference]: Finished difference Result 1821 states and 5166 transitions. [2021-06-05 14:02:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:02:51,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 14:02:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:51,534 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 14:02:51,534 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 14:02:51,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 14:02:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1372. [2021-06-05 14:02:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.047410649161196) internal successors, (4178), 1371 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4178 transitions. [2021-06-05 14:02:51,549 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4178 transitions. Word has length 20 [2021-06-05 14:02:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:51,549 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4178 transitions. [2021-06-05 14:02:51,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:02:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4178 transitions. [2021-06-05 14:02:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:51,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:51,550 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:51,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10417,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:51,751 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:51,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1110932366, now seen corresponding path program 247 times [2021-06-05 14:02:51,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:51,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330380512] [2021-06-05 14:02:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:51,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:51,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330380512] [2021-06-05 14:02:51,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330380512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:51,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296845902] [2021-06-05 14:02:51,817 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 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 14:02:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:51,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:52,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:52,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:52,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:52,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:52,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:52,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:52,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296845902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:52,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:52,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:52,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296350698] [2021-06-05 14:02:52,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:52,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:52,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:52,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:52,673 INFO L87 Difference]: Start difference. First operand 1372 states and 4178 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:52,946 INFO L93 Difference]: Finished difference Result 1418 states and 4257 transitions. [2021-06-05 14:02:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:02:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:52,948 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 14:02:52,948 INFO L226 Difference]: Without dead ends: 1386 [2021-06-05 14:02:52,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-05 14:02:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1374. [2021-06-05 14:02:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0458849235251275) internal successors, (4182), 1373 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4182 transitions. [2021-06-05 14:02:52,961 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4182 transitions. Word has length 20 [2021-06-05 14:02:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4182 transitions. [2021-06-05 14:02:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4182 transitions. [2021-06-05 14:02:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:52,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:52,963 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:53,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10418 [2021-06-05 14:02:53,165 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash -519119568, now seen corresponding path program 248 times [2021-06-05 14:02:53,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:53,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215109004] [2021-06-05 14:02:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:53,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:53,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215109004] [2021-06-05 14:02:53,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215109004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:53,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725133427] [2021-06-05 14:02:53,230 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 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 14:02:53,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:53,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:53,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:53,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:53,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:53,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:53,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:53,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725133427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:53,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:53,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:02:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971563495] [2021-06-05 14:02:53,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:53,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:53,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:53,911 INFO L87 Difference]: Start difference. First operand 1374 states and 4182 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:54,188 INFO L93 Difference]: Finished difference Result 1463 states and 4324 transitions. [2021-06-05 14:02:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:02:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:54,191 INFO L225 Difference]: With dead ends: 1463 [2021-06-05 14:02:54,191 INFO L226 Difference]: Without dead ends: 1440 [2021-06-05 14:02:54,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:02:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-06-05 14:02:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1374. [2021-06-05 14:02:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0356882738528768) internal successors, (4168), 1373 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4168 transitions. [2021-06-05 14:02:54,205 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4168 transitions. Word has length 20 [2021-06-05 14:02:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:54,205 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4168 transitions. [2021-06-05 14:02:54,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:02:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4168 transitions. [2021-06-05 14:02:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:54,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:54,206 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:54,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10554 [2021-06-05 14:02:54,407 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1592204948, now seen corresponding path program 249 times [2021-06-05 14:02:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:54,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998504463] [2021-06-05 14:02:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:54,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998504463] [2021-06-05 14:02:54,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998504463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939218788] [2021-06-05 14:02:54,478 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 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 14:02:54,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:02:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:54,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:54,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:55,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:55,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:55,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:55,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:55,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939218788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:55,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:55,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:55,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841177661] [2021-06-05 14:02:55,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:55,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:55,077 INFO L87 Difference]: Start difference. First operand 1374 states and 4168 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:55,487 INFO L93 Difference]: Finished difference Result 1493 states and 4350 transitions. [2021-06-05 14:02:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:02:55,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:55,489 INFO L225 Difference]: With dead ends: 1493 [2021-06-05 14:02:55,489 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 14:02:55,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 14:02:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1374. [2021-06-05 14:02:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0276766205389656) internal successors, (4157), 1373 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4157 transitions. [2021-06-05 14:02:55,503 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4157 transitions. Word has length 20 [2021-06-05 14:02:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:55,503 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4157 transitions. [2021-06-05 14:02:55,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4157 transitions. [2021-06-05 14:02:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:55,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:55,504 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:55,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10652,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:55,705 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -498113360, now seen corresponding path program 250 times [2021-06-05 14:02:55,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:55,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445606284] [2021-06-05 14:02:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:55,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445606284] [2021-06-05 14:02:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445606284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522396361] [2021-06-05 14:02:55,780 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 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 14:02:55,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:56,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:56,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:56,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:56,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:56,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:56,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:56,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522396361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:56,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:56,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:02:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141279560] [2021-06-05 14:02:56,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:02:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:02:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:56,326 INFO L87 Difference]: Start difference. First operand 1374 states and 4157 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:56,572 INFO L93 Difference]: Finished difference Result 1523 states and 4457 transitions. [2021-06-05 14:02:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:02:56,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:02:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:56,573 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 14:02:56,573 INFO L226 Difference]: Without dead ends: 1508 [2021-06-05 14:02:56,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:02:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-06-05 14:02:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1374. [2021-06-05 14:02:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0269482884195194) internal successors, (4156), 1373 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4156 transitions. [2021-06-05 14:02:56,587 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4156 transitions. Word has length 20 [2021-06-05 14:02:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:56,587 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4156 transitions. [2021-06-05 14:02:56,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:02:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4156 transitions. [2021-06-05 14:02:56,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:56,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:56,588 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:56,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10749,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:56,789 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:56,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1134580214, now seen corresponding path program 251 times [2021-06-05 14:02:56,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:56,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855769856] [2021-06-05 14:02:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:56,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:56,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855769856] [2021-06-05 14:02:56,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855769856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:56,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530190459] [2021-06-05 14:02:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:02:56,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:02:56,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:56,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 14:02:56,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:57,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:57,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:58,264 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 260 [2021-06-05 14:02:58,391 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 260 [2021-06-05 14:02:58,513 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 264 [2021-06-05 14:02:58,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:58,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:58,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:58,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530190459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:58,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875759306] [2021-06-05 14:02:58,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:58,699 INFO L87 Difference]: Start difference. First operand 1374 states and 4156 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:02:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:59,167 INFO L93 Difference]: Finished difference Result 1525 states and 4427 transitions. [2021-06-05 14:02:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:02:59,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:02:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:59,168 INFO L225 Difference]: With dead ends: 1525 [2021-06-05 14:02:59,168 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 14:02:59,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 366.8ms TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:02:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 14:02:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1366. [2021-06-05 14:02:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0278388278388277) internal successors, (4133), 1365 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4133 transitions. [2021-06-05 14:02:59,182 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4133 transitions. Word has length 20 [2021-06-05 14:02:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:59,182 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4133 transitions. [2021-06-05 14:02:59,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:02:59,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4133 transitions. [2021-06-05 14:02:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:02:59,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:59,183 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:59,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10829,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:59,383 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2107998158, now seen corresponding path program 252 times [2021-06-05 14:02:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:59,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719040931] [2021-06-05 14:02:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:59,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:59,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719040931] [2021-06-05 14:02:59,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719040931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:59,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721780413] [2021-06-05 14:02:59,448 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 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 14:02:59,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:02:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:59,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:02:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:59,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:59,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:00,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:00,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:00,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:00,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721780413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:00,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:00,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:00,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979304417] [2021-06-05 14:03:00,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:00,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:00,037 INFO L87 Difference]: Start difference. First operand 1366 states and 4133 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 14:03:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:00,413 INFO L93 Difference]: Finished difference Result 1431 states and 4256 transitions. [2021-06-05 14:03:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:03:00,413 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 20 [2021-06-05 14:03:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:00,414 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 14:03:00,414 INFO L226 Difference]: Without dead ends: 1422 [2021-06-05 14:03:00,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:03:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-06-05 14:03:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1364. [2021-06-05 14:03:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-06-05 14:03:00,427 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-06-05 14:03:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:00,427 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-06-05 14:03:00,427 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 14:03:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-06-05 14:03:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:00,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:00,428 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:00,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11124 [2021-06-05 14:03:00,631 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:00,631 INFO L82 PathProgramCache]: Analyzing trace with hash 382518700, now seen corresponding path program 253 times [2021-06-05 14:03:00,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:00,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277279382] [2021-06-05 14:03:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:00,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277279382] [2021-06-05 14:03:00,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277279382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506599496] [2021-06-05 14:03:00,704 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 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 14:03:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:00,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:01,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:01,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:01,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:01,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:01,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506599496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:01,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:01,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226372100] [2021-06-05 14:03:01,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:01,519 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:01,841 INFO L93 Difference]: Finished difference Result 1429 states and 4239 transitions. [2021-06-05 14:03:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:03:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:01,843 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 14:03:01,843 INFO L226 Difference]: Without dead ends: 1424 [2021-06-05 14:03:01,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-06-05 14:03:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1364. [2021-06-05 14:03:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-06-05 14:03:01,857 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-06-05 14:03:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:01,857 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-06-05 14:03:01,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-06-05 14:03:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:01,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:01,859 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:02,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11209,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:02,059 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1871923696, now seen corresponding path program 254 times [2021-06-05 14:03:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:02,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085606516] [2021-06-05 14:03:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:02,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085606516] [2021-06-05 14:03:02,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085606516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751772295] [2021-06-05 14:03:02,132 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 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 14:03:02,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:02,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:02,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:02,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:03,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:03,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:03,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:03,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751772295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:03,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:03,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264709441] [2021-06-05 14:03:03,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:03,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:03,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:03,657 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:04,015 INFO L93 Difference]: Finished difference Result 1463 states and 4289 transitions. [2021-06-05 14:03:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:03:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:04,017 INFO L225 Difference]: With dead ends: 1463 [2021-06-05 14:03:04,017 INFO L226 Difference]: Without dead ends: 1440 [2021-06-05 14:03:04,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:03:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-06-05 14:03:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1366. [2021-06-05 14:03:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0065934065934066) internal successors, (4104), 1365 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4104 transitions. [2021-06-05 14:03:04,031 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4104 transitions. Word has length 20 [2021-06-05 14:03:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:04,031 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4104 transitions. [2021-06-05 14:03:04,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4104 transitions. [2021-06-05 14:03:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:04,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:04,033 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:04,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-06-05 14:03:04,237 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 980602065, now seen corresponding path program 255 times [2021-06-05 14:03:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:04,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053387587] [2021-06-05 14:03:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:04,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:04,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053387587] [2021-06-05 14:03:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053387587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:04,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620288597] [2021-06-05 14:03:04,272 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 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 14:03:04,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:04,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:04,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620288597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:04,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:04,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:03:04,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066160917] [2021-06-05 14:03:04,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:04,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:04,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:04,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:04,328 INFO L87 Difference]: Start difference. First operand 1366 states and 4104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:03:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:04,392 INFO L93 Difference]: Finished difference Result 1698 states and 4827 transitions. [2021-06-05 14:03:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:03:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-06-05 14:03:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:04,394 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 14:03:04,394 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 14:03:04,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:03:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 14:03:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1390. [2021-06-05 14:03:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-06-05 14:03:04,409 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-06-05 14:03:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:04,409 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-06-05 14:03:04,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:03:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-06-05 14:03:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:04,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:04,411 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:04,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11574,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:04,611 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:04,611 INFO L82 PathProgramCache]: Analyzing trace with hash 798838316, now seen corresponding path program 256 times [2021-06-05 14:03:04,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:04,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598692000] [2021-06-05 14:03:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:04,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:04,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598692000] [2021-06-05 14:03:04,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598692000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:04,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683422841] [2021-06-05 14:03:04,685 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 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 14:03:04,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:04,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:04,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:04,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:05,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:05,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:05,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:05,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:05,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683422841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:05,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:05,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:05,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848277931] [2021-06-05 14:03:05,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:05,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:05,434 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:05,739 INFO L93 Difference]: Finished difference Result 1514 states and 4411 transitions. [2021-06-05 14:03:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:05,741 INFO L225 Difference]: With dead ends: 1514 [2021-06-05 14:03:05,741 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 14:03:05,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 14:03:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1390. [2021-06-05 14:03:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-06-05 14:03:05,755 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-06-05 14:03:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:05,756 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-06-05 14:03:05,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-06-05 14:03:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:05,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:05,757 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:05,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11575 [2021-06-05 14:03:05,957 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1892929904, now seen corresponding path program 257 times [2021-06-05 14:03:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:05,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663078327] [2021-06-05 14:03:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:06,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663078327] [2021-06-05 14:03:06,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663078327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:06,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144387468] [2021-06-05 14:03:06,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:06,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:03:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:06,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:07,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:07,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:07,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:07,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:07,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144387468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:07,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:07,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:07,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754363201] [2021-06-05 14:03:07,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:07,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:07,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:07,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:07,423 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:07,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:07,796 INFO L93 Difference]: Finished difference Result 1554 states and 4501 transitions. [2021-06-05 14:03:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:07,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:07,798 INFO L225 Difference]: With dead ends: 1554 [2021-06-05 14:03:07,798 INFO L226 Difference]: Without dead ends: 1539 [2021-06-05 14:03:07,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-06-05 14:03:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1390. [2021-06-05 14:03:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0043196544276456) internal successors, (4173), 1389 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4173 transitions. [2021-06-05 14:03:07,811 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4173 transitions. Word has length 20 [2021-06-05 14:03:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:07,812 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4173 transitions. [2021-06-05 14:03:07,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4173 transitions. [2021-06-05 14:03:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:07,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:07,813 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:08,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11734,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:08,013 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1012111377, now seen corresponding path program 258 times [2021-06-05 14:03:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:08,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224216000] [2021-06-05 14:03:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:08,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224216000] [2021-06-05 14:03:08,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224216000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130453668] [2021-06-05 14:03:08,061 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 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 14:03:08,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:03:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:08,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130453668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:08,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:08,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:03:08,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542300427] [2021-06-05 14:03:08,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:03:08,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:08,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:03:08,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:08,114 INFO L87 Difference]: Start difference. First operand 1390 states and 4173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:08,206 INFO L93 Difference]: Finished difference Result 2615 states and 7716 transitions. [2021-06-05 14:03:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:03:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 14:03:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:08,208 INFO L225 Difference]: With dead ends: 2615 [2021-06-05 14:03:08,208 INFO L226 Difference]: Without dead ends: 2615 [2021-06-05 14:03:08,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:03:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-06-05 14:03:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2343. [2021-06-05 14:03:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-06-05 14:03:08,233 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-06-05 14:03:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:08,233 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-06-05 14:03:08,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-06-05 14:03:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:08,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:08,235 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:08,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11908 [2021-06-05 14:03:08,436 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030764, now seen corresponding path program 259 times [2021-06-05 14:03:08,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:08,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083980560] [2021-06-05 14:03:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:08,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:08,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083980560] [2021-06-05 14:03:08,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083980560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:08,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420308827] [2021-06-05 14:03:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:08,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:08,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:09,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:09,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:09,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:09,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:09,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420308827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:09,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:09,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:09,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843976286] [2021-06-05 14:03:09,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:09,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:09,577 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:09,992 INFO L93 Difference]: Finished difference Result 2710 states and 8145 transitions. [2021-06-05 14:03:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:03:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:09,995 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 14:03:09,995 INFO L226 Difference]: Without dead ends: 2705 [2021-06-05 14:03:09,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-06-05 14:03:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2343. [2021-06-05 14:03:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-06-05 14:03:10,021 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-06-05 14:03:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:10,021 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-06-05 14:03:10,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-06-05 14:03:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:10,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:10,023 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:10,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11909 [2021-06-05 14:03:10,224 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:10,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1799720981, now seen corresponding path program 260 times [2021-06-05 14:03:10,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:10,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854115295] [2021-06-05 14:03:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:10,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:10,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854115295] [2021-06-05 14:03:10,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854115295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:10,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511947277] [2021-06-05 14:03:10,267 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 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 14:03:10,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:10,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511947277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:10,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:10,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:03:10,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247242875] [2021-06-05 14:03:10,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:03:10,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:10,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:03:10,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:10,318 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:10,456 INFO L93 Difference]: Finished difference Result 3338 states and 9885 transitions. [2021-06-05 14:03:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 14:03:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:10,459 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 14:03:10,459 INFO L226 Difference]: Without dead ends: 3338 [2021-06-05 14:03:10,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:03:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-06-05 14:03:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2994. [2021-06-05 14:03:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 3.05913798864016) internal successors, (9156), 2993 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 9156 transitions. [2021-06-05 14:03:10,492 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 9156 transitions. Word has length 20 [2021-06-05 14:03:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:10,492 INFO L482 AbstractCegarLoop]: Abstraction has 2994 states and 9156 transitions. [2021-06-05 14:03:10,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 9156 transitions. [2021-06-05 14:03:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:10,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:10,495 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:10,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12064,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:10,695 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1377490808, now seen corresponding path program 261 times [2021-06-05 14:03:10,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:10,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699500035] [2021-06-05 14:03:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699500035] [2021-06-05 14:03:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699500035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429760204] [2021-06-05 14:03:10,771 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 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 14:03:10,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:10,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:10,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:11,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:11,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:11,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:11,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:11,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:11,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:11,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429760204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:11,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:11,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:11,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155206014] [2021-06-05 14:03:11,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:11,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:11,466 INFO L87 Difference]: Start difference. First operand 2994 states and 9156 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) 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 14:03:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:11,803 INFO L93 Difference]: Finished difference Result 3056 states and 9275 transitions. [2021-06-05 14:03:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) 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 20 [2021-06-05 14:03:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:11,806 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 14:03:11,806 INFO L226 Difference]: Without dead ends: 3044 [2021-06-05 14:03:11,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-06-05 14:03:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2990. [2021-06-05 14:03:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 3.0595516895282704) internal successors, (9145), 2989 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 9145 transitions. [2021-06-05 14:03:11,836 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 9145 transitions. Word has length 20 [2021-06-05 14:03:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:11,836 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 9145 transitions. [2021-06-05 14:03:11,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) 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 14:03:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 9145 transitions. [2021-06-05 14:03:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:11,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:11,838 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:12,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12065 [2021-06-05 14:03:12,039 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1065396758, now seen corresponding path program 262 times [2021-06-05 14:03:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:12,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774837786] [2021-06-05 14:03:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:12,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774837786] [2021-06-05 14:03:12,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774837786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606105384] [2021-06-05 14:03:12,110 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 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 14:03:12,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:12,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:12,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:12,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:12,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:12,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:12,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:12,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:12,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:12,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:12,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606105384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:12,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:12,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:12,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952335259] [2021-06-05 14:03:12,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:12,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:12,762 INFO L87 Difference]: Start difference. First operand 2990 states and 9145 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:13,064 INFO L93 Difference]: Finished difference Result 3075 states and 9279 transitions. [2021-06-05 14:03:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:13,067 INFO L225 Difference]: With dead ends: 3075 [2021-06-05 14:03:13,067 INFO L226 Difference]: Without dead ends: 3062 [2021-06-05 14:03:13,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-06-05 14:03:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2992. [2021-06-05 14:03:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.051822133065864) internal successors, (9128), 2991 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9128 transitions. [2021-06-05 14:03:13,097 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9128 transitions. Word has length 20 [2021-06-05 14:03:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:13,097 INFO L482 AbstractCegarLoop]: Abstraction has 2992 states and 9128 transitions. [2021-06-05 14:03:13,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9128 transitions. [2021-06-05 14:03:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:13,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:13,100 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:13,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12147 [2021-06-05 14:03:13,300 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2135478950, now seen corresponding path program 263 times [2021-06-05 14:03:13,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:13,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060335038] [2021-06-05 14:03:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:13,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060335038] [2021-06-05 14:03:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060335038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15131915] [2021-06-05 14:03:13,380 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 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 14:03:13,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:03:13,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:13,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:13,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:13,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:14,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:14,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:14,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:14,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:14,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15131915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:14,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633625742] [2021-06-05 14:03:14,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:14,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:14,380 INFO L87 Difference]: Start difference. First operand 2992 states and 9128 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:14,697 INFO L93 Difference]: Finished difference Result 3101 states and 9293 transitions. [2021-06-05 14:03:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:14,700 INFO L225 Difference]: With dead ends: 3101 [2021-06-05 14:03:14,701 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 14:03:14,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 14:03:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2982. [2021-06-05 14:03:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-06-05 14:03:14,731 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-06-05 14:03:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:14,731 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-06-05 14:03:14,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-06-05 14:03:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:14,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:14,734 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:14,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12254,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:14,934 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1716589206, now seen corresponding path program 264 times [2021-06-05 14:03:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:14,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637990361] [2021-06-05 14:03:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:15,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:15,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637990361] [2021-06-05 14:03:15,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637990361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:15,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968474271] [2021-06-05 14:03:15,017 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 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 14:03:15,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:15,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:15,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:15,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:15,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:15,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:15,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:15,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:15,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:15,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:15,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968474271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:15,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:15,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:15,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751648359] [2021-06-05 14:03:15,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:15,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:15,683 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:16,080 INFO L93 Difference]: Finished difference Result 3164 states and 9474 transitions. [2021-06-05 14:03:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:03:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:16,084 INFO L225 Difference]: With dead ends: 3164 [2021-06-05 14:03:16,084 INFO L226 Difference]: Without dead ends: 3159 [2021-06-05 14:03:16,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-06-05 14:03:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2982. [2021-06-05 14:03:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-06-05 14:03:16,115 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-06-05 14:03:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:16,115 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-06-05 14:03:16,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-06-05 14:03:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:16,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:16,117 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:16,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12347 [2021-06-05 14:03:16,317 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:16,318 INFO L82 PathProgramCache]: Analyzing trace with hash -72987268, now seen corresponding path program 265 times [2021-06-05 14:03:16,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:16,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125239520] [2021-06-05 14:03:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:16,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:16,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125239520] [2021-06-05 14:03:16,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125239520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:16,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494318358] [2021-06-05 14:03:16,383 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 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 14:03:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:16,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:16,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:16,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:16,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:17,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:17,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:17,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:17,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494318358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:17,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:17,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:17,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33357350] [2021-06-05 14:03:17,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:17,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:17,193 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 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 14:03:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:17,548 INFO L93 Difference]: Finished difference Result 3032 states and 9158 transitions. [2021-06-05 14:03:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:03:17,549 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 20 [2021-06-05 14:03:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:17,551 INFO L225 Difference]: With dead ends: 3032 [2021-06-05 14:03:17,551 INFO L226 Difference]: Without dead ends: 3022 [2021-06-05 14:03:17,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-05 14:03:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2982. [2021-06-05 14:03:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-06-05 14:03:17,583 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-06-05 14:03:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:17,583 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-06-05 14:03:17,583 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 14:03:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-06-05 14:03:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:17,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:17,585 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:17,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12441,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:17,786 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -834014084, now seen corresponding path program 266 times [2021-06-05 14:03:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611256079] [2021-06-05 14:03:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:17,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:17,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611256079] [2021-06-05 14:03:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611256079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:17,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659747194] [2021-06-05 14:03:17,871 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 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 14:03:17,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:18,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:18,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:19,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:19,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:19,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:19,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:19,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659747194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:19,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:19,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:19,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965478921] [2021-06-05 14:03:19,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:19,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:19,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:19,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:19,023 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:19,443 INFO L93 Difference]: Finished difference Result 3204 states and 9569 transitions. [2021-06-05 14:03:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:19,447 INFO L225 Difference]: With dead ends: 3204 [2021-06-05 14:03:19,447 INFO L226 Difference]: Without dead ends: 3187 [2021-06-05 14:03:19,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-06-05 14:03:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2982. [2021-06-05 14:03:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-06-05 14:03:19,478 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-06-05 14:03:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:19,478 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-06-05 14:03:19,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-06-05 14:03:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:19,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:19,480 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:19,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12564 [2021-06-05 14:03:19,680 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash -812513544, now seen corresponding path program 267 times [2021-06-05 14:03:19,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:19,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277741159] [2021-06-05 14:03:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:19,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277741159] [2021-06-05 14:03:19,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277741159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729077060] [2021-06-05 14:03:19,748 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 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 14:03:19,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:19,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:20,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:20,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:20,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:20,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:20,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:20,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:20,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729077060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:20,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:20,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:20,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917700028] [2021-06-05 14:03:20,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:20,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:20,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:20,318 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 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 14:03:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:20,595 INFO L93 Difference]: Finished difference Result 3020 states and 9115 transitions. [2021-06-05 14:03:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:03:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:03:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:20,598 INFO L225 Difference]: With dead ends: 3020 [2021-06-05 14:03:20,598 INFO L226 Difference]: Without dead ends: 3015 [2021-06-05 14:03:20,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:03:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-06-05 14:03:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2982. [2021-06-05 14:03:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-06-05 14:03:20,645 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-06-05 14:03:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:20,645 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-06-05 14:03:20,645 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 14:03:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-06-05 14:03:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:20,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:20,647 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:20,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12703,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:20,848 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1756974294, now seen corresponding path program 268 times [2021-06-05 14:03:20,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:20,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846005135] [2021-06-05 14:03:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:20,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:20,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846005135] [2021-06-05 14:03:20,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846005135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:20,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136759042] [2021-06-05 14:03:20,928 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 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 14:03:20,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:20,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:21,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:21,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:21,768 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 231 [2021-06-05 14:03:21,872 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 193 [2021-06-05 14:03:22,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:22,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:22,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:22,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:22,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136759042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:22,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:22,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:22,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104135154] [2021-06-05 14:03:22,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:22,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:22,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:22,263 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:22,680 INFO L93 Difference]: Finished difference Result 3037 states and 9140 transitions. [2021-06-05 14:03:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:03:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:22,683 INFO L225 Difference]: With dead ends: 3037 [2021-06-05 14:03:22,683 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 14:03:22,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 14:03:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2982. [2021-06-05 14:03:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-06-05 14:03:22,714 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-06-05 14:03:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:22,715 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-06-05 14:03:22,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-06-05 14:03:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:22,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:22,717 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:22,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12800 [2021-06-05 14:03:22,917 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1048588006, now seen corresponding path program 269 times [2021-06-05 14:03:22,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:22,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848724918] [2021-06-05 14:03:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:22,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:22,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848724918] [2021-06-05 14:03:22,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848724918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:22,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980792799] [2021-06-05 14:03:22,984 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 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 14:03:23,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:03:23,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:23,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:23,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:23,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:23,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:23,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:23,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980792799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:23,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:23,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033596363] [2021-06-05 14:03:23,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:23,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:23,445 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:23,738 INFO L93 Difference]: Finished difference Result 3082 states and 9238 transitions. [2021-06-05 14:03:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:23,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:03:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:23,741 INFO L225 Difference]: With dead ends: 3082 [2021-06-05 14:03:23,741 INFO L226 Difference]: Without dead ends: 3077 [2021-06-05 14:03:23,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-06-05 14:03:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2982. [2021-06-05 14:03:23,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-06-05 14:03:23,771 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-06-05 14:03:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:23,771 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-06-05 14:03:23,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-06-05 14:03:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:23,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:23,773 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:23,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12987,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:23,974 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2121673386, now seen corresponding path program 270 times [2021-06-05 14:03:23,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:23,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266759453] [2021-06-05 14:03:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:24,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:24,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266759453] [2021-06-05 14:03:24,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266759453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:24,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513584180] [2021-06-05 14:03:24,050 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 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 14:03:24,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:24,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:24,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:24,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:24,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:24,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:24,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:24,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513584180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:24,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:24,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:24,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340825000] [2021-06-05 14:03:24,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:24,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:24,643 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:24,992 INFO L93 Difference]: Finished difference Result 3139 states and 9381 transitions. [2021-06-05 14:03:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:24,995 INFO L225 Difference]: With dead ends: 3139 [2021-06-05 14:03:24,996 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 14:03:24,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 14:03:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2986. [2021-06-05 14:03:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.0268006700167502) internal successors, (9035), 2985 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 9035 transitions. [2021-06-05 14:03:25,027 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 9035 transitions. Word has length 20 [2021-06-05 14:03:25,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:25,027 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 9035 transitions. [2021-06-05 14:03:25,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 9035 transitions. [2021-06-05 14:03:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:25,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:25,029 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:25,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13063,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:25,230 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1402054059, now seen corresponding path program 271 times [2021-06-05 14:03:25,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:25,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002345627] [2021-06-05 14:03:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:25,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:25,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002345627] [2021-06-05 14:03:25,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002345627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:25,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350345225] [2021-06-05 14:03:25,268 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 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 14:03:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:25,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350345225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:25,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:25,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:03:25,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379281319] [2021-06-05 14:03:25,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:03:25,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:03:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:25,323 INFO L87 Difference]: Start difference. First operand 2986 states and 9035 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:25,410 INFO L93 Difference]: Finished difference Result 3429 states and 10006 transitions. [2021-06-05 14:03:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:03:25,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 14:03:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:25,414 INFO L225 Difference]: With dead ends: 3429 [2021-06-05 14:03:25,414 INFO L226 Difference]: Without dead ends: 3429 [2021-06-05 14:03:25,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-06-05 14:03:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2845. [2021-06-05 14:03:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-06-05 14:03:25,446 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-06-05 14:03:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:25,446 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-06-05 14:03:25,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-06-05 14:03:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:25,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:25,448 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:25,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13145,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:25,648 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1027581798, now seen corresponding path program 272 times [2021-06-05 14:03:25,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:25,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384165474] [2021-06-05 14:03:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:25,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384165474] [2021-06-05 14:03:25,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384165474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336513148] [2021-06-05 14:03:25,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:25,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:25,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:25,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:25,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:26,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:26,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:26,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:26,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:26,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336513148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:26,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:26,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:26,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722290954] [2021-06-05 14:03:26,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:26,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:26,674 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:27,040 INFO L93 Difference]: Finished difference Result 3008 states and 8868 transitions. [2021-06-05 14:03:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:03:27,040 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:27,042 INFO L225 Difference]: With dead ends: 3008 [2021-06-05 14:03:27,042 INFO L226 Difference]: Without dead ends: 3003 [2021-06-05 14:03:27,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-06-05 14:03:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2845. [2021-06-05 14:03:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-06-05 14:03:27,081 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-06-05 14:03:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:27,081 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-06-05 14:03:27,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-06-05 14:03:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:27,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:27,083 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:27,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13146 [2021-06-05 14:03:27,284 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:27,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1908400325, now seen corresponding path program 273 times [2021-06-05 14:03:27,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:27,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765009404] [2021-06-05 14:03:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:27,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:27,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765009404] [2021-06-05 14:03:27,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765009404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382754594] [2021-06-05 14:03:27,327 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 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 14:03:27,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:27,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382754594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:27,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:03:27,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430793292] [2021-06-05 14:03:27,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:03:27,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:03:27,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:27,393 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:27,470 INFO L93 Difference]: Finished difference Result 3840 states and 11378 transitions. [2021-06-05 14:03:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:03:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-06-05 14:03:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:27,473 INFO L225 Difference]: With dead ends: 3840 [2021-06-05 14:03:27,473 INFO L226 Difference]: Without dead ends: 3840 [2021-06-05 14:03:27,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:03:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2021-06-05 14:03:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 3571. [2021-06-05 14:03:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0103641456582633) internal successors, (10747), 3570 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10747 transitions. [2021-06-05 14:03:27,516 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10747 transitions. Word has length 20 [2021-06-05 14:03:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:27,516 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 10747 transitions. [2021-06-05 14:03:27,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:03:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10747 transitions. [2021-06-05 14:03:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:27,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:27,518 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:27,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13255,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:27,719 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1470480938, now seen corresponding path program 274 times [2021-06-05 14:03:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:27,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647122665] [2021-06-05 14:03:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:27,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647122665] [2021-06-05 14:03:27,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647122665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900579101] [2021-06-05 14:03:27,802 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 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 14:03:27,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:27,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:27,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:28,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:28,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:28,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:28,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:28,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:28,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:28,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900579101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:28,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:28,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:28,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223362019] [2021-06-05 14:03:28,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:28,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:28,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:28,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:28,957 INFO L87 Difference]: Start difference. First operand 3571 states and 10747 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:29,325 INFO L93 Difference]: Finished difference Result 3789 states and 11234 transitions. [2021-06-05 14:03:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:29,329 INFO L225 Difference]: With dead ends: 3789 [2021-06-05 14:03:29,329 INFO L226 Difference]: Without dead ends: 3772 [2021-06-05 14:03:29,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-06-05 14:03:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3571. [2021-06-05 14:03:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0095238095238095) internal successors, (10744), 3570 states have internal predecessors, (10744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10744 transitions. [2021-06-05 14:03:29,367 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10744 transitions. Word has length 20 [2021-06-05 14:03:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:29,367 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 10744 transitions. [2021-06-05 14:03:29,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10744 transitions. [2021-06-05 14:03:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:29,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:29,370 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:29,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13256 [2021-06-05 14:03:29,570 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:29,570 INFO L82 PathProgramCache]: Analyzing trace with hash -425265387, now seen corresponding path program 275 times [2021-06-05 14:03:29,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:29,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950239006] [2021-06-05 14:03:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:29,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:29,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950239006] [2021-06-05 14:03:29,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950239006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:29,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364171239] [2021-06-05 14:03:29,614 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 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 14:03:29,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364171239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:29,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:29,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:03:29,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000109041] [2021-06-05 14:03:29,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:03:29,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:03:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:03:29,669 INFO L87 Difference]: Start difference. First operand 3571 states and 10744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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 14:03:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:29,781 INFO L93 Difference]: Finished difference Result 3935 states and 11615 transitions. [2021-06-05 14:03:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:03:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 20 [2021-06-05 14:03:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:29,784 INFO L225 Difference]: With dead ends: 3935 [2021-06-05 14:03:29,784 INFO L226 Difference]: Without dead ends: 3935 [2021-06-05 14:03:29,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-05 14:03:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3315. [2021-06-05 14:03:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-06-05 14:03:29,836 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-06-05 14:03:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:29,836 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-06-05 14:03:29,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 14:03:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-06-05 14:03:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:29,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:29,838 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:30,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13470,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:30,039 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:30,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1979514906, now seen corresponding path program 276 times [2021-06-05 14:03:30,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:30,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295500802] [2021-06-05 14:03:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:30,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:30,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295500802] [2021-06-05 14:03:30,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295500802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:30,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765131025] [2021-06-05 14:03:30,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:30,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:03:30,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:30,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:30,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:30,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:30,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:30,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:30,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:30,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:30,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765131025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:30,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:30,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:30,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733264464] [2021-06-05 14:03:30,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:30,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:30,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:30,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:30,589 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:30,943 INFO L93 Difference]: Finished difference Result 3697 states and 10990 transitions. [2021-06-05 14:03:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:30,947 INFO L225 Difference]: With dead ends: 3697 [2021-06-05 14:03:30,947 INFO L226 Difference]: Without dead ends: 3692 [2021-06-05 14:03:30,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-06-05 14:03:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3315. [2021-06-05 14:03:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-06-05 14:03:30,983 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-06-05 14:03:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:30,983 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-06-05 14:03:30,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-06-05 14:03:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:30,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:30,986 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:31,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13471,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:31,186 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1692722565, now seen corresponding path program 277 times [2021-06-05 14:03:31,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:31,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401301411] [2021-06-05 14:03:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:31,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:31,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401301411] [2021-06-05 14:03:31,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401301411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:31,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294341938] [2021-06-05 14:03:31,232 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 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 14:03:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:31,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294341938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:31,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:31,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:03:31,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456295089] [2021-06-05 14:03:31,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:03:31,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:31,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:03:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:03:31,285 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) 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 14:03:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:31,452 INFO L93 Difference]: Finished difference Result 3902 states and 11479 transitions. [2021-06-05 14:03:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:03:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 20 [2021-06-05 14:03:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:31,455 INFO L225 Difference]: With dead ends: 3902 [2021-06-05 14:03:31,456 INFO L226 Difference]: Without dead ends: 3902 [2021-06-05 14:03:31,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-06-05 14:03:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3561. [2021-06-05 14:03:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0095505617977527) internal successors, (10714), 3560 states have internal predecessors, (10714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10714 transitions. [2021-06-05 14:03:31,496 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10714 transitions. Word has length 20 [2021-06-05 14:03:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:31,496 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10714 transitions. [2021-06-05 14:03:31,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) 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 14:03:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10714 transitions. [2021-06-05 14:03:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:31,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:31,498 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:31,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13539,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:31,699 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1050867918, now seen corresponding path program 278 times [2021-06-05 14:03:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:31,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669051700] [2021-06-05 14:03:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:31,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:31,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669051700] [2021-06-05 14:03:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669051700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:31,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667249494] [2021-06-05 14:03:31,788 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 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 14:03:31,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:31,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:31,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:32,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:32,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:32,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:32,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:32,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:32,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:32,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667249494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:32,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:32,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:32,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787336790] [2021-06-05 14:03:32,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:32,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:32,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:32,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:32,351 INFO L87 Difference]: Start difference. First operand 3561 states and 10714 transitions. Second operand has 25 states, 25 states have (on average 1.4) 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 14:03:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:32,807 INFO L93 Difference]: Finished difference Result 3658 states and 10896 transitions. [2021-06-05 14:03:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) 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 20 [2021-06-05 14:03:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:32,811 INFO L225 Difference]: With dead ends: 3658 [2021-06-05 14:03:32,811 INFO L226 Difference]: Without dead ends: 3642 [2021-06-05 14:03:32,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-06-05 14:03:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3561. [2021-06-05 14:03:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0070224719101124) internal successors, (10705), 3560 states have internal predecessors, (10705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10705 transitions. [2021-06-05 14:03:32,849 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10705 transitions. Word has length 20 [2021-06-05 14:03:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:32,849 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10705 transitions. [2021-06-05 14:03:32,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) 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 14:03:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10705 transitions. [2021-06-05 14:03:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:32,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:32,852 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:33,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13540,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:33,052 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1354204688, now seen corresponding path program 279 times [2021-06-05 14:03:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744927278] [2021-06-05 14:03:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:33,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:33,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744927278] [2021-06-05 14:03:33,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744927278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:33,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225351177] [2021-06-05 14:03:33,125 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 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 14:03:33,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:03:33,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:33,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:33,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:34,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:34,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:34,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:34,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:34,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225351177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:34,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91236117] [2021-06-05 14:03:34,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:34,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:34,267 INFO L87 Difference]: Start difference. First operand 3561 states and 10705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:34,632 INFO L93 Difference]: Finished difference Result 3663 states and 10877 transitions. [2021-06-05 14:03:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:34,636 INFO L225 Difference]: With dead ends: 3663 [2021-06-05 14:03:34,636 INFO L226 Difference]: Without dead ends: 3648 [2021-06-05 14:03:34,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-06-05 14:03:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3561. [2021-06-05 14:03:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9985955056179776) internal successors, (10675), 3560 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10675 transitions. [2021-06-05 14:03:34,674 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10675 transitions. Word has length 20 [2021-06-05 14:03:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:34,674 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10675 transitions. [2021-06-05 14:03:34,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10675 transitions. [2021-06-05 14:03:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:34,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:34,677 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13618,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:34,877 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1797103828, now seen corresponding path program 280 times [2021-06-05 14:03:34,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:34,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089955729] [2021-06-05 14:03:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:34,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:34,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089955729] [2021-06-05 14:03:34,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089955729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732848294] [2021-06-05 14:03:34,960 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 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 14:03:35,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:35,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:35,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:36,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:36,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:36,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:36,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:36,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732848294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:36,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:36,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171922177] [2021-06-05 14:03:36,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:36,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:36,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:36,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:36,077 INFO L87 Difference]: Start difference. First operand 3561 states and 10675 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:36,465 INFO L93 Difference]: Finished difference Result 3677 states and 10845 transitions. [2021-06-05 14:03:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:03:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:36,468 INFO L225 Difference]: With dead ends: 3677 [2021-06-05 14:03:36,469 INFO L226 Difference]: Without dead ends: 3660 [2021-06-05 14:03:36,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-06-05 14:03:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3561. [2021-06-05 14:03:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-06-05 14:03:36,510 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-06-05 14:03:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:36,510 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-06-05 14:03:36,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-06-05 14:03:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:36,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:36,513 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:36,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13787 [2021-06-05 14:03:36,713 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1652892016, now seen corresponding path program 281 times [2021-06-05 14:03:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:36,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849272648] [2021-06-05 14:03:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:36,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:36,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849272648] [2021-06-05 14:03:36,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849272648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:36,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524934423] [2021-06-05 14:03:36,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:36,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:36,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:36,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:37,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:37,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:38,039 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 224 [2021-06-05 14:03:38,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:38,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:38,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:38,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:38,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524934423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:38,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:38,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881549526] [2021-06-05 14:03:38,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:38,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:38,290 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:38,650 INFO L93 Difference]: Finished difference Result 3666 states and 10779 transitions. [2021-06-05 14:03:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:03:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:38,654 INFO L225 Difference]: With dead ends: 3666 [2021-06-05 14:03:38,654 INFO L226 Difference]: Without dead ends: 3661 [2021-06-05 14:03:38,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-05 14:03:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3561. [2021-06-05 14:03:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-06-05 14:03:38,691 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-06-05 14:03:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:38,691 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-06-05 14:03:38,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-06-05 14:03:38,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:38,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:38,694 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:38,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13950 [2021-06-05 14:03:38,895 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:38,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:38,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2136066476, now seen corresponding path program 282 times [2021-06-05 14:03:38,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:38,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639175759] [2021-06-05 14:03:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:38,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639175759] [2021-06-05 14:03:38,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639175759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451052402] [2021-06-05 14:03:38,970 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 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 14:03:38,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:03:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:38,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:39,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:39,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:39,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:39,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:39,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451052402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:39,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:39,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846952891] [2021-06-05 14:03:39,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:39,558 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) 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 14:03:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:39,905 INFO L93 Difference]: Finished difference Result 3633 states and 10776 transitions. [2021-06-05 14:03:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:03:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) 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 20 [2021-06-05 14:03:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:39,909 INFO L225 Difference]: With dead ends: 3633 [2021-06-05 14:03:39,909 INFO L226 Difference]: Without dead ends: 3623 [2021-06-05 14:03:39,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-06-05 14:03:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3565. [2021-06-05 14:03:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.98625140291807) internal successors, (10643), 3564 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10643 transitions. [2021-06-05 14:03:39,949 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10643 transitions. Word has length 20 [2021-06-05 14:03:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:39,949 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10643 transitions. [2021-06-05 14:03:39,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) 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 14:03:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10643 transitions. [2021-06-05 14:03:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:39,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:39,952 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:40,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14171,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:40,152 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash -106398646, now seen corresponding path program 283 times [2021-06-05 14:03:40,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:40,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941213694] [2021-06-05 14:03:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:40,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:40,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941213694] [2021-06-05 14:03:40,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941213694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:40,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732316161] [2021-06-05 14:03:40,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:40,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:40,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:40,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:41,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:41,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:41,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:41,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:41,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732316161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:41,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:41,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:41,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325350404] [2021-06-05 14:03:41,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:41,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:41,045 INFO L87 Difference]: Start difference. First operand 3565 states and 10643 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:41,415 INFO L93 Difference]: Finished difference Result 3684 states and 10816 transitions. [2021-06-05 14:03:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:03:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:41,420 INFO L225 Difference]: With dead ends: 3684 [2021-06-05 14:03:41,420 INFO L226 Difference]: Without dead ends: 3665 [2021-06-05 14:03:41,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-06-05 14:03:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3565. [2021-06-05 14:03:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-06-05 14:03:41,461 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-06-05 14:03:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:41,461 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-06-05 14:03:41,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-06-05 14:03:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:41,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:41,464 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:41,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14254,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:41,664 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1154063090, now seen corresponding path program 284 times [2021-06-05 14:03:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:41,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461105154] [2021-06-05 14:03:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:41,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461105154] [2021-06-05 14:03:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461105154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494709877] [2021-06-05 14:03:41,742 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 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 14:03:41,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:41,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:42,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:42,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:42,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:42,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:42,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:42,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494709877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:42,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:42,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:42,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243777138] [2021-06-05 14:03:42,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:42,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:42,697 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 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 14:03:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:42,936 INFO L93 Difference]: Finished difference Result 3609 states and 10719 transitions. [2021-06-05 14:03:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:42,937 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 20 [2021-06-05 14:03:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:42,940 INFO L225 Difference]: With dead ends: 3609 [2021-06-05 14:03:42,940 INFO L226 Difference]: Without dead ends: 3604 [2021-06-05 14:03:42,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-06-05 14:03:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3565. [2021-06-05 14:03:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-06-05 14:03:42,980 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-06-05 14:03:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:42,980 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-06-05 14:03:42,980 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 14:03:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-06-05 14:03:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:42,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:42,983 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:43,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14391,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:43,183 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1415424748, now seen corresponding path program 285 times [2021-06-05 14:03:43,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:43,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407262719] [2021-06-05 14:03:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:43,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407262719] [2021-06-05 14:03:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407262719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655115285] [2021-06-05 14:03:43,251 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 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 14:03:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:43,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:43,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:43,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:43,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:43,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:43,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:43,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:43,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655115285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:43,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:43,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192079851] [2021-06-05 14:03:43,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:43,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:43,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:43,910 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:44,205 INFO L93 Difference]: Finished difference Result 3624 states and 10731 transitions. [2021-06-05 14:03:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:03:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:44,209 INFO L225 Difference]: With dead ends: 3624 [2021-06-05 14:03:44,209 INFO L226 Difference]: Without dead ends: 3619 [2021-06-05 14:03:44,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-06-05 14:03:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3565. [2021-06-05 14:03:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-06-05 14:03:44,248 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-06-05 14:03:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:44,248 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-06-05 14:03:44,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-06-05 14:03:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:44,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:44,251 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:44,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14560 [2021-06-05 14:03:44,452 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash -220599381, now seen corresponding path program 286 times [2021-06-05 14:03:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:44,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226285379] [2021-06-05 14:03:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:44,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:44,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226285379] [2021-06-05 14:03:44,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226285379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:44,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142094698] [2021-06-05 14:03:44,484 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 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 14:03:44,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142094698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:44,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:44,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:03:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667806923] [2021-06-05 14:03:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:03:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:03:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:03:44,540 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 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 14:03:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:44,620 INFO L93 Difference]: Finished difference Result 4289 states and 12569 transitions. [2021-06-05 14:03:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:03:44,621 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 20 [2021-06-05 14:03:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:44,625 INFO L225 Difference]: With dead ends: 4289 [2021-06-05 14:03:44,625 INFO L226 Difference]: Without dead ends: 4289 [2021-06-05 14:03:44,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:03:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-06-05 14:03:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3974. [2021-06-05 14:03:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-06-05 14:03:44,678 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-06-05 14:03:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:44,678 INFO L482 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-06-05 14:03:44,678 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 14:03:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-06-05 14:03:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:44,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:44,682 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:44,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14660,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:44,885 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1390137552, now seen corresponding path program 287 times [2021-06-05 14:03:44,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:44,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829398834] [2021-06-05 14:03:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:44,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829398834] [2021-06-05 14:03:44,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829398834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574727833] [2021-06-05 14:03:44,952 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 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 14:03:44,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:45,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:45,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:46,318 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 202 [2021-06-05 14:03:46,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:46,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:46,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:46,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:46,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574727833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:46,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:46,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:46,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884781954] [2021-06-05 14:03:46,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:46,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:46,629 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:46,942 INFO L93 Difference]: Finished difference Result 4051 states and 12046 transitions. [2021-06-05 14:03:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:03:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:46,946 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 14:03:46,946 INFO L226 Difference]: Without dead ends: 4046 [2021-06-05 14:03:46,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-06-05 14:03:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3974. [2021-06-05 14:03:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-06-05 14:03:46,991 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-06-05 14:03:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:46,991 INFO L482 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-06-05 14:03:46,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-06-05 14:03:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:46,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:46,994 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:47,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14661,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:47,195 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2013508113, now seen corresponding path program 288 times [2021-06-05 14:03:47,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:47,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520180460] [2021-06-05 14:03:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520180460] [2021-06-05 14:03:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520180460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226639468] [2021-06-05 14:03:47,228 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 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 14:03:47,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:03:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:47,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:47,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:47,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226639468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:47,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:47,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:03:47,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705439772] [2021-06-05 14:03:47,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:47,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:47,286 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:47,390 INFO L93 Difference]: Finished difference Result 4435 states and 12955 transitions. [2021-06-05 14:03:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:03:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-05 14:03:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:47,394 INFO L225 Difference]: With dead ends: 4435 [2021-06-05 14:03:47,394 INFO L226 Difference]: Without dead ends: 4435 [2021-06-05 14:03:47,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:03:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-06-05 14:03:47,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3990. [2021-06-05 14:03:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-06-05 14:03:47,441 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-06-05 14:03:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:47,441 INFO L482 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-06-05 14:03:47,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-06-05 14:03:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:47,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:47,444 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:47,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14891,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:47,644 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1831744364, now seen corresponding path program 289 times [2021-06-05 14:03:47,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824001662] [2021-06-05 14:03:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:47,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824001662] [2021-06-05 14:03:47,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824001662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315442246] [2021-06-05 14:03:47,711 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 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 14:03:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:47,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:47,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:47,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:48,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:48,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:48,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:48,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:48,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315442246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:48,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:48,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873672789] [2021-06-05 14:03:48,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:48,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:48,543 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:48,887 INFO L93 Difference]: Finished difference Result 4136 states and 12254 transitions. [2021-06-05 14:03:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 20 [2021-06-05 14:03:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:48,891 INFO L225 Difference]: With dead ends: 4136 [2021-06-05 14:03:48,891 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 14:03:48,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 14:03:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3990. [2021-06-05 14:03:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-06-05 14:03:48,936 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-06-05 14:03:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:48,936 INFO L482 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-06-05 14:03:48,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) 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 14:03:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-06-05 14:03:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:48,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:48,939 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:49,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14892,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:49,140 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:49,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1743603605, now seen corresponding path program 290 times [2021-06-05 14:03:49,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:49,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681700846] [2021-06-05 14:03:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:49,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:49,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681700846] [2021-06-05 14:03:49,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681700846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:49,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725785337] [2021-06-05 14:03:49,174 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 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 14:03:49,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:49,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725785337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:49,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:49,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:03:49,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384513315] [2021-06-05 14:03:49,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:49,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:49,229 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:49,337 INFO L93 Difference]: Finished difference Result 5817 states and 17279 transitions. [2021-06-05 14:03:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:03:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 20 [2021-06-05 14:03:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:49,342 INFO L225 Difference]: With dead ends: 5817 [2021-06-05 14:03:49,342 INFO L226 Difference]: Without dead ends: 5817 [2021-06-05 14:03:49,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2021-06-05 14:03:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5550. [2021-06-05 14:03:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.0131555235177507) internal successors, (16720), 5549 states have internal predecessors, (16720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16720 transitions. [2021-06-05 14:03:49,434 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16720 transitions. Word has length 20 [2021-06-05 14:03:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:49,434 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 16720 transitions. [2021-06-05 14:03:49,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16720 transitions. [2021-06-05 14:03:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:49,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:49,438 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:49,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15037,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:49,638 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1369131344, now seen corresponding path program 291 times [2021-06-05 14:03:49,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:49,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108812795] [2021-06-05 14:03:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:49,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:49,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108812795] [2021-06-05 14:03:49,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108812795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:49,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300928026] [2021-06-05 14:03:49,723 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 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 14:03:49,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:03:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:49,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:50,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:50,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:50,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:50,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:50,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:50,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:50,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300928026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:50,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:50,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:50,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492440820] [2021-06-05 14:03:50,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:50,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:50,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:50,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:50,361 INFO L87 Difference]: Start difference. First operand 5550 states and 16720 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:50,767 INFO L93 Difference]: Finished difference Result 5762 states and 17201 transitions. [2021-06-05 14:03:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:03:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:50,773 INFO L225 Difference]: With dead ends: 5762 [2021-06-05 14:03:50,773 INFO L226 Difference]: Without dead ends: 5747 [2021-06-05 14:03:50,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:03:50,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-06-05 14:03:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5546. [2021-06-05 14:03:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5545 states have (on average 3.012082957619477) internal successors, (16702), 5545 states have internal predecessors, (16702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 16702 transitions. [2021-06-05 14:03:50,834 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 16702 transitions. Word has length 20 [2021-06-05 14:03:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:50,834 INFO L482 AbstractCegarLoop]: Abstraction has 5546 states and 16702 transitions. [2021-06-05 14:03:50,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 16702 transitions. [2021-06-05 14:03:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:50,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:50,838 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:51,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15038 [2021-06-05 14:03:51,039 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:51,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:51,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2045017425, now seen corresponding path program 292 times [2021-06-05 14:03:51,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:51,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745573230] [2021-06-05 14:03:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:51,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745573230] [2021-06-05 14:03:51,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745573230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906665813] [2021-06-05 14:03:51,078 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 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 14:03:51,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:51,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:51,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906665813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:51,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:03:51,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057821763] [2021-06-05 14:03:51,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:03:51,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:03:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:51,132 INFO L87 Difference]: Start difference. First operand 5546 states and 16702 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:03:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:51,233 INFO L93 Difference]: Finished difference Result 5777 states and 17109 transitions. [2021-06-05 14:03:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:03:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-05 14:03:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:51,238 INFO L225 Difference]: With dead ends: 5777 [2021-06-05 14:03:51,238 INFO L226 Difference]: Without dead ends: 5777 [2021-06-05 14:03:51,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:03:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-06-05 14:03:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5282. [2021-06-05 14:03:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-06-05 14:03:51,300 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-06-05 14:03:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:51,300 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-06-05 14:03:51,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:03:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-06-05 14:03:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:51,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:51,304 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:51,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15118 [2021-06-05 14:03:51,504 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1812030484, now seen corresponding path program 293 times [2021-06-05 14:03:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:51,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631156122] [2021-06-05 14:03:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:51,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631156122] [2021-06-05 14:03:51,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631156122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873873506] [2021-06-05 14:03:51,578 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 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 14:03:51,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:03:51,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:51,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:52,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:52,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:52,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:52,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873873506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:52,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:52,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:52,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102275001] [2021-06-05 14:03:52,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:52,291 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:52,628 INFO L93 Difference]: Finished difference Result 5451 states and 16210 transitions. [2021-06-05 14:03:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:03:52,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 20 [2021-06-05 14:03:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:52,633 INFO L225 Difference]: With dead ends: 5451 [2021-06-05 14:03:52,633 INFO L226 Difference]: Without dead ends: 5446 [2021-06-05 14:03:52,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-06-05 14:03:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5282. [2021-06-05 14:03:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-06-05 14:03:52,690 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-06-05 14:03:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:52,690 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-06-05 14:03:52,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) 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 14:03:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-06-05 14:03:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:52,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:52,693 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:52,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15119 [2021-06-05 14:03:52,894 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash -766814933, now seen corresponding path program 294 times [2021-06-05 14:03:52,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:52,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053155982] [2021-06-05 14:03:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:52,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053155982] [2021-06-05 14:03:52,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053155982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276938805] [2021-06-05 14:03:52,935 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 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 14:03:52,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:52,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276938805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:52,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:52,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:03:52,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377132059] [2021-06-05 14:03:52,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:03:52,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:52,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:03:52,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:52,990 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:03:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:53,073 INFO L93 Difference]: Finished difference Result 5596 states and 16637 transitions. [2021-06-05 14:03:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:03:53,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 20 [2021-06-05 14:03:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:53,078 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 14:03:53,078 INFO L226 Difference]: Without dead ends: 5596 [2021-06-05 14:03:53,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-06-05 14:03:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5450. [2021-06-05 14:03:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.998715360616627) internal successors, (16340), 5449 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16340 transitions. [2021-06-05 14:03:53,139 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16340 transitions. Word has length 20 [2021-06-05 14:03:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:53,139 INFO L482 AbstractCegarLoop]: Abstraction has 5450 states and 16340 transitions. [2021-06-05 14:03:53,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:03:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16340 transitions. [2021-06-05 14:03:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:53,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:53,143 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:53,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15221,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:53,343 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1637965360, now seen corresponding path program 295 times [2021-06-05 14:03:53,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:53,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776881994] [2021-06-05 14:03:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:53,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776881994] [2021-06-05 14:03:53,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776881994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:53,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391705381] [2021-06-05 14:03:53,434 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 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 14:03:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:53,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:53,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:54,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:54,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:54,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:54,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391705381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:54,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875631264] [2021-06-05 14:03:54,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:54,204 INFO L87 Difference]: Start difference. First operand 5450 states and 16340 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:54,612 INFO L93 Difference]: Finished difference Result 5569 states and 16513 transitions. [2021-06-05 14:03:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:03:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:54,618 INFO L225 Difference]: With dead ends: 5569 [2021-06-05 14:03:54,618 INFO L226 Difference]: Without dead ends: 5550 [2021-06-05 14:03:54,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-06-05 14:03:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5450. [2021-06-05 14:03:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.9981648008808954) internal successors, (16337), 5449 states have internal predecessors, (16337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16337 transitions. [2021-06-05 14:03:54,678 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16337 transitions. Word has length 20 [2021-06-05 14:03:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:54,678 INFO L482 AbstractCegarLoop]: Abstraction has 5450 states and 16337 transitions. [2021-06-05 14:03:54,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16337 transitions. [2021-06-05 14:03:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:54,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:54,681 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:54,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15222 [2021-06-05 14:03:54,882 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2034272111, now seen corresponding path program 296 times [2021-06-05 14:03:54,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:54,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369874228] [2021-06-05 14:03:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:54,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369874228] [2021-06-05 14:03:54,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369874228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492509117] [2021-06-05 14:03:54,929 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 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 14:03:54,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:54,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492509117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:54,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:03:54,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376289071] [2021-06-05 14:03:54,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:03:54,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:03:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:03:54,983 INFO L87 Difference]: Start difference. First operand 5450 states and 16337 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:03:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:55,110 INFO L93 Difference]: Finished difference Result 5644 states and 16739 transitions. [2021-06-05 14:03:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:03:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-05 14:03:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:55,115 INFO L225 Difference]: With dead ends: 5644 [2021-06-05 14:03:55,115 INFO L226 Difference]: Without dead ends: 5644 [2021-06-05 14:03:55,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-06-05 14:03:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5491. [2021-06-05 14:03:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5490 states have (on average 2.9981785063752278) internal successors, (16460), 5490 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 16460 transitions. [2021-06-05 14:03:55,178 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 16460 transitions. Word has length 20 [2021-06-05 14:03:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:55,178 INFO L482 AbstractCegarLoop]: Abstraction has 5491 states and 16460 transitions. [2021-06-05 14:03:55,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:03:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 16460 transitions. [2021-06-05 14:03:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:55,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:55,182 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:55,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15320,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:55,383 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1213654124, now seen corresponding path program 297 times [2021-06-05 14:03:55,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:55,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366906034] [2021-06-05 14:03:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:55,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:55,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366906034] [2021-06-05 14:03:55,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366906034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:55,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446034695] [2021-06-05 14:03:55,466 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 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 14:03:55,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:55,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:03:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:55,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:55,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:56,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:56,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:56,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:56,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446034695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:56,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:56,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901632019] [2021-06-05 14:03:56,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:56,384 INFO L87 Difference]: Start difference. First operand 5491 states and 16460 transitions. Second operand has 25 states, 25 states have (on average 1.36) 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 14:03:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:56,817 INFO L93 Difference]: Finished difference Result 7043 states and 21060 transitions. [2021-06-05 14:03:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:56,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) 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 20 [2021-06-05 14:03:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:56,823 INFO L225 Difference]: With dead ends: 7043 [2021-06-05 14:03:56,823 INFO L226 Difference]: Without dead ends: 7038 [2021-06-05 14:03:56,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:03:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-06-05 14:03:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5493. [2021-06-05 14:03:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.997632920611799) internal successors, (16463), 5492 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 16463 transitions. [2021-06-05 14:03:56,894 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 16463 transitions. Word has length 20 [2021-06-05 14:03:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:56,894 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 16463 transitions. [2021-06-05 14:03:56,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) 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 14:03:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 16463 transitions. [2021-06-05 14:03:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:03:56,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:56,897 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:57,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15321,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:57,098 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:57,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1624228331, now seen corresponding path program 298 times [2021-06-05 14:03:57,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:57,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757167816] [2021-06-05 14:03:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:57,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757167816] [2021-06-05 14:03:57,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757167816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632237648] [2021-06-05 14:03:57,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:57,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:57,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:03:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632237648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:57,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:03:57,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745731853] [2021-06-05 14:03:57,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:03:57,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:57,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:03:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:03:57,205 INFO L87 Difference]: Start difference. First operand 5493 states and 16463 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:03:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:57,384 INFO L93 Difference]: Finished difference Result 5812 states and 17186 transitions. [2021-06-05 14:03:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:03:57,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-06-05 14:03:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:57,389 INFO L225 Difference]: With dead ends: 5812 [2021-06-05 14:03:57,389 INFO L226 Difference]: Without dead ends: 5812 [2021-06-05 14:03:57,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-06-05 14:03:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5528. [2021-06-05 14:03:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5528 states, 5527 states have (on average 2.99764791025873) internal successors, (16568), 5527 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 16568 transitions. [2021-06-05 14:03:57,450 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 16568 transitions. Word has length 20 [2021-06-05 14:03:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:57,450 INFO L482 AbstractCegarLoop]: Abstraction has 5528 states and 16568 transitions. [2021-06-05 14:03:57,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:03:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 16568 transitions. [2021-06-05 14:03:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:57,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:57,454 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:57,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15473,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:57,662 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:57,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1322257352, now seen corresponding path program 299 times [2021-06-05 14:03:57,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:57,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879867184] [2021-06-05 14:03:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:57,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879867184] [2021-06-05 14:03:57,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879867184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237926385] [2021-06-05 14:03:57,722 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 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 14:03:57,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:03:57,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:03:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:57,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237926385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:57,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:57,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:03:57,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456207858] [2021-06-05 14:03:57,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:03:57,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:57,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:03:57,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:03:57,781 INFO L87 Difference]: Start difference. First operand 5528 states and 16568 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:03:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:57,907 INFO L93 Difference]: Finished difference Result 5709 states and 16848 transitions. [2021-06-05 14:03:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:03:57,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:03:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:57,912 INFO L225 Difference]: With dead ends: 5709 [2021-06-05 14:03:57,912 INFO L226 Difference]: Without dead ends: 5703 [2021-06-05 14:03:57,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-06-05 14:03:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5519. [2021-06-05 14:03:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.996737948532077) internal successors, (16536), 5518 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 16536 transitions. [2021-06-05 14:03:57,975 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 16536 transitions. Word has length 21 [2021-06-05 14:03:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:57,975 INFO L482 AbstractCegarLoop]: Abstraction has 5519 states and 16536 transitions. [2021-06-05 14:03:57,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:03:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 16536 transitions. [2021-06-05 14:03:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:57,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:57,979 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:58,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15474,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:58,179 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:58,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1554817325, now seen corresponding path program 300 times [2021-06-05 14:03:58,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:58,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474201799] [2021-06-05 14:03:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:58,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474201799] [2021-06-05 14:03:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474201799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166913245] [2021-06-05 14:03:58,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:58,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:03:58,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:03:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166913245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:58,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:03:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216353203] [2021-06-05 14:03:58,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:03:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:03:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:03:58,289 INFO L87 Difference]: Start difference. First operand 5519 states and 16536 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:03:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:58,466 INFO L93 Difference]: Finished difference Result 5835 states and 17177 transitions. [2021-06-05 14:03:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:58,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:03:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:58,471 INFO L225 Difference]: With dead ends: 5835 [2021-06-05 14:03:58,471 INFO L226 Difference]: Without dead ends: 5826 [2021-06-05 14:03:58,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-05 14:03:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5556. [2021-06-05 14:03:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.996759675967597) internal successors, (16647), 5555 states have internal predecessors, (16647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16647 transitions. [2021-06-05 14:03:58,554 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16647 transitions. Word has length 21 [2021-06-05 14:03:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:58,554 INFO L482 AbstractCegarLoop]: Abstraction has 5556 states and 16647 transitions. [2021-06-05 14:03:58,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:03:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16647 transitions. [2021-06-05 14:03:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:58,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:58,558 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:58,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15475 [2021-06-05 14:03:58,758 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash -395399322, now seen corresponding path program 301 times [2021-06-05 14:03:58,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:58,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138628834] [2021-06-05 14:03:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:58,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138628834] [2021-06-05 14:03:58,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138628834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077894258] [2021-06-05 14:03:58,798 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 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 14:03:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:03:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077894258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:58,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:03:58,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874048473] [2021-06-05 14:03:58,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:58,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:58,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:58,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:58,855 INFO L87 Difference]: Start difference. First operand 5556 states and 16647 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:58,971 INFO L93 Difference]: Finished difference Result 5621 states and 16745 transitions. [2021-06-05 14:03:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:03:58,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:03:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:58,976 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 14:03:58,976 INFO L226 Difference]: Without dead ends: 5617 [2021-06-05 14:03:58,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:03:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-06-05 14:03:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5556. [2021-06-05 14:03:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.9962196219621964) internal successors, (16644), 5555 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16644 transitions. [2021-06-05 14:03:59,038 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16644 transitions. Word has length 21 [2021-06-05 14:03:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:59,038 INFO L482 AbstractCegarLoop]: Abstraction has 5556 states and 16644 transitions. [2021-06-05 14:03:59,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16644 transitions. [2021-06-05 14:03:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:59,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:59,042 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:59,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15476,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:59,243 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2031423451, now seen corresponding path program 302 times [2021-06-05 14:03:59,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:59,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21852733] [2021-06-05 14:03:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:59,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21852733] [2021-06-05 14:03:59,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21852733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554976668] [2021-06-05 14:03:59,283 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 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 14:03:59,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:03:59,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554976668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:59,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:03:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328075449] [2021-06-05 14:03:59,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:59,338 INFO L87 Difference]: Start difference. First operand 5556 states and 16644 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:59,400 INFO L93 Difference]: Finished difference Result 5973 states and 17563 transitions. [2021-06-05 14:03:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:03:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:03:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:59,406 INFO L225 Difference]: With dead ends: 5973 [2021-06-05 14:03:59,406 INFO L226 Difference]: Without dead ends: 5973 [2021-06-05 14:03:59,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:03:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-06-05 14:03:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5549. [2021-06-05 14:03:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994953136265321) internal successors, (16616), 5548 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16616 transitions. [2021-06-05 14:03:59,469 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16616 transitions. Word has length 21 [2021-06-05 14:03:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:59,469 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 16616 transitions. [2021-06-05 14:03:59,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16616 transitions. [2021-06-05 14:03:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:59,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:59,473 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:59,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15477,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:59,673 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash -771235884, now seen corresponding path program 303 times [2021-06-05 14:03:59,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:59,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660631823] [2021-06-05 14:03:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:59,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660631823] [2021-06-05 14:03:59,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660631823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29867520] [2021-06-05 14:03:59,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:03:59,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:03:59,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:03:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29867520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:59,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:03:59,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825441816] [2021-06-05 14:03:59,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:59,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:59,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:59,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:59,764 INFO L87 Difference]: Start difference. First operand 5549 states and 16616 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:59,875 INFO L93 Difference]: Finished difference Result 5638 states and 16779 transitions. [2021-06-05 14:03:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:03:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:03:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:59,880 INFO L225 Difference]: With dead ends: 5638 [2021-06-05 14:03:59,880 INFO L226 Difference]: Without dead ends: 5634 [2021-06-05 14:03:59,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:03:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-06-05 14:03:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5549. [2021-06-05 14:03:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-06-05 14:03:59,940 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-06-05 14:03:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:59,940 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-06-05 14:03:59,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:03:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-06-05 14:03:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:03:59,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:59,944 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:00,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15478 [2021-06-05 14:04:00,144 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:00,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1662557515, now seen corresponding path program 304 times [2021-06-05 14:04:00,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:00,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452144254] [2021-06-05 14:04:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:00,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452144254] [2021-06-05 14:04:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452144254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452173753] [2021-06-05 14:04:00,184 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 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 14:04:00,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:00,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:00,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452173753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:00,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:00,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:00,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550329231] [2021-06-05 14:04:00,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:00,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:00,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:00,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:00,237 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:00,311 INFO L93 Difference]: Finished difference Result 6298 states and 18497 transitions. [2021-06-05 14:04:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:00,317 INFO L225 Difference]: With dead ends: 6298 [2021-06-05 14:04:00,317 INFO L226 Difference]: Without dead ends: 6298 [2021-06-05 14:04:00,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2021-06-05 14:04:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 5549. [2021-06-05 14:04:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-06-05 14:04:00,384 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-06-05 14:04:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:00,384 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-06-05 14:04:00,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-06-05 14:04:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:00,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:00,388 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:00,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15479 [2021-06-05 14:04:00,588 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1771892424, now seen corresponding path program 305 times [2021-06-05 14:04:00,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:00,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47729161] [2021-06-05 14:04:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:00,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:00,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47729161] [2021-06-05 14:04:00,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47729161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:00,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874619970] [2021-06-05 14:04:00,627 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 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 14:04:00,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:00,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:00,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874619970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:00,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:00,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:00,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841411261] [2021-06-05 14:04:00,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:00,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:00,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:00,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:00,681 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 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 14:04:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:00,757 INFO L93 Difference]: Finished difference Result 5861 states and 17231 transitions. [2021-06-05 14:04:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:00,758 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 21 [2021-06-05 14:04:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:00,762 INFO L225 Difference]: With dead ends: 5861 [2021-06-05 14:04:00,762 INFO L226 Difference]: Without dead ends: 5859 [2021-06-05 14:04:00,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-06-05 14:04:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5592. [2021-06-05 14:04:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 5591 states have (on average 2.996959399034162) internal successors, (16756), 5591 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 16756 transitions. [2021-06-05 14:04:00,827 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 16756 transitions. Word has length 21 [2021-06-05 14:04:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:00,827 INFO L482 AbstractCegarLoop]: Abstraction has 5592 states and 16756 transitions. [2021-06-05 14:04:00,827 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 14:04:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 16756 transitions. [2021-06-05 14:04:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:00,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:00,831 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:01,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15480 [2021-06-05 14:04:01,031 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:01,032 INFO L82 PathProgramCache]: Analyzing trace with hash 994742825, now seen corresponding path program 306 times [2021-06-05 14:04:01,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:01,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407930901] [2021-06-05 14:04:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:01,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:01,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407930901] [2021-06-05 14:04:01,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407930901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356948782] [2021-06-05 14:04:01,064 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 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 14:04:01,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:01,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:01,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:01,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:01,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356948782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:01,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596517216] [2021-06-05 14:04:01,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:01,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:01,113 INFO L87 Difference]: Start difference. First operand 5592 states and 16756 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 14:04:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:01,221 INFO L93 Difference]: Finished difference Result 5825 states and 17153 transitions. [2021-06-05 14:04:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:01,221 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 21 [2021-06-05 14:04:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:01,226 INFO L225 Difference]: With dead ends: 5825 [2021-06-05 14:04:01,226 INFO L226 Difference]: Without dead ends: 5823 [2021-06-05 14:04:01,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2021-06-05 14:04:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5602. [2021-06-05 14:04:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 2.997143367255847) internal successors, (16787), 5601 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 16787 transitions. [2021-06-05 14:04:01,293 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 16787 transitions. Word has length 21 [2021-06-05 14:04:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:01,293 INFO L482 AbstractCegarLoop]: Abstraction has 5602 states and 16787 transitions. [2021-06-05 14:04:01,293 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 14:04:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 16787 transitions. [2021-06-05 14:04:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:01,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:01,297 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:01,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15481,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:01,498 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1535817962, now seen corresponding path program 307 times [2021-06-05 14:04:01,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:01,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797000470] [2021-06-05 14:04:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:01,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:01,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797000470] [2021-06-05 14:04:01,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797000470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801863788] [2021-06-05 14:04:01,537 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 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 14:04:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:01,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:01,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801863788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:01,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728608407] [2021-06-05 14:04:01,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:01,587 INFO L87 Difference]: Start difference. First operand 5602 states and 16787 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:01,700 INFO L93 Difference]: Finished difference Result 5786 states and 17096 transitions. [2021-06-05 14:04:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:01,705 INFO L225 Difference]: With dead ends: 5786 [2021-06-05 14:04:01,705 INFO L226 Difference]: Without dead ends: 5778 [2021-06-05 14:04:01,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-06-05 14:04:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 5570. [2021-06-05 14:04:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 2.995151732806608) internal successors, (16680), 5569 states have internal predecessors, (16680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 16680 transitions. [2021-06-05 14:04:01,769 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16680 transitions. Word has length 21 [2021-06-05 14:04:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:01,769 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 16680 transitions. [2021-06-05 14:04:01,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16680 transitions. [2021-06-05 14:04:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:01,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:01,773 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:01,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15482 [2021-06-05 14:04:01,974 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash 644496331, now seen corresponding path program 308 times [2021-06-05 14:04:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:01,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82044287] [2021-06-05 14:04:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82044287] [2021-06-05 14:04:02,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82044287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399668899] [2021-06-05 14:04:02,011 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 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 14:04:02,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399668899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:02,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:02,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31055864] [2021-06-05 14:04:02,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:02,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:02,073 INFO L87 Difference]: Start difference. First operand 5570 states and 16680 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:02,145 INFO L93 Difference]: Finished difference Result 6267 states and 18410 transitions. [2021-06-05 14:04:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:02,150 INFO L225 Difference]: With dead ends: 6267 [2021-06-05 14:04:02,150 INFO L226 Difference]: Without dead ends: 6267 [2021-06-05 14:04:02,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-06-05 14:04:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5560. [2021-06-05 14:04:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.99388379204893) internal successors, (16643), 5559 states have internal predecessors, (16643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16643 transitions. [2021-06-05 14:04:02,235 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16643 transitions. Word has length 21 [2021-06-05 14:04:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:02,235 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 16643 transitions. [2021-06-05 14:04:02,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16643 transitions. [2021-06-05 14:04:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:02,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:02,239 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:02,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15483,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:02,439 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash 462732582, now seen corresponding path program 309 times [2021-06-05 14:04:02,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:02,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627027077] [2021-06-05 14:04:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627027077] [2021-06-05 14:04:02,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627027077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737640586] [2021-06-05 14:04:02,480 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 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 14:04:02,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:04:02,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:02,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737640586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:02,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:02,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748645101] [2021-06-05 14:04:02,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:02,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:02,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:02,539 INFO L87 Difference]: Start difference. First operand 5560 states and 16643 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:02,655 INFO L93 Difference]: Finished difference Result 5734 states and 16945 transitions. [2021-06-05 14:04:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:02,660 INFO L225 Difference]: With dead ends: 5734 [2021-06-05 14:04:02,660 INFO L226 Difference]: Without dead ends: 5728 [2021-06-05 14:04:02,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2021-06-05 14:04:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 5560. [2021-06-05 14:04:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.993344126641482) internal successors, (16640), 5559 states have internal predecessors, (16640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16640 transitions. [2021-06-05 14:04:02,723 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16640 transitions. Word has length 21 [2021-06-05 14:04:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:02,723 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 16640 transitions. [2021-06-05 14:04:02,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16640 transitions. [2021-06-05 14:04:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:02,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:02,727 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:02,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15484 [2021-06-05 14:04:02,927 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1182351909, now seen corresponding path program 310 times [2021-06-05 14:04:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:02,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405128842] [2021-06-05 14:04:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:02,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405128842] [2021-06-05 14:04:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405128842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260360396] [2021-06-05 14:04:02,966 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 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 14:04:02,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260360396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:03,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:03,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479967177] [2021-06-05 14:04:03,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:03,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:03,023 INFO L87 Difference]: Start difference. First operand 5560 states and 16640 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:03,124 INFO L93 Difference]: Finished difference Result 6745 states and 19766 transitions. [2021-06-05 14:04:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:03,130 INFO L225 Difference]: With dead ends: 6745 [2021-06-05 14:04:03,130 INFO L226 Difference]: Without dead ends: 6745 [2021-06-05 14:04:03,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-06-05 14:04:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 5531. [2021-06-05 14:04:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 5530 states have (on average 2.992405063291139) internal successors, (16548), 5530 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 16548 transitions. [2021-06-05 14:04:03,203 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 16548 transitions. Word has length 21 [2021-06-05 14:04:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:03,204 INFO L482 AbstractCegarLoop]: Abstraction has 5531 states and 16548 transitions. [2021-06-05 14:04:03,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 16548 transitions. [2021-06-05 14:04:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:03,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:03,207 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:03,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15485,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:03,408 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:03,408 INFO L82 PathProgramCache]: Analyzing trace with hash 276117618, now seen corresponding path program 311 times [2021-06-05 14:04:03,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:03,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909413164] [2021-06-05 14:04:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:03,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909413164] [2021-06-05 14:04:03,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909413164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314782949] [2021-06-05 14:04:03,442 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 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 14:04:03,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:03,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:03,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:03,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314782949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:03,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:03,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363865028] [2021-06-05 14:04:03,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:03,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:03,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:03,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:03,498 INFO L87 Difference]: Start difference. First operand 5531 states and 16548 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 14:04:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:03,568 INFO L93 Difference]: Finished difference Result 5788 states and 17031 transitions. [2021-06-05 14:04:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:03,568 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 21 [2021-06-05 14:04:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:03,573 INFO L225 Difference]: With dead ends: 5788 [2021-06-05 14:04:03,573 INFO L226 Difference]: Without dead ends: 5786 [2021-06-05 14:04:03,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-05 14:04:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5550. [2021-06-05 14:04:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 2.9938727698684446) internal successors, (16613), 5549 states have internal predecessors, (16613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16613 transitions. [2021-06-05 14:04:03,636 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16613 transitions. Word has length 21 [2021-06-05 14:04:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:03,637 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 16613 transitions. [2021-06-05 14:04:03,637 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 14:04:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16613 transitions. [2021-06-05 14:04:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:03,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:03,640 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:03,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15486,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:03,841 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash -501031981, now seen corresponding path program 312 times [2021-06-05 14:04:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:03,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899558388] [2021-06-05 14:04:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:03,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:03,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899558388] [2021-06-05 14:04:03,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899558388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071751747] [2021-06-05 14:04:03,872 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 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 14:04:03,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:03,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071751747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:03,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:03,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:03,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190458036] [2021-06-05 14:04:03,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:03,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:03,922 INFO L87 Difference]: Start difference. First operand 5550 states and 16613 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 14:04:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:04,021 INFO L93 Difference]: Finished difference Result 5761 states and 16965 transitions. [2021-06-05 14:04:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:04,021 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 21 [2021-06-05 14:04:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:04,026 INFO L225 Difference]: With dead ends: 5761 [2021-06-05 14:04:04,026 INFO L226 Difference]: Without dead ends: 5759 [2021-06-05 14:04:04,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-06-05 14:04:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5562. [2021-06-05 14:04:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.994425463046215) internal successors, (16652), 5561 states have internal predecessors, (16652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16652 transitions. [2021-06-05 14:04:04,088 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16652 transitions. Word has length 21 [2021-06-05 14:04:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:04,088 INFO L482 AbstractCegarLoop]: Abstraction has 5562 states and 16652 transitions. [2021-06-05 14:04:04,088 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 14:04:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16652 transitions. [2021-06-05 14:04:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:04,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:04,092 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:04,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15487,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:04,292 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1033042224, now seen corresponding path program 313 times [2021-06-05 14:04:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:04,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821733579] [2021-06-05 14:04:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821733579] [2021-06-05 14:04:04,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821733579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463149994] [2021-06-05 14:04:04,336 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 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 14:04:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463149994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:04,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:04,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759262831] [2021-06-05 14:04:04,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:04,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:04,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:04,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:04,384 INFO L87 Difference]: Start difference. First operand 5562 states and 16652 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:04,514 INFO L93 Difference]: Finished difference Result 5736 states and 16954 transitions. [2021-06-05 14:04:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:04,520 INFO L225 Difference]: With dead ends: 5736 [2021-06-05 14:04:04,520 INFO L226 Difference]: Without dead ends: 5730 [2021-06-05 14:04:04,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-06-05 14:04:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5534. [2021-06-05 14:04:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.9942165190674137) internal successors, (16567), 5533 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 16567 transitions. [2021-06-05 14:04:04,587 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 16567 transitions. Word has length 21 [2021-06-05 14:04:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:04,587 INFO L482 AbstractCegarLoop]: Abstraction has 5534 states and 16567 transitions. [2021-06-05 14:04:04,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 16567 transitions. [2021-06-05 14:04:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:04,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:04,591 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:04,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15488,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:04,791 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash -313422897, now seen corresponding path program 314 times [2021-06-05 14:04:04,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:04,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584528593] [2021-06-05 14:04:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584528593] [2021-06-05 14:04:04,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584528593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752409204] [2021-06-05 14:04:04,837 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 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 14:04:04,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:04,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:04,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:04,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752409204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:04,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:04,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129145513] [2021-06-05 14:04:04,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:04,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:04,888 INFO L87 Difference]: Start difference. First operand 5534 states and 16567 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:04,973 INFO L93 Difference]: Finished difference Result 6490 states and 19040 transitions. [2021-06-05 14:04:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:04,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:04,979 INFO L225 Difference]: With dead ends: 6490 [2021-06-05 14:04:04,979 INFO L226 Difference]: Without dead ends: 6490 [2021-06-05 14:04:04,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-06-05 14:04:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5526. [2021-06-05 14:04:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 2.9931221719457013) internal successors, (16537), 5525 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 16537 transitions. [2021-06-05 14:04:05,049 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 16537 transitions. Word has length 21 [2021-06-05 14:04:05,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:05,049 INFO L482 AbstractCegarLoop]: Abstraction has 5526 states and 16537 transitions. [2021-06-05 14:04:05,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 16537 transitions. [2021-06-05 14:04:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:05,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:05,052 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:05,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15489 [2021-06-05 14:04:05,253 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash 61049364, now seen corresponding path program 315 times [2021-06-05 14:04:05,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:05,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757353940] [2021-06-05 14:04:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:05,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:05,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757353940] [2021-06-05 14:04:05,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757353940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:05,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160329455] [2021-06-05 14:04:05,299 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 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 14:04:05,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:04:05,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:05,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:05,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160329455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:05,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:05,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:05,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166326641] [2021-06-05 14:04:05,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:05,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:05,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:05,350 INFO L87 Difference]: Start difference. First operand 5526 states and 16537 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:05,451 INFO L93 Difference]: Finished difference Result 5752 states and 17010 transitions. [2021-06-05 14:04:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:05,458 INFO L225 Difference]: With dead ends: 5752 [2021-06-05 14:04:05,458 INFO L226 Difference]: Without dead ends: 5744 [2021-06-05 14:04:05,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2021-06-05 14:04:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5527. [2021-06-05 14:04:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 2.9927614911328266) internal successors, (16538), 5526 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 16538 transitions. [2021-06-05 14:04:05,523 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 16538 transitions. Word has length 21 [2021-06-05 14:04:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:05,523 INFO L482 AbstractCegarLoop]: Abstraction has 5527 states and 16538 transitions. [2021-06-05 14:04:05,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:05,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 16538 transitions. [2021-06-05 14:04:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:05,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:05,527 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:05,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15490 [2021-06-05 14:04:05,728 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash -819769163, now seen corresponding path program 316 times [2021-06-05 14:04:05,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:05,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742573147] [2021-06-05 14:04:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:05,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:05,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742573147] [2021-06-05 14:04:05,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742573147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:05,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406903665] [2021-06-05 14:04:05,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:05,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:05,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:05,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:05,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406903665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:05,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:05,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:05,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559943837] [2021-06-05 14:04:05,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:05,822 INFO L87 Difference]: Start difference. First operand 5527 states and 16538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:05,939 INFO L93 Difference]: Finished difference Result 7065 states and 20726 transitions. [2021-06-05 14:04:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:05,945 INFO L225 Difference]: With dead ends: 7065 [2021-06-05 14:04:05,945 INFO L226 Difference]: Without dead ends: 7065 [2021-06-05 14:04:05,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-06-05 14:04:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 5559. [2021-06-05 14:04:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.9899244332493704) internal successors, (16618), 5558 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16618 transitions. [2021-06-05 14:04:06,032 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16618 transitions. Word has length 21 [2021-06-05 14:04:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:06,032 INFO L482 AbstractCegarLoop]: Abstraction has 5559 states and 16618 transitions. [2021-06-05 14:04:06,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16618 transitions. [2021-06-05 14:04:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:06,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:06,036 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:06,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15491,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:06,236 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2090839484, now seen corresponding path program 317 times [2021-06-05 14:04:06,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:06,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154240860] [2021-06-05 14:04:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:06,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154240860] [2021-06-05 14:04:06,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154240860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132393854] [2021-06-05 14:04:06,280 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 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 14:04:06,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:06,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:06,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132393854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:06,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:06,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:06,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034730538] [2021-06-05 14:04:06,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:06,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:06,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:06,330 INFO L87 Difference]: Start difference. First operand 5559 states and 16618 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:06,446 INFO L93 Difference]: Finished difference Result 5721 states and 16907 transitions. [2021-06-05 14:04:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:06,451 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 14:04:06,451 INFO L226 Difference]: Without dead ends: 5713 [2021-06-05 14:04:06,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-06-05 14:04:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5559. [2021-06-05 14:04:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.989564591579705) internal successors, (16616), 5558 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16616 transitions. [2021-06-05 14:04:06,514 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16616 transitions. Word has length 21 [2021-06-05 14:04:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:06,514 INFO L482 AbstractCegarLoop]: Abstraction has 5559 states and 16616 transitions. [2021-06-05 14:04:06,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16616 transitions. [2021-06-05 14:04:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:06,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:06,518 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:06,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15492 [2021-06-05 14:04:06,718 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1323309285, now seen corresponding path program 318 times [2021-06-05 14:04:06,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:06,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435465994] [2021-06-05 14:04:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:06,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435465994] [2021-06-05 14:04:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435465994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848683614] [2021-06-05 14:04:06,760 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 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 14:04:06,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:06,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:06,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:06,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848683614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:06,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:06,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:06,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766766964] [2021-06-05 14:04:06,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:06,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:06,818 INFO L87 Difference]: Start difference. First operand 5559 states and 16616 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:06,933 INFO L93 Difference]: Finished difference Result 7043 states and 20681 transitions. [2021-06-05 14:04:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:06,940 INFO L225 Difference]: With dead ends: 7043 [2021-06-05 14:04:06,940 INFO L226 Difference]: Without dead ends: 7043 [2021-06-05 14:04:06,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-06-05 14:04:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 3914. [2021-06-05 14:04:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 2.9608995655507284) internal successors, (11586), 3913 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 11586 transitions. [2021-06-05 14:04:06,999 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 11586 transitions. Word has length 21 [2021-06-05 14:04:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:06,999 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 11586 transitions. [2021-06-05 14:04:06,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 11586 transitions. [2021-06-05 14:04:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:07,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:07,002 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:07,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15493,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:07,202 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1151738888, now seen corresponding path program 319 times [2021-06-05 14:04:07,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:07,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039419057] [2021-06-05 14:04:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:07,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039419057] [2021-06-05 14:04:07,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039419057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80903318] [2021-06-05 14:04:07,234 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 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 14:04:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80903318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:07,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:07,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524797071] [2021-06-05 14:04:07,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:07,290 INFO L87 Difference]: Start difference. First operand 3914 states and 11586 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 14:04:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:07,344 INFO L93 Difference]: Finished difference Result 4174 states and 12068 transitions. [2021-06-05 14:04:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:07,344 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 21 [2021-06-05 14:04:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:07,347 INFO L225 Difference]: With dead ends: 4174 [2021-06-05 14:04:07,348 INFO L226 Difference]: Without dead ends: 4172 [2021-06-05 14:04:07,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-06-05 14:04:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3916. [2021-06-05 14:04:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.9591315453384417) internal successors, (11585), 3915 states have internal predecessors, (11585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 11585 transitions. [2021-06-05 14:04:07,391 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 11585 transitions. Word has length 21 [2021-06-05 14:04:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:07,391 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 11585 transitions. [2021-06-05 14:04:07,391 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 14:04:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 11585 transitions. [2021-06-05 14:04:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:07,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:07,394 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:07,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15494 [2021-06-05 14:04:07,595 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash 374589289, now seen corresponding path program 320 times [2021-06-05 14:04:07,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:07,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116743709] [2021-06-05 14:04:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:07,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:07,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116743709] [2021-06-05 14:04:07,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116743709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599170168] [2021-06-05 14:04:07,643 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 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 14:04:07,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:07,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599170168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:07,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:07,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881558980] [2021-06-05 14:04:07,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:07,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:07,694 INFO L87 Difference]: Start difference. First operand 3916 states and 11585 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 14:04:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:07,791 INFO L93 Difference]: Finished difference Result 4111 states and 11901 transitions. [2021-06-05 14:04:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:07,791 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 21 [2021-06-05 14:04:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:07,795 INFO L225 Difference]: With dead ends: 4111 [2021-06-05 14:04:07,795 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 14:04:07,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 14:04:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3926. [2021-06-05 14:04:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 2.959235668789809) internal successors, (11615), 3925 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 11615 transitions. [2021-06-05 14:04:07,835 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 11615 transitions. Word has length 21 [2021-06-05 14:04:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:07,835 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 11615 transitions. [2021-06-05 14:04:07,835 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 14:04:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 11615 transitions. [2021-06-05 14:04:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:07,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:07,838 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:08,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15495,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:08,038 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:08,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:08,038 INFO L82 PathProgramCache]: Analyzing trace with hash 915664426, now seen corresponding path program 321 times [2021-06-05 14:04:08,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:08,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262770234] [2021-06-05 14:04:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262770234] [2021-06-05 14:04:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262770234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742731989] [2021-06-05 14:04:08,075 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 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 14:04:08,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:04:08,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742731989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833478948] [2021-06-05 14:04:08,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:08,126 INFO L87 Difference]: Start difference. First operand 3926 states and 11615 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:08,240 INFO L93 Difference]: Finished difference Result 4151 states and 11987 transitions. [2021-06-05 14:04:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:08,244 INFO L225 Difference]: With dead ends: 4151 [2021-06-05 14:04:08,244 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 14:04:08,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 14:04:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3894. [2021-06-05 14:04:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 2.959671204726432) internal successors, (11522), 3893 states have internal predecessors, (11522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 11522 transitions. [2021-06-05 14:04:08,287 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 11522 transitions. Word has length 21 [2021-06-05 14:04:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:08,287 INFO L482 AbstractCegarLoop]: Abstraction has 3894 states and 11522 transitions. [2021-06-05 14:04:08,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 11522 transitions. [2021-06-05 14:04:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:08,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:08,290 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:08,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15496 [2021-06-05 14:04:08,490 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:08,490 INFO L82 PathProgramCache]: Analyzing trace with hash 24342795, now seen corresponding path program 322 times [2021-06-05 14:04:08,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:08,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791063260] [2021-06-05 14:04:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:08,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791063260] [2021-06-05 14:04:08,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791063260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074312412] [2021-06-05 14:04:08,525 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 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 14:04:08,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074312412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:08,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:08,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998602010] [2021-06-05 14:04:08,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:08,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:08,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:08,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:08,583 INFO L87 Difference]: Start difference. First operand 3894 states and 11522 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:08,653 INFO L93 Difference]: Finished difference Result 4318 states and 12449 transitions. [2021-06-05 14:04:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:08,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:08,657 INFO L225 Difference]: With dead ends: 4318 [2021-06-05 14:04:08,657 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 14:04:08,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 14:04:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3872. [2021-06-05 14:04:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9571170240247997) internal successors, (11447), 3871 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11447 transitions. [2021-06-05 14:04:08,699 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11447 transitions. Word has length 21 [2021-06-05 14:04:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:08,699 INFO L482 AbstractCegarLoop]: Abstraction has 3872 states and 11447 transitions. [2021-06-05 14:04:08,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11447 transitions. [2021-06-05 14:04:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:08,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:08,702 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:08,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15497,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:08,902 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash 936670634, now seen corresponding path program 323 times [2021-06-05 14:04:08,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:08,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904115337] [2021-06-05 14:04:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904115337] [2021-06-05 14:04:08,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904115337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747671326] [2021-06-05 14:04:08,946 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 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 14:04:08,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:08,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:08,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747671326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:09,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:09,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153584366] [2021-06-05 14:04:09,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:09,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:09,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:09,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:09,003 INFO L87 Difference]: Start difference. First operand 3872 states and 11447 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:09,127 INFO L93 Difference]: Finished difference Result 4056 states and 11770 transitions. [2021-06-05 14:04:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:09,130 INFO L225 Difference]: With dead ends: 4056 [2021-06-05 14:04:09,130 INFO L226 Difference]: Without dead ends: 4048 [2021-06-05 14:04:09,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-06-05 14:04:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3878. [2021-06-05 14:04:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.9551199380964666) internal successors, (11457), 3877 states have internal predecessors, (11457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 11457 transitions. [2021-06-05 14:04:09,172 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 11457 transitions. Word has length 21 [2021-06-05 14:04:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:09,172 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 11457 transitions. [2021-06-05 14:04:09,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 11457 transitions. [2021-06-05 14:04:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:09,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:09,175 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:09,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15498,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:09,375 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash 55852107, now seen corresponding path program 324 times [2021-06-05 14:04:09,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:09,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48437844] [2021-06-05 14:04:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:09,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48437844] [2021-06-05 14:04:09,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48437844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200684503] [2021-06-05 14:04:09,418 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 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 14:04:09,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:09,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:09,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200684503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:09,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:09,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145935429] [2021-06-05 14:04:09,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:09,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:09,477 INFO L87 Difference]: Start difference. First operand 3878 states and 11457 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:09,572 INFO L93 Difference]: Finished difference Result 4744 states and 13653 transitions. [2021-06-05 14:04:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:09,576 INFO L225 Difference]: With dead ends: 4744 [2021-06-05 14:04:09,576 INFO L226 Difference]: Without dead ends: 4744 [2021-06-05 14:04:09,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-06-05 14:04:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2823. [2021-06-05 14:04:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 2.919206236711552) internal successors, (8238), 2822 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8238 transitions. [2021-06-05 14:04:09,613 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8238 transitions. Word has length 21 [2021-06-05 14:04:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:09,613 INFO L482 AbstractCegarLoop]: Abstraction has 2823 states and 8238 transitions. [2021-06-05 14:04:09,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8238 transitions. [2021-06-05 14:04:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:09,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:09,615 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:09,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15499,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:09,815 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash 493771494, now seen corresponding path program 325 times [2021-06-05 14:04:09,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:09,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153071489] [2021-06-05 14:04:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:09,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153071489] [2021-06-05 14:04:09,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153071489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726471091] [2021-06-05 14:04:09,862 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 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 14:04:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:09,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:09,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:09,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726471091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:09,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:09,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:09,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609543477] [2021-06-05 14:04:09,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:09,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:09,915 INFO L87 Difference]: Start difference. First operand 2823 states and 8238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:10,020 INFO L93 Difference]: Finished difference Result 3224 states and 9127 transitions. [2021-06-05 14:04:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:04:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:10,023 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 14:04:10,023 INFO L226 Difference]: Without dead ends: 3214 [2021-06-05 14:04:10,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-05 14:04:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2839. [2021-06-05 14:04:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.9147286821705425) internal successors, (8272), 2838 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8272 transitions. [2021-06-05 14:04:10,062 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8272 transitions. Word has length 21 [2021-06-05 14:04:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:10,062 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 8272 transitions. [2021-06-05 14:04:10,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8272 transitions. [2021-06-05 14:04:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:10,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:10,064 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:10,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15500 [2021-06-05 14:04:10,264 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1538987045, now seen corresponding path program 326 times [2021-06-05 14:04:10,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:10,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385249625] [2021-06-05 14:04:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:10,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385249625] [2021-06-05 14:04:10,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385249625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353438464] [2021-06-05 14:04:10,309 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 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 14:04:10,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353438464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:10,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:10,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618927352] [2021-06-05 14:04:10,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:10,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:10,366 INFO L87 Difference]: Start difference. First operand 2839 states and 8272 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:10,519 INFO L93 Difference]: Finished difference Result 5034 states and 14432 transitions. [2021-06-05 14:04:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:10,523 INFO L225 Difference]: With dead ends: 5034 [2021-06-05 14:04:10,523 INFO L226 Difference]: Without dead ends: 5034 [2021-06-05 14:04:10,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-06-05 14:04:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3008. [2021-06-05 14:04:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.9514466245427338) internal successors, (8875), 3007 states have internal predecessors, (8875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8875 transitions. [2021-06-05 14:04:10,560 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8875 transitions. Word has length 21 [2021-06-05 14:04:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:10,560 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8875 transitions. [2021-06-05 14:04:10,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8875 transitions. [2021-06-05 14:04:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:10,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:10,562 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:10,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15501 [2021-06-05 14:04:10,762 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273354, now seen corresponding path program 327 times [2021-06-05 14:04:10,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:10,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677628795] [2021-06-05 14:04:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:10,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677628795] [2021-06-05 14:04:10,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677628795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049244501] [2021-06-05 14:04:10,813 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 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 14:04:10,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:10,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049244501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:10,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:10,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837555191] [2021-06-05 14:04:10,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:10,870 INFO L87 Difference]: Start difference. First operand 3008 states and 8875 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:10,982 INFO L93 Difference]: Finished difference Result 3214 states and 9274 transitions. [2021-06-05 14:04:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:04:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:10,985 INFO L225 Difference]: With dead ends: 3214 [2021-06-05 14:04:10,985 INFO L226 Difference]: Without dead ends: 3204 [2021-06-05 14:04:10,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-06-05 14:04:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3008. [2021-06-05 14:04:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.950116395078151) internal successors, (8871), 3007 states have internal predecessors, (8871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8871 transitions. [2021-06-05 14:04:11,015 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8871 transitions. Word has length 21 [2021-06-05 14:04:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:11,015 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8871 transitions. [2021-06-05 14:04:11,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8871 transitions. [2021-06-05 14:04:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:11,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:11,017 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:11,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15502 [2021-06-05 14:04:11,218 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash -745057803, now seen corresponding path program 328 times [2021-06-05 14:04:11,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:11,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533094260] [2021-06-05 14:04:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:11,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533094260] [2021-06-05 14:04:11,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533094260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:11,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606892346] [2021-06-05 14:04:11,263 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 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 14:04:11,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:11,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:11,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:11,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606892346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:11,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:11,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:11,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651267122] [2021-06-05 14:04:11,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:11,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:11,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:11,314 INFO L87 Difference]: Start difference. First operand 3008 states and 8871 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:11,453 INFO L93 Difference]: Finished difference Result 3988 states and 11457 transitions. [2021-06-05 14:04:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:11,457 INFO L225 Difference]: With dead ends: 3988 [2021-06-05 14:04:11,457 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 14:04:11,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 14:04:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 1933. [2021-06-05 14:04:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9073498964803313) internal successors, (5617), 1932 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5617 transitions. [2021-06-05 14:04:11,483 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5617 transitions. Word has length 21 [2021-06-05 14:04:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:11,483 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 5617 transitions. [2021-06-05 14:04:11,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5617 transitions. [2021-06-05 14:04:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:11,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:11,485 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:11,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15503 [2021-06-05 14:04:11,685 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1768772814, now seen corresponding path program 329 times [2021-06-05 14:04:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:11,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47967219] [2021-06-05 14:04:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:11,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47967219] [2021-06-05 14:04:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47967219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:11,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477029416] [2021-06-05 14:04:11,719 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 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 14:04:11,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:11,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:11,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477029416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:11,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:11,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:11,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016240533] [2021-06-05 14:04:11,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:11,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:11,771 INFO L87 Difference]: Start difference. First operand 1933 states and 5617 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 14:04:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:11,815 INFO L93 Difference]: Finished difference Result 2184 states and 6076 transitions. [2021-06-05 14:04:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:11,815 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 21 [2021-06-05 14:04:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:11,817 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 14:04:11,817 INFO L226 Difference]: Without dead ends: 2182 [2021-06-05 14:04:11,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-06-05 14:04:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1921. [2021-06-05 14:04:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.9036458333333335) internal successors, (5575), 1920 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 5575 transitions. [2021-06-05 14:04:11,835 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 5575 transitions. Word has length 21 [2021-06-05 14:04:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:11,835 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 5575 transitions. [2021-06-05 14:04:11,835 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 14:04:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 5575 transitions. [2021-06-05 14:04:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:11,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:11,837 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:12,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15504,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:12,037 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:12,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:12,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1749044883, now seen corresponding path program 330 times [2021-06-05 14:04:12,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:12,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768690824] [2021-06-05 14:04:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768690824] [2021-06-05 14:04:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768690824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066526231] [2021-06-05 14:04:12,068 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 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 14:04:12,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:12,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066526231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:12,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:12,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107964760] [2021-06-05 14:04:12,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:12,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:12,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:12,117 INFO L87 Difference]: Start difference. First operand 1921 states and 5575 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 14:04:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:12,203 INFO L93 Difference]: Finished difference Result 2090 states and 5850 transitions. [2021-06-05 14:04:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:12,203 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 21 [2021-06-05 14:04:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:12,205 INFO L225 Difference]: With dead ends: 2090 [2021-06-05 14:04:12,205 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 14:04:12,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 14:04:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1932. [2021-06-05 14:04:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9047125841532884) internal successors, (5609), 1931 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5609 transitions. [2021-06-05 14:04:12,224 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5609 transitions. Word has length 21 [2021-06-05 14:04:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:12,225 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 5609 transitions. [2021-06-05 14:04:12,225 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 14:04:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5609 transitions. [2021-06-05 14:04:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:12,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:12,226 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:12,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15505 [2021-06-05 14:04:12,427 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1217034640, now seen corresponding path program 331 times [2021-06-05 14:04:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5340676] [2021-06-05 14:04:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:12,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5340676] [2021-06-05 14:04:12,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5340676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359706275] [2021-06-05 14:04:12,477 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 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 14:04:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359706275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:12,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:12,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690903889] [2021-06-05 14:04:12,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:12,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:12,525 INFO L87 Difference]: Start difference. First operand 1932 states and 5609 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:12,639 INFO L93 Difference]: Finished difference Result 2179 states and 6040 transitions. [2021-06-05 14:04:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:12,641 INFO L225 Difference]: With dead ends: 2179 [2021-06-05 14:04:12,641 INFO L226 Difference]: Without dead ends: 2173 [2021-06-05 14:04:12,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-06-05 14:04:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1910. [2021-06-05 14:04:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.900995285489785) internal successors, (5538), 1909 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5538 transitions. [2021-06-05 14:04:12,660 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5538 transitions. Word has length 21 [2021-06-05 14:04:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:12,660 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 5538 transitions. [2021-06-05 14:04:12,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5538 transitions. [2021-06-05 14:04:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:12,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:12,662 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:12,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15506,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:12,862 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1936653967, now seen corresponding path program 332 times [2021-06-05 14:04:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:12,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868999666] [2021-06-05 14:04:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868999666] [2021-06-05 14:04:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868999666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839690521] [2021-06-05 14:04:12,902 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 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 14:04:12,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839690521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:12,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:12,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484673888] [2021-06-05 14:04:12,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:12,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:12,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:12,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:12,953 INFO L87 Difference]: Start difference. First operand 1910 states and 5538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:13,029 INFO L93 Difference]: Finished difference Result 2223 states and 6180 transitions. [2021-06-05 14:04:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:13,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:13,031 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 14:04:13,031 INFO L226 Difference]: Without dead ends: 2221 [2021-06-05 14:04:13,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-05 14:04:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1885. [2021-06-05 14:04:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 2.8959660297239913) internal successors, (5456), 1884 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5456 transitions. [2021-06-05 14:04:13,050 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5456 transitions. Word has length 21 [2021-06-05 14:04:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:13,050 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5456 transitions. [2021-06-05 14:04:13,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5456 transitions. [2021-06-05 14:04:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:13,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:13,052 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:13,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-06-05 14:04:13,252 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1430307701, now seen corresponding path program 333 times [2021-06-05 14:04:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:13,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269436098] [2021-06-05 14:04:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:13,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:13,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269436098] [2021-06-05 14:04:13,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269436098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587359269] [2021-06-05 14:04:13,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:13,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:13,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:13,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587359269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:13,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664977479] [2021-06-05 14:04:13,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:13,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:13,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:13,345 INFO L87 Difference]: Start difference. First operand 1885 states and 5456 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:13,405 INFO L93 Difference]: Finished difference Result 2639 states and 7430 transitions. [2021-06-05 14:04:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:04:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 21 [2021-06-05 14:04:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:13,408 INFO L225 Difference]: With dead ends: 2639 [2021-06-05 14:04:13,408 INFO L226 Difference]: Without dead ends: 2639 [2021-06-05 14:04:13,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-06-05 14:04:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2332. [2021-06-05 14:04:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.891033891033891) internal successors, (6739), 2331 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 6739 transitions. [2021-06-05 14:04:13,432 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 6739 transitions. Word has length 21 [2021-06-05 14:04:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:13,432 INFO L482 AbstractCegarLoop]: Abstraction has 2332 states and 6739 transitions. [2021-06-05 14:04:13,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 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 14:04:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 6739 transitions. [2021-06-05 14:04:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:13,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:13,434 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:13,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15508 [2021-06-05 14:04:13,634 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:13,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1868227088, now seen corresponding path program 334 times [2021-06-05 14:04:13,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:13,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269919307] [2021-06-05 14:04:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:13,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:13,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269919307] [2021-06-05 14:04:13,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269919307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525480625] [2021-06-05 14:04:13,687 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 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 14:04:13,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:13,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525480625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:13,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:13,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248357776] [2021-06-05 14:04:13,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:13,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:13,736 INFO L87 Difference]: Start difference. First operand 2332 states and 6739 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:13,857 INFO L93 Difference]: Finished difference Result 2899 states and 8005 transitions. [2021-06-05 14:04:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:13,859 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 14:04:13,859 INFO L226 Difference]: Without dead ends: 2889 [2021-06-05 14:04:13,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-06-05 14:04:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2339. [2021-06-05 14:04:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.8896492728828056) internal successors, (6756), 2338 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6756 transitions. [2021-06-05 14:04:13,883 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6756 transitions. Word has length 21 [2021-06-05 14:04:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:13,883 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 6756 transitions. [2021-06-05 14:04:13,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6756 transitions. [2021-06-05 14:04:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:13,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:13,885 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:14,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15509,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:14,085 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:14,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1381524657, now seen corresponding path program 335 times [2021-06-05 14:04:14,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:14,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185505697] [2021-06-05 14:04:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:14,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:14,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185505697] [2021-06-05 14:04:14,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185505697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:14,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964448845] [2021-06-05 14:04:14,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:14,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:14,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:14,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964448845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:14,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:14,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:14,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301216490] [2021-06-05 14:04:14,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:14,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:14,183 INFO L87 Difference]: Start difference. First operand 2339 states and 6756 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:14,287 INFO L93 Difference]: Finished difference Result 2784 states and 7761 transitions. [2021-06-05 14:04:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:14,290 INFO L225 Difference]: With dead ends: 2784 [2021-06-05 14:04:14,290 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 14:04:14,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 14:04:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2068. [2021-06-05 14:04:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864537977745525) internal successors, (5921), 2067 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5921 transitions. [2021-06-05 14:04:14,312 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5921 transitions. Word has length 21 [2021-06-05 14:04:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:14,312 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5921 transitions. [2021-06-05 14:04:14,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5921 transitions. [2021-06-05 14:04:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:14,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:14,314 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:14,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15510,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:14,514 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1023255636, now seen corresponding path program 336 times [2021-06-05 14:04:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:14,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891080190] [2021-06-05 14:04:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:14,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891080190] [2021-06-05 14:04:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891080190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14155898] [2021-06-05 14:04:14,569 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 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 14:04:14,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:14,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14155898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:14,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:14,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:14,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286307719] [2021-06-05 14:04:14,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:14,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:14,622 INFO L87 Difference]: Start difference. First operand 2068 states and 5921 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:14,710 INFO L93 Difference]: Finished difference Result 2495 states and 6829 transitions. [2021-06-05 14:04:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:14,713 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 14:04:14,713 INFO L226 Difference]: Without dead ends: 2483 [2021-06-05 14:04:14,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-06-05 14:04:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2068. [2021-06-05 14:04:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864054184808902) internal successors, (5920), 2067 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5920 transitions. [2021-06-05 14:04:14,734 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5920 transitions. Word has length 21 [2021-06-05 14:04:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:14,734 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5920 transitions. [2021-06-05 14:04:14,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5920 transitions. [2021-06-05 14:04:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:14,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:14,735 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:14,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15511 [2021-06-05 14:04:14,936 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1645985461, now seen corresponding path program 337 times [2021-06-05 14:04:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:14,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598721595] [2021-06-05 14:04:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:14,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:14,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598721595] [2021-06-05 14:04:14,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598721595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:14,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228808346] [2021-06-05 14:04:14,985 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 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 14:04:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:15,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:15,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228808346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:15,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:15,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416181734] [2021-06-05 14:04:15,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:15,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:15,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:15,036 INFO L87 Difference]: Start difference. First operand 2068 states and 5920 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:15,206 INFO L93 Difference]: Finished difference Result 3237 states and 8989 transitions. [2021-06-05 14:04:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:04:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:15,209 INFO L225 Difference]: With dead ends: 3237 [2021-06-05 14:04:15,209 INFO L226 Difference]: Without dead ends: 3237 [2021-06-05 14:04:15,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-06-05 14:04:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2165. [2021-06-05 14:04:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.863678373382625) internal successors, (6197), 2164 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6197 transitions. [2021-06-05 14:04:15,235 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6197 transitions. Word has length 21 [2021-06-05 14:04:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:15,235 INFO L482 AbstractCegarLoop]: Abstraction has 2165 states and 6197 transitions. [2021-06-05 14:04:15,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6197 transitions. [2021-06-05 14:04:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:15,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:15,237 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:15,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15512 [2021-06-05 14:04:15,437 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash 94608648, now seen corresponding path program 338 times [2021-06-05 14:04:15,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:15,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720417121] [2021-06-05 14:04:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:15,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720417121] [2021-06-05 14:04:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720417121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438094752] [2021-06-05 14:04:15,481 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 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 14:04:15,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:15,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:15,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:15,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438094752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:15,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650865021] [2021-06-05 14:04:15,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:15,534 INFO L87 Difference]: Start difference. First operand 2165 states and 6197 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:04:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:15,614 INFO L93 Difference]: Finished difference Result 2340 states and 6503 transitions. [2021-06-05 14:04:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21 [2021-06-05 14:04:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:15,616 INFO L225 Difference]: With dead ends: 2340 [2021-06-05 14:04:15,616 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 14:04:15,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 14:04:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2135. [2021-06-05 14:04:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8533270852858483) internal successors, (6089), 2134 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6089 transitions. [2021-06-05 14:04:15,637 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6089 transitions. Word has length 21 [2021-06-05 14:04:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:15,637 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 6089 transitions. [2021-06-05 14:04:15,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:04:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6089 transitions. [2021-06-05 14:04:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:15,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:15,639 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:15,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15513 [2021-06-05 14:04:15,839 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash 578153513, now seen corresponding path program 339 times [2021-06-05 14:04:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:15,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816878806] [2021-06-05 14:04:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:15,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816878806] [2021-06-05 14:04:15,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816878806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723886141] [2021-06-05 14:04:15,882 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 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 14:04:15,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:15,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:15,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723886141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:15,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471196570] [2021-06-05 14:04:15,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:15,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:15,933 INFO L87 Difference]: Start difference. First operand 2135 states and 6089 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:04:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:16,067 INFO L93 Difference]: Finished difference Result 2321 states and 6379 transitions. [2021-06-05 14:04:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:04:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21 [2021-06-05 14:04:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:16,069 INFO L225 Difference]: With dead ends: 2321 [2021-06-05 14:04:16,069 INFO L226 Difference]: Without dead ends: 2315 [2021-06-05 14:04:16,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-06-05 14:04:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2135. [2021-06-05 14:04:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8509840674789126) internal successors, (6084), 2134 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6084 transitions. [2021-06-05 14:04:16,089 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6084 transitions. Word has length 21 [2021-06-05 14:04:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:16,089 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 6084 transitions. [2021-06-05 14:04:16,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14:04:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6084 transitions. [2021-06-05 14:04:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:16,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:16,091 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:16,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15514,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:16,292 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1541604198, now seen corresponding path program 340 times [2021-06-05 14:04:16,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:16,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775009848] [2021-06-05 14:04:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:16,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775009848] [2021-06-05 14:04:16,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775009848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822280852] [2021-06-05 14:04:16,342 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 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 14:04:16,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822280852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:16,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176253264] [2021-06-05 14:04:16,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:16,390 INFO L87 Difference]: Start difference. First operand 2135 states and 6084 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:16,513 INFO L93 Difference]: Finished difference Result 2405 states and 6657 transitions. [2021-06-05 14:04:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:16,515 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 14:04:16,515 INFO L226 Difference]: Without dead ends: 2395 [2021-06-05 14:04:16,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-05 14:04:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2157. [2021-06-05 14:04:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.8501855287569575) internal successors, (6145), 2156 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6145 transitions. [2021-06-05 14:04:16,538 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6145 transitions. Word has length 21 [2021-06-05 14:04:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:16,538 INFO L482 AbstractCegarLoop]: Abstraction has 2157 states and 6145 transitions. [2021-06-05 14:04:16,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6145 transitions. [2021-06-05 14:04:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:16,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:16,540 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:16,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15515 [2021-06-05 14:04:16,741 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1708147547, now seen corresponding path program 341 times [2021-06-05 14:04:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127348217] [2021-06-05 14:04:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127348217] [2021-06-05 14:04:16,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127348217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841907308] [2021-06-05 14:04:16,789 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 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 14:04:16,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:16,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:16,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841907308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:16,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:16,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697447088] [2021-06-05 14:04:16,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:16,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:16,841 INFO L87 Difference]: Start difference. First operand 2157 states and 6145 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:16,943 INFO L93 Difference]: Finished difference Result 2688 states and 7467 transitions. [2021-06-05 14:04:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:16,946 INFO L225 Difference]: With dead ends: 2688 [2021-06-05 14:04:16,946 INFO L226 Difference]: Without dead ends: 2686 [2021-06-05 14:04:16,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-05 14:04:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1554. [2021-06-05 14:04:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8126207340631035) internal successors, (4368), 1553 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4368 transitions. [2021-06-05 14:04:16,964 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4368 transitions. Word has length 21 [2021-06-05 14:04:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:16,964 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 4368 transitions. [2021-06-05 14:04:16,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4368 transitions. [2021-06-05 14:04:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:16,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:16,966 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:17,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15516 [2021-06-05 14:04:17,166 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:17,166 INFO L82 PathProgramCache]: Analyzing trace with hash 696632746, now seen corresponding path program 342 times [2021-06-05 14:04:17,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:17,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194233131] [2021-06-05 14:04:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194233131] [2021-06-05 14:04:17,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194233131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853845098] [2021-06-05 14:04:17,221 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 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 14:04:17,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:17,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:17,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853845098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:17,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282042935] [2021-06-05 14:04:17,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:17,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:17,271 INFO L87 Difference]: Start difference. First operand 1554 states and 4368 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:17,370 INFO L93 Difference]: Finished difference Result 1983 states and 5292 transitions. [2021-06-05 14:04:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:17,372 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 14:04:17,372 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 14:04:17,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 14:04:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1554. [2021-06-05 14:04:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8106889890534448) internal successors, (4365), 1553 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4365 transitions. [2021-06-05 14:04:17,388 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4365 transitions. Word has length 21 [2021-06-05 14:04:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:17,388 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 4365 transitions. [2021-06-05 14:04:17,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4365 transitions. [2021-06-05 14:04:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:17,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:17,390 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:17,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15517 [2021-06-05 14:04:17,590 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1319362571, now seen corresponding path program 343 times [2021-06-05 14:04:17,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:17,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234325172] [2021-06-05 14:04:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:17,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234325172] [2021-06-05 14:04:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234325172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125124775] [2021-06-05 14:04:17,641 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 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 14:04:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:17,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125124775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:17,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:17,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148035900] [2021-06-05 14:04:17,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:17,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:17,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:17,692 INFO L87 Difference]: Start difference. First operand 1554 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:17,857 INFO L93 Difference]: Finished difference Result 2612 states and 7115 transitions. [2021-06-05 14:04:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:04:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:17,860 INFO L225 Difference]: With dead ends: 2612 [2021-06-05 14:04:17,860 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 14:04:17,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 14:04:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1490. [2021-06-05 14:04:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 2.8280725319006046) internal successors, (4211), 1489 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4211 transitions. [2021-06-05 14:04:17,878 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4211 transitions. Word has length 21 [2021-06-05 14:04:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:17,878 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 4211 transitions. [2021-06-05 14:04:17,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4211 transitions. [2021-06-05 14:04:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:17,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:17,879 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:18,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15518,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:18,080 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1179807206, now seen corresponding path program 344 times [2021-06-05 14:04:18,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:18,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92831473] [2021-06-05 14:04:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:18,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:18,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92831473] [2021-06-05 14:04:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92831473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992100672] [2021-06-05 14:04:18,126 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 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 14:04:18,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:18,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:18,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992100672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:18,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:18,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327158119] [2021-06-05 14:04:18,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:18,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:18,178 INFO L87 Difference]: Start difference. First operand 1490 states and 4211 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:04:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:18,245 INFO L93 Difference]: Finished difference Result 1712 states and 4615 transitions. [2021-06-05 14:04:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-06-05 14:04:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:18,247 INFO L225 Difference]: With dead ends: 1712 [2021-06-05 14:04:18,247 INFO L226 Difference]: Without dead ends: 1712 [2021-06-05 14:04:18,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-05 14:04:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1470. [2021-06-05 14:04:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.821647379169503) internal successors, (4145), 1469 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4145 transitions. [2021-06-05 14:04:18,262 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4145 transitions. Word has length 21 [2021-06-05 14:04:18,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:18,262 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4145 transitions. [2021-06-05 14:04:18,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:04:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4145 transitions. [2021-06-05 14:04:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:18,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:18,263 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:18,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15519,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:18,463 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993883, now seen corresponding path program 345 times [2021-06-05 14:04:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:18,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082546325] [2021-06-05 14:04:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:18,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:18,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082546325] [2021-06-05 14:04:18,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082546325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351912672] [2021-06-05 14:04:18,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:18,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:18,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:18,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351912672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:18,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:18,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243075973] [2021-06-05 14:04:18,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:18,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:18,549 INFO L87 Difference]: Start difference. First operand 1470 states and 4145 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:04:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:18,657 INFO L93 Difference]: Finished difference Result 1612 states and 4366 transitions. [2021-06-05 14:04:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-06-05 14:04:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:18,658 INFO L225 Difference]: With dead ends: 1612 [2021-06-05 14:04:18,658 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 14:04:18,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 14:04:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1454. [2021-06-05 14:04:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 2.8183069511355816) internal successors, (4095), 1453 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4095 transitions. [2021-06-05 14:04:18,673 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4095 transitions. Word has length 21 [2021-06-05 14:04:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:18,673 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4095 transitions. [2021-06-05 14:04:18,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 14:04:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4095 transitions. [2021-06-05 14:04:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:18,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:18,674 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:18,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15520,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:18,875 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:18,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1062657916, now seen corresponding path program 346 times [2021-06-05 14:04:18,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:18,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599985754] [2021-06-05 14:04:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:18,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:18,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599985754] [2021-06-05 14:04:18,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599985754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979750448] [2021-06-05 14:04:18,929 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 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 14:04:18,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:18,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979750448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:18,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:18,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:18,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953169297] [2021-06-05 14:04:18,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:18,983 INFO L87 Difference]: Start difference. First operand 1454 states and 4095 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:04:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:19,120 INFO L93 Difference]: Finished difference Result 1781 states and 4786 transitions. [2021-06-05 14:04:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:04:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:04:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:19,122 INFO L225 Difference]: With dead ends: 1781 [2021-06-05 14:04:19,122 INFO L226 Difference]: Without dead ends: 1769 [2021-06-05 14:04:19,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-06-05 14:04:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1460. [2021-06-05 14:04:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.8115147361206305) internal successors, (4102), 1459 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4102 transitions. [2021-06-05 14:04:19,138 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4102 transitions. Word has length 21 [2021-06-05 14:04:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:19,138 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 4102 transitions. [2021-06-05 14:04:19,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:04:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4102 transitions. [2021-06-05 14:04:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:19,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:19,139 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:19,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15521,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:19,339 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash -439928091, now seen corresponding path program 347 times [2021-06-05 14:04:19,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:19,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904677426] [2021-06-05 14:04:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:19,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:19,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904677426] [2021-06-05 14:04:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904677426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:19,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699841814] [2021-06-05 14:04:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:19,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:04:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:19,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699841814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:19,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:19,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14788137] [2021-06-05 14:04:19,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:19,447 INFO L87 Difference]: Start difference. First operand 1460 states and 4102 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:04:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:19,599 INFO L93 Difference]: Finished difference Result 1843 states and 4934 transitions. [2021-06-05 14:04:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:04:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:19,601 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 14:04:19,601 INFO L226 Difference]: Without dead ends: 1839 [2021-06-05 14:04:19,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-06-05 14:04:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1157. [2021-06-05 14:04:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7889273356401385) internal successors, (3224), 1156 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3224 transitions. [2021-06-05 14:04:19,614 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3224 transitions. Word has length 21 [2021-06-05 14:04:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:19,614 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3224 transitions. [2021-06-05 14:04:19,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:04:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3224 transitions. [2021-06-05 14:04:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:19,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:19,615 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:19,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15522,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:19,815 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2110322360, now seen corresponding path program 348 times [2021-06-05 14:04:19,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:19,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299725882] [2021-06-05 14:04:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:19,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:19,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299725882] [2021-06-05 14:04:19,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299725882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:19,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624087109] [2021-06-05 14:04:19,850 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 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 14:04:19,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:19,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624087109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:19,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:19,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:19,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406636869] [2021-06-05 14:04:19,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:19,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:19,904 INFO L87 Difference]: Start difference. First operand 1157 states and 3224 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 14:04:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:19,950 INFO L93 Difference]: Finished difference Result 1482 states and 3827 transitions. [2021-06-05 14:04:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:19,951 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 21 [2021-06-05 14:04:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:19,952 INFO L225 Difference]: With dead ends: 1482 [2021-06-05 14:04:19,952 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 14:04:19,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 14:04:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1173. [2021-06-05 14:04:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.803754266211604) internal successors, (3286), 1172 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3286 transitions. [2021-06-05 14:04:19,964 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3286 transitions. Word has length 21 [2021-06-05 14:04:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:19,964 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3286 transitions. [2021-06-05 14:04:19,964 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 14:04:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3286 transitions. [2021-06-05 14:04:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:19,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:19,965 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:20,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15523 [2021-06-05 14:04:20,165 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1407495337, now seen corresponding path program 349 times [2021-06-05 14:04:20,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:20,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942341257] [2021-06-05 14:04:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:20,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:20,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942341257] [2021-06-05 14:04:20,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942341257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846906864] [2021-06-05 14:04:20,204 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 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 14:04:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:20,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846906864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:20,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:04:20,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347362630] [2021-06-05 14:04:20,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:04:20,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:04:20,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:04:20,252 INFO L87 Difference]: Start difference. First operand 1173 states and 3286 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 14:04:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:20,344 INFO L93 Difference]: Finished difference Result 1332 states and 3551 transitions. [2021-06-05 14:04:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:20,345 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 21 [2021-06-05 14:04:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:20,346 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 14:04:20,346 INFO L226 Difference]: Without dead ends: 1330 [2021-06-05 14:04:20,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-05 14:04:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1184. [2021-06-05 14:04:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.808114961961116) internal successors, (3322), 1183 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:20,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3322 transitions. [2021-06-05 14:04:20,357 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3322 transitions. Word has length 21 [2021-06-05 14:04:20,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:20,357 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3322 transitions. [2021-06-05 14:04:20,357 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 14:04:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3322 transitions. [2021-06-05 14:04:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:20,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:20,358 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:20,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15524,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:20,559 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1948570474, now seen corresponding path program 350 times [2021-06-05 14:04:20,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:20,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439961287] [2021-06-05 14:04:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:20,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:20,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439961287] [2021-06-05 14:04:20,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439961287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592888641] [2021-06-05 14:04:20,605 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 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 14:04:20,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:20,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:20,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:20,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592888641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:20,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:20,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786642428] [2021-06-05 14:04:20,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:20,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:20,654 INFO L87 Difference]: Start difference. First operand 1184 states and 3322 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:20,754 INFO L93 Difference]: Finished difference Result 1469 states and 3818 transitions. [2021-06-05 14:04:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:20,756 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 14:04:20,756 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 14:04:20,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 14:04:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1184. [2021-06-05 14:04:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.804733727810651) internal successors, (3318), 1183 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3318 transitions. [2021-06-05 14:04:20,767 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3318 transitions. Word has length 21 [2021-06-05 14:04:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:20,767 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3318 transitions. [2021-06-05 14:04:20,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3318 transitions. [2021-06-05 14:04:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:20,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:20,768 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:20,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15525 [2021-06-05 14:04:20,969 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:20,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1057248843, now seen corresponding path program 351 times [2021-06-05 14:04:20,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:20,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735474995] [2021-06-05 14:04:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735474995] [2021-06-05 14:04:21,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735474995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011557181] [2021-06-05 14:04:21,006 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 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 14:04:21,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011557181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:21,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:21,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140562412] [2021-06-05 14:04:21,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:21,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:21,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:21,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:21,060 INFO L87 Difference]: Start difference. First operand 1184 states and 3318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:21,146 INFO L93 Difference]: Finished difference Result 1448 states and 3844 transitions. [2021-06-05 14:04:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:21,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 14:04:21,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:21,147 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 14:04:21,148 INFO L226 Difference]: Without dead ends: 1448 [2021-06-05 14:04:21,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-06-05 14:04:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1157. [2021-06-05 14:04:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7949826989619377) internal successors, (3231), 1156 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3231 transitions. [2021-06-05 14:04:21,159 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3231 transitions. Word has length 21 [2021-06-05 14:04:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:21,159 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3231 transitions. [2021-06-05 14:04:21,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 14:04:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3231 transitions. [2021-06-05 14:04:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:21,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:21,160 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:21,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15526 [2021-06-05 14:04:21,361 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1969576682, now seen corresponding path program 352 times [2021-06-05 14:04:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:21,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143997275] [2021-06-05 14:04:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:21,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143997275] [2021-06-05 14:04:21,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143997275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817658777] [2021-06-05 14:04:21,408 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:04:21,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817658777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:21,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:21,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343706022] [2021-06-05 14:04:21,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:21,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:21,462 INFO L87 Difference]: Start difference. First operand 1157 states and 3231 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:21,588 INFO L93 Difference]: Finished difference Result 1462 states and 3767 transitions. [2021-06-05 14:04:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:21,590 INFO L225 Difference]: With dead ends: 1462 [2021-06-05 14:04:21,590 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 14:04:21,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 14:04:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1157. [2021-06-05 14:04:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7932525951557095) internal successors, (3229), 1156 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3229 transitions. [2021-06-05 14:04:21,601 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3229 transitions. Word has length 21 [2021-06-05 14:04:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:21,601 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3229 transitions. [2021-06-05 14:04:21,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3229 transitions. [2021-06-05 14:04:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:21,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:21,602 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:21,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15527 [2021-06-05 14:04:21,803 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1088758155, now seen corresponding path program 353 times [2021-06-05 14:04:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:21,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180894354] [2021-06-05 14:04:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:21,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180894354] [2021-06-05 14:04:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180894354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090516769] [2021-06-05 14:04:21,846 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 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 14:04:21,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:04:21,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:21,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090516769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:21,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:21,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997642045] [2021-06-05 14:04:21,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:21,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:21,903 INFO L87 Difference]: Start difference. First operand 1157 states and 3229 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:21,995 INFO L93 Difference]: Finished difference Result 1409 states and 3711 transitions. [2021-06-05 14:04:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:21,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:21,996 INFO L225 Difference]: With dead ends: 1409 [2021-06-05 14:04:21,996 INFO L226 Difference]: Without dead ends: 1405 [2021-06-05 14:04:21,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-06-05 14:04:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1044. [2021-06-05 14:04:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.771812080536913) internal successors, (2891), 1043 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2891 transitions. [2021-06-05 14:04:22,007 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2891 transitions. Word has length 21 [2021-06-05 14:04:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:22,007 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 2891 transitions. [2021-06-05 14:04:22,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2891 transitions. [2021-06-05 14:04:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:22,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:22,008 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:22,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15528 [2021-06-05 14:04:22,208 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1723074203, now seen corresponding path program 354 times [2021-06-05 14:04:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058171088] [2021-06-05 14:04:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:22,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058171088] [2021-06-05 14:04:22,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058171088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413580540] [2021-06-05 14:04:22,254 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 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 14:04:22,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:04:22,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:22,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:22,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413580540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:22,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:22,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559767748] [2021-06-05 14:04:22,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:22,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:22,313 INFO L87 Difference]: Start difference. First operand 1044 states and 2891 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:22,392 INFO L93 Difference]: Finished difference Result 1522 states and 3994 transitions. [2021-06-05 14:04:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-06-05 14:04:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:22,394 INFO L225 Difference]: With dead ends: 1522 [2021-06-05 14:04:22,394 INFO L226 Difference]: Without dead ends: 1522 [2021-06-05 14:04:22,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-06-05 14:04:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1262. [2021-06-05 14:04:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7731958762886597) internal successors, (3497), 1261 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3497 transitions. [2021-06-05 14:04:22,406 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3497 transitions. Word has length 21 [2021-06-05 14:04:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:22,406 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 3497 transitions. [2021-06-05 14:04:22,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 14:04:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3497 transitions. [2021-06-05 14:04:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:22,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:22,407 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:22,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15529 [2021-06-05 14:04:22,608 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash 681706090, now seen corresponding path program 355 times [2021-06-05 14:04:22,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:22,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612299571] [2021-06-05 14:04:22,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:22,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:22,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612299571] [2021-06-05 14:04:22,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612299571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896909866] [2021-06-05 14:04:22,663 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 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 14:04:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:22,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:22,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896909866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:22,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:22,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:22,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620494106] [2021-06-05 14:04:22,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:22,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:22,718 INFO L87 Difference]: Start difference. First operand 1262 states and 3497 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:04:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:22,856 INFO L93 Difference]: Finished difference Result 2034 states and 5233 transitions. [2021-06-05 14:04:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:04:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:22,858 INFO L225 Difference]: With dead ends: 2034 [2021-06-05 14:04:22,858 INFO L226 Difference]: Without dead ends: 2022 [2021-06-05 14:04:22,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-05 14:04:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1292. [2021-06-05 14:04:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.7683965917893105) internal successors, (3574), 1291 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3574 transitions. [2021-06-05 14:04:22,872 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3574 transitions. Word has length 21 [2021-06-05 14:04:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:22,872 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 3574 transitions. [2021-06-05 14:04:22,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:04:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3574 transitions. [2021-06-05 14:04:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:22,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:22,873 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:23,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15530,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:23,073 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:23,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1304435915, now seen corresponding path program 356 times [2021-06-05 14:04:23,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:23,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707709835] [2021-06-05 14:04:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:23,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:23,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707709835] [2021-06-05 14:04:23,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707709835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778923688] [2021-06-05 14:04:23,125 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 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 14:04:23,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:23,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:23,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778923688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:23,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:23,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051564256] [2021-06-05 14:04:23,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:23,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:23,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:23,183 INFO L87 Difference]: Start difference. First operand 1292 states and 3574 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:04:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:23,314 INFO L93 Difference]: Finished difference Result 1611 states and 4182 transitions. [2021-06-05 14:04:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:04:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:23,315 INFO L225 Difference]: With dead ends: 1611 [2021-06-05 14:04:23,315 INFO L226 Difference]: Without dead ends: 1611 [2021-06-05 14:04:23,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-05 14:04:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1257. [2021-06-05 14:04:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.7619426751592355) internal successors, (3469), 1256 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3469 transitions. [2021-06-05 14:04:23,328 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3469 transitions. Word has length 21 [2021-06-05 14:04:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:23,328 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3469 transitions. [2021-06-05 14:04:23,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:04:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3469 transitions. [2021-06-05 14:04:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:23,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:23,329 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:23,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15531,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:23,530 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash 257394854, now seen corresponding path program 357 times [2021-06-05 14:04:23,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:23,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278270714] [2021-06-05 14:04:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:23,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278270714] [2021-06-05 14:04:23,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278270714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536335818] [2021-06-05 14:04:23,587 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 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 14:04:23,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:23,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:23,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:23,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:23,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536335818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:23,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:23,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:23,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376118705] [2021-06-05 14:04:23,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:23,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:23,645 INFO L87 Difference]: Start difference. First operand 1257 states and 3469 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:04:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:23,743 INFO L93 Difference]: Finished difference Result 1884 states and 4813 transitions. [2021-06-05 14:04:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:04:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:23,745 INFO L225 Difference]: With dead ends: 1884 [2021-06-05 14:04:23,745 INFO L226 Difference]: Without dead ends: 1870 [2021-06-05 14:04:23,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-06-05 14:04:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1262. [2021-06-05 14:04:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7573354480570975) internal successors, (3477), 1261 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3477 transitions. [2021-06-05 14:04:23,759 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3477 transitions. Word has length 21 [2021-06-05 14:04:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:23,759 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 3477 transitions. [2021-06-05 14:04:23,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:04:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3477 transitions. [2021-06-05 14:04:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:23,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:23,760 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:23,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15532,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:23,961 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash 667969061, now seen corresponding path program 358 times [2021-06-05 14:04:23,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:23,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768065587] [2021-06-05 14:04:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:24,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768065587] [2021-06-05 14:04:24,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768065587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456982498] [2021-06-05 14:04:24,016 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 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 14:04:24,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:24,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456982498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724154826] [2021-06-05 14:04:24,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:24,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:24,074 INFO L87 Difference]: Start difference. First operand 1262 states and 3477 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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 14:04:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:24,271 INFO L93 Difference]: Finished difference Result 1832 states and 4763 transitions. [2021-06-05 14:04:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:04:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-06-05 14:04:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:24,273 INFO L225 Difference]: With dead ends: 1832 [2021-06-05 14:04:24,273 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 14:04:24,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=376, Invalid=746, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:04:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 14:04:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1349. [2021-06-05 14:04:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.770771513353116) internal successors, (3735), 1348 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3735 transitions. [2021-06-05 14:04:24,287 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3735 transitions. Word has length 21 [2021-06-05 14:04:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:24,287 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3735 transitions. [2021-06-05 14:04:24,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) 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 14:04:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3735 transitions. [2021-06-05 14:04:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:24,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:24,288 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:24,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15533 [2021-06-05 14:04:24,489 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1440766350, now seen corresponding path program 359 times [2021-06-05 14:04:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:24,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176506779] [2021-06-05 14:04:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176506779] [2021-06-05 14:04:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176506779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519250041] [2021-06-05 14:04:24,541 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 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 14:04:24,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519250041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:24,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696951702] [2021-06-05 14:04:24,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:24,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:24,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:24,595 INFO L87 Difference]: Start difference. First operand 1349 states and 3735 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:24,694 INFO L93 Difference]: Finished difference Result 1621 states and 4225 transitions. [2021-06-05 14:04:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-05 14:04:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:24,696 INFO L225 Difference]: With dead ends: 1621 [2021-06-05 14:04:24,696 INFO L226 Difference]: Without dead ends: 1617 [2021-06-05 14:04:24,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-05 14:04:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1383. [2021-06-05 14:04:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.7836468885672936) internal successors, (3847), 1382 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3847 transitions. [2021-06-05 14:04:24,710 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3847 transitions. Word has length 21 [2021-06-05 14:04:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:24,710 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3847 transitions. [2021-06-05 14:04:24,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3847 transitions. [2021-06-05 14:04:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:24,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:24,711 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:24,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15534 [2021-06-05 14:04:24,911 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash -957221485, now seen corresponding path program 360 times [2021-06-05 14:04:24,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:24,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467037427] [2021-06-05 14:04:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:24,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467037427] [2021-06-05 14:04:24,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467037427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636975780] [2021-06-05 14:04:24,968 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 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 14:04:24,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:24,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:24,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636975780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:25,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:04:25,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813283553] [2021-06-05 14:04:25,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:25,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:25,020 INFO L87 Difference]: Start difference. First operand 1383 states and 3847 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:25,190 INFO L93 Difference]: Finished difference Result 1662 states and 4335 transitions. [2021-06-05 14:04:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-05 14:04:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:25,192 INFO L225 Difference]: With dead ends: 1662 [2021-06-05 14:04:25,192 INFO L226 Difference]: Without dead ends: 1656 [2021-06-05 14:04:25,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-05 14:04:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1398. [2021-06-05 14:04:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7931281317108088) internal successors, (3902), 1397 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3902 transitions. [2021-06-05 14:04:25,206 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3902 transitions. Word has length 21 [2021-06-05 14:04:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:25,206 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 3902 transitions. [2021-06-05 14:04:25,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3902 transitions. [2021-06-05 14:04:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:25,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:25,208 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:25,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15535 [2021-06-05 14:04:25,408 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1489231728, now seen corresponding path program 361 times [2021-06-05 14:04:25,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:25,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002456323] [2021-06-05 14:04:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002456323] [2021-06-05 14:04:25,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002456323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396807847] [2021-06-05 14:04:25,451 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 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 14:04:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396807847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999259305] [2021-06-05 14:04:25,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:25,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:25,499 INFO L87 Difference]: Start difference. First operand 1398 states and 3902 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 14:04:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:25,598 INFO L93 Difference]: Finished difference Result 1568 states and 4165 transitions. [2021-06-05 14:04:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:25,598 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 21 [2021-06-05 14:04:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:25,600 INFO L225 Difference]: With dead ends: 1568 [2021-06-05 14:04:25,600 INFO L226 Difference]: Without dead ends: 1566 [2021-06-05 14:04:25,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-06-05 14:04:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-06-05 14:04:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7924123120973516) internal successors, (3901), 1397 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3901 transitions. [2021-06-05 14:04:25,614 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3901 transitions. Word has length 21 [2021-06-05 14:04:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:25,614 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 3901 transitions. [2021-06-05 14:04:25,614 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 14:04:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3901 transitions. [2021-06-05 14:04:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:25,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:25,615 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:25,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15536 [2021-06-05 14:04:25,816 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1169711439, now seen corresponding path program 362 times [2021-06-05 14:04:25,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:25,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125074156] [2021-06-05 14:04:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:25,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125074156] [2021-06-05 14:04:25,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125074156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517418879] [2021-06-05 14:04:25,862 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 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 14:04:25,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:25,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517418879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:25,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:25,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:25,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613017470] [2021-06-05 14:04:25,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:25,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:25,916 INFO L87 Difference]: Start difference. First operand 1398 states and 3901 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 14:04:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:25,978 INFO L93 Difference]: Finished difference Result 1703 states and 4442 transitions. [2021-06-05 14:04:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:25,978 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 21 [2021-06-05 14:04:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:25,980 INFO L225 Difference]: With dead ends: 1703 [2021-06-05 14:04:25,980 INFO L226 Difference]: Without dead ends: 1703 [2021-06-05 14:04:25,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-06-05 14:04:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1399. [2021-06-05 14:04:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.78826895565093) internal successors, (3898), 1398 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 3898 transitions. [2021-06-05 14:04:25,995 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 3898 transitions. Word has length 21 [2021-06-05 14:04:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:25,995 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 3898 transitions. [2021-06-05 14:04:25,995 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 14:04:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 3898 transitions. [2021-06-05 14:04:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:25,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:25,996 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:26,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15537,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:26,197 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:26,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:26,197 INFO L82 PathProgramCache]: Analyzing trace with hash -853668908, now seen corresponding path program 363 times [2021-06-05 14:04:26,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:26,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533454665] [2021-06-05 14:04:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:26,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:26,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533454665] [2021-06-05 14:04:26,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533454665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:26,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017396263] [2021-06-05 14:04:26,247 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 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 14:04:26,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:04:26,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:26,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017396263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:26,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:26,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:26,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830366610] [2021-06-05 14:04:26,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:26,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:26,315 INFO L87 Difference]: Start difference. First operand 1399 states and 3898 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:26,450 INFO L93 Difference]: Finished difference Result 1746 states and 4637 transitions. [2021-06-05 14:04:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:26,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:26,452 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 14:04:26,452 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 14:04:26,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 14:04:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1419. [2021-06-05 14:04:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.796191819464034) internal successors, (3965), 1418 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 3965 transitions. [2021-06-05 14:04:26,467 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 3965 transitions. Word has length 21 [2021-06-05 14:04:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:26,467 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 3965 transitions. [2021-06-05 14:04:26,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 3965 transitions. [2021-06-05 14:04:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:26,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:26,468 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:26,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15538 [2021-06-05 14:04:26,669 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash -230939083, now seen corresponding path program 364 times [2021-06-05 14:04:26,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:26,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260144601] [2021-06-05 14:04:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:26,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:26,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260144601] [2021-06-05 14:04:26,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260144601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:26,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962705652] [2021-06-05 14:04:26,721 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 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 14:04:26,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:26,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:26,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962705652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:26,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:26,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:26,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501566377] [2021-06-05 14:04:26,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:26,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:26,781 INFO L87 Difference]: Start difference. First operand 1419 states and 3965 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:26,910 INFO L93 Difference]: Finished difference Result 1714 states and 4627 transitions. [2021-06-05 14:04:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:26,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:26,912 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 14:04:26,912 INFO L226 Difference]: Without dead ends: 1710 [2021-06-05 14:04:26,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-05 14:04:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1352. [2021-06-05 14:04:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.7860843819393044) internal successors, (3764), 1351 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3764 transitions. [2021-06-05 14:04:26,926 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3764 transitions. Word has length 21 [2021-06-05 14:04:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:26,926 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 3764 transitions. [2021-06-05 14:04:26,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3764 transitions. [2021-06-05 14:04:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:26,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:26,927 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15539,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:27,127 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1277980144, now seen corresponding path program 365 times [2021-06-05 14:04:27,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028449063] [2021-06-05 14:04:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028449063] [2021-06-05 14:04:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028449063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152034035] [2021-06-05 14:04:27,178 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 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 14:04:27,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152034035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:27,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264989584] [2021-06-05 14:04:27,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:27,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:27,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:27,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:27,232 INFO L87 Difference]: Start difference. First operand 1352 states and 3764 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:27,340 INFO L93 Difference]: Finished difference Result 1892 states and 4939 transitions. [2021-06-05 14:04:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:04:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:27,343 INFO L225 Difference]: With dead ends: 1892 [2021-06-05 14:04:27,343 INFO L226 Difference]: Without dead ends: 1878 [2021-06-05 14:04:27,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-06-05 14:04:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1354. [2021-06-05 14:04:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.785661492978566) internal successors, (3769), 1353 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3769 transitions. [2021-06-05 14:04:27,357 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3769 transitions. Word has length 21 [2021-06-05 14:04:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:27,357 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 3769 transitions. [2021-06-05 14:04:27,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3769 transitions. [2021-06-05 14:04:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:27,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:27,358 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15540,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:27,558 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash -867405937, now seen corresponding path program 366 times [2021-06-05 14:04:27,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139187695] [2021-06-05 14:04:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139187695] [2021-06-05 14:04:27,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139187695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299897245] [2021-06-05 14:04:27,615 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 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 14:04:27,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:27,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:27,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299897245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:27,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493830991] [2021-06-05 14:04:27,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:27,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:27,674 INFO L87 Difference]: Start difference. First operand 1354 states and 3769 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:27,856 INFO L93 Difference]: Finished difference Result 1810 states and 4802 transitions. [2021-06-05 14:04:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:27,858 INFO L225 Difference]: With dead ends: 1810 [2021-06-05 14:04:27,858 INFO L226 Difference]: Without dead ends: 1810 [2021-06-05 14:04:27,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:04:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-06-05 14:04:27,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1323. [2021-06-05 14:04:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 2.793494704992436) internal successors, (3693), 1322 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3693 transitions. [2021-06-05 14:04:27,871 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3693 transitions. Word has length 21 [2021-06-05 14:04:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:27,871 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 3693 transitions. [2021-06-05 14:04:27,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3693 transitions. [2021-06-05 14:04:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:27,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:27,872 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:28,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15541 [2021-06-05 14:04:28,073 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash 940996534, now seen corresponding path program 367 times [2021-06-05 14:04:28,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:28,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947573686] [2021-06-05 14:04:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947573686] [2021-06-05 14:04:28,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947573686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483309729] [2021-06-05 14:04:28,113 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 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 14:04:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483309729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:28,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:28,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129736731] [2021-06-05 14:04:28,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:28,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:28,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:28,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:28,165 INFO L87 Difference]: Start difference. First operand 1323 states and 3693 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:28,243 INFO L93 Difference]: Finished difference Result 1696 states and 4444 transitions. [2021-06-05 14:04:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:04:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-05 14:04:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:28,244 INFO L225 Difference]: With dead ends: 1696 [2021-06-05 14:04:28,244 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 14:04:28,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:04:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 14:04:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1401. [2021-06-05 14:04:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.8235714285714284) internal successors, (3953), 1400 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3953 transitions. [2021-06-05 14:04:28,259 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3953 transitions. Word has length 21 [2021-06-05 14:04:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:28,259 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 3953 transitions. [2021-06-05 14:04:28,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3953 transitions. [2021-06-05 14:04:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:28,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:28,260 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:28,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15542,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:28,461 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1675804555, now seen corresponding path program 368 times [2021-06-05 14:04:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:28,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538196784] [2021-06-05 14:04:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:28,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538196784] [2021-06-05 14:04:28,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538196784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173017237] [2021-06-05 14:04:28,505 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 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 14:04:28,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173017237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:28,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:04:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123753289] [2021-06-05 14:04:28,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:28,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:28,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:28,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:28,553 INFO L87 Difference]: Start difference. First operand 1401 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:28,689 INFO L93 Difference]: Finished difference Result 1640 states and 4370 transitions. [2021-06-05 14:04:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:04:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-05 14:04:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:28,691 INFO L225 Difference]: With dead ends: 1640 [2021-06-05 14:04:28,691 INFO L226 Difference]: Without dead ends: 1636 [2021-06-05 14:04:28,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:28,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-06-05 14:04:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1419. [2021-06-05 14:04:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.8314527503526095) internal successors, (4015), 1418 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4015 transitions. [2021-06-05 14:04:28,706 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4015 transitions. Word has length 21 [2021-06-05 14:04:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:28,706 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4015 transitions. [2021-06-05 14:04:28,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4015 transitions. [2021-06-05 14:04:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:28,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:28,707 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:28,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15543,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:28,907 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1134729418, now seen corresponding path program 369 times [2021-06-05 14:04:28,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:28,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357348986] [2021-06-05 14:04:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:28,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357348986] [2021-06-05 14:04:28,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357348986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659055808] [2021-06-05 14:04:28,943 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 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 14:04:28,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:04:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:28,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659055808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:28,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:28,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548951107] [2021-06-05 14:04:28,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:28,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:28,994 INFO L87 Difference]: Start difference. First operand 1419 states and 4015 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 14:04:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:29,090 INFO L93 Difference]: Finished difference Result 1665 states and 4422 transitions. [2021-06-05 14:04:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:29,090 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 21 [2021-06-05 14:04:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:29,092 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 14:04:29,092 INFO L226 Difference]: Without dead ends: 1663 [2021-06-05 14:04:29,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-06-05 14:04:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1419. [2021-06-05 14:04:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.830042313117066) internal successors, (4013), 1418 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4013 transitions. [2021-06-05 14:04:29,106 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4013 transitions. Word has length 21 [2021-06-05 14:04:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:29,107 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4013 transitions. [2021-06-05 14:04:29,107 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 14:04:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4013 transitions. [2021-06-05 14:04:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:29,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:29,108 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:29,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15544 [2021-06-05 14:04:29,308 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1524213749, now seen corresponding path program 370 times [2021-06-05 14:04:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:29,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089850493] [2021-06-05 14:04:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:29,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089850493] [2021-06-05 14:04:29,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089850493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414735539] [2021-06-05 14:04:29,347 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 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 14:04:29,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:29,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414735539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:29,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:29,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998147833] [2021-06-05 14:04:29,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:29,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:29,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:29,400 INFO L87 Difference]: Start difference. First operand 1419 states and 4013 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 14:04:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:29,468 INFO L93 Difference]: Finished difference Result 1795 states and 4748 transitions. [2021-06-05 14:04:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:29,468 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 21 [2021-06-05 14:04:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:29,470 INFO L225 Difference]: With dead ends: 1795 [2021-06-05 14:04:29,470 INFO L226 Difference]: Without dead ends: 1795 [2021-06-05 14:04:29,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-06-05 14:04:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1431. [2021-06-05 14:04:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827972027972028) internal successors, (4044), 1430 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4044 transitions. [2021-06-05 14:04:29,485 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4044 transitions. Word has length 21 [2021-06-05 14:04:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:29,485 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4044 transitions. [2021-06-05 14:04:29,485 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 14:04:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4044 transitions. [2021-06-05 14:04:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:29,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:29,486 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:29,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15545 [2021-06-05 14:04:29,687 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash 18584182, now seen corresponding path program 371 times [2021-06-05 14:04:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:29,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520336606] [2021-06-05 14:04:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:29,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520336606] [2021-06-05 14:04:29,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520336606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024295565] [2021-06-05 14:04:29,739 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 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 14:04:29,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:29,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024295565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:29,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:29,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:29,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917987733] [2021-06-05 14:04:29,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:29,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:29,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:29,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:29,793 INFO L87 Difference]: Start difference. First operand 1431 states and 4044 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:29,921 INFO L93 Difference]: Finished difference Result 1934 states and 5102 transitions. [2021-06-05 14:04:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:29,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:29,923 INFO L225 Difference]: With dead ends: 1934 [2021-06-05 14:04:29,923 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 14:04:29,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 14:04:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1431. [2021-06-05 14:04:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827272727272727) internal successors, (4043), 1430 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4043 transitions. [2021-06-05 14:04:29,938 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4043 transitions. Word has length 21 [2021-06-05 14:04:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:29,938 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4043 transitions. [2021-06-05 14:04:29,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4043 transitions. [2021-06-05 14:04:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:29,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:29,940 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:30,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15546 [2021-06-05 14:04:30,140 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:30,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 429158389, now seen corresponding path program 372 times [2021-06-05 14:04:30,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:30,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923466197] [2021-06-05 14:04:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:30,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:30,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923466197] [2021-06-05 14:04:30,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923466197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:30,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362980873] [2021-06-05 14:04:30,194 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 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 14:04:30,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:30,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362980873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:30,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:30,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:30,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719111981] [2021-06-05 14:04:30,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:30,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:30,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:30,252 INFO L87 Difference]: Start difference. First operand 1431 states and 4043 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:30,412 INFO L93 Difference]: Finished difference Result 1818 states and 4976 transitions. [2021-06-05 14:04:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:30,414 INFO L225 Difference]: With dead ends: 1818 [2021-06-05 14:04:30,414 INFO L226 Difference]: Without dead ends: 1818 [2021-06-05 14:04:30,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:04:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-06-05 14:04:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1629. [2021-06-05 14:04:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.8316953316953315) internal successors, (4610), 1628 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 4610 transitions. [2021-06-05 14:04:30,430 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 4610 transitions. Word has length 21 [2021-06-05 14:04:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:30,430 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 4610 transitions. [2021-06-05 14:04:30,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 4610 transitions. [2021-06-05 14:04:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:30,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:30,432 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:30,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15547 [2021-06-05 14:04:30,632 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:30,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:30,632 INFO L82 PathProgramCache]: Analyzing trace with hash 186543602, now seen corresponding path program 373 times [2021-06-05 14:04:30,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:30,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069173807] [2021-06-05 14:04:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:30,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069173807] [2021-06-05 14:04:30,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069173807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:30,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151785674] [2021-06-05 14:04:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151785674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:30,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:30,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:30,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909873105] [2021-06-05 14:04:30,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:30,719 INFO L87 Difference]: Start difference. First operand 1629 states and 4610 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 14:04:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:30,771 INFO L93 Difference]: Finished difference Result 2167 states and 5841 transitions. [2021-06-05 14:04:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:30,772 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 21 [2021-06-05 14:04:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:30,773 INFO L225 Difference]: With dead ends: 2167 [2021-06-05 14:04:30,773 INFO L226 Difference]: Without dead ends: 2167 [2021-06-05 14:04:30,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-06-05 14:04:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1854. [2021-06-05 14:04:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 2.870480302212628) internal successors, (5319), 1853 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 5319 transitions. [2021-06-05 14:04:30,792 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 5319 transitions. Word has length 21 [2021-06-05 14:04:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:30,792 INFO L482 AbstractCegarLoop]: Abstraction has 1854 states and 5319 transitions. [2021-06-05 14:04:30,792 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 14:04:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 5319 transitions. [2021-06-05 14:04:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:30,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:30,794 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:30,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15548 [2021-06-05 14:04:30,994 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -590605997, now seen corresponding path program 374 times [2021-06-05 14:04:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677267202] [2021-06-05 14:04:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:31,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677267202] [2021-06-05 14:04:31,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677267202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883136443] [2021-06-05 14:04:31,037 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 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 14:04:31,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883136443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:31,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:31,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934626999] [2021-06-05 14:04:31,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:31,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:31,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:31,087 INFO L87 Difference]: Start difference. First operand 1854 states and 5319 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 14:04:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:31,200 INFO L93 Difference]: Finished difference Result 2069 states and 5690 transitions. [2021-06-05 14:04:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:31,201 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 21 [2021-06-05 14:04:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:31,202 INFO L225 Difference]: With dead ends: 2069 [2021-06-05 14:04:31,202 INFO L226 Difference]: Without dead ends: 2067 [2021-06-05 14:04:31,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-05 14:04:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1876. [2021-06-05 14:04:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8789333333333333) internal successors, (5398), 1875 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5398 transitions. [2021-06-05 14:04:31,221 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5398 transitions. Word has length 21 [2021-06-05 14:04:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:31,221 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5398 transitions. [2021-06-05 14:04:31,221 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 14:04:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5398 transitions. [2021-06-05 14:04:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:31,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:31,223 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:31,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15549,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:31,427 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1538935856, now seen corresponding path program 375 times [2021-06-05 14:04:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:31,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872009938] [2021-06-05 14:04:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872009938] [2021-06-05 14:04:31,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872009938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416850520] [2021-06-05 14:04:31,467 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 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 14:04:31,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:31,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:31,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416850520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:31,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:31,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422250637] [2021-06-05 14:04:31,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:31,523 INFO L87 Difference]: Start difference. First operand 1876 states and 5398 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 14:04:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:31,637 INFO L93 Difference]: Finished difference Result 2160 states and 5868 transitions. [2021-06-05 14:04:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:31,637 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 21 [2021-06-05 14:04:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:31,639 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 14:04:31,639 INFO L226 Difference]: Without dead ends: 2158 [2021-06-05 14:04:31,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-05 14:04:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1876. [2021-06-05 14:04:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8784) internal successors, (5397), 1875 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5397 transitions. [2021-06-05 14:04:31,683 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5397 transitions. Word has length 21 [2021-06-05 14:04:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:31,684 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5397 transitions. [2021-06-05 14:04:31,684 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 14:04:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5397 transitions. [2021-06-05 14:04:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:31,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:31,687 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:31,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15550,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:31,889 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:31,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1120007311, now seen corresponding path program 376 times [2021-06-05 14:04:31,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:31,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846046442] [2021-06-05 14:04:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846046442] [2021-06-05 14:04:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846046442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859460266] [2021-06-05 14:04:31,930 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 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 14:04:31,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:31,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:31,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859460266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:31,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:31,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:31,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643141309] [2021-06-05 14:04:31,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:31,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:31,983 INFO L87 Difference]: Start difference. First operand 1876 states and 5397 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 14:04:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:32,060 INFO L93 Difference]: Finished difference Result 2164 states and 5944 transitions. [2021-06-05 14:04:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:04:32,060 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 21 [2021-06-05 14:04:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:32,062 INFO L225 Difference]: With dead ends: 2164 [2021-06-05 14:04:32,062 INFO L226 Difference]: Without dead ends: 2164 [2021-06-05 14:04:32,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-06-05 14:04:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1880. [2021-06-05 14:04:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.8786588610963277) internal successors, (5409), 1879 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5409 transitions. [2021-06-05 14:04:32,082 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5409 transitions. Word has length 21 [2021-06-05 14:04:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:32,082 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 5409 transitions. [2021-06-05 14:04:32,083 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 14:04:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5409 transitions. [2021-06-05 14:04:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:32,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:32,084 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:32,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15551,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:32,285 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash -49530860, now seen corresponding path program 377 times [2021-06-05 14:04:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:32,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359582047] [2021-06-05 14:04:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:32,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:32,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359582047] [2021-06-05 14:04:32,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359582047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300946867] [2021-06-05 14:04:32,321 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 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 14:04:32,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:32,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:32,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300946867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:32,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415191127] [2021-06-05 14:04:32,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:32,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:32,371 INFO L87 Difference]: Start difference. First operand 1880 states and 5409 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 14:04:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:32,471 INFO L93 Difference]: Finished difference Result 2226 states and 6044 transitions. [2021-06-05 14:04:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:32,471 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 21 [2021-06-05 14:04:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:32,473 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 14:04:32,473 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 14:04:32,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 14:04:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1880. [2021-06-05 14:04:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.87812666311868) internal successors, (5408), 1879 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5408 transitions. [2021-06-05 14:04:32,492 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5408 transitions. Word has length 21 [2021-06-05 14:04:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:32,492 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 5408 transitions. [2021-06-05 14:04:32,492 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 14:04:32,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5408 transitions. [2021-06-05 14:04:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:32,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:32,494 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:32,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15552,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:32,694 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash -940852491, now seen corresponding path program 378 times [2021-06-05 14:04:32,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:32,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329488916] [2021-06-05 14:04:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:32,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:32,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329488916] [2021-06-05 14:04:32,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329488916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364571331] [2021-06-05 14:04:32,745 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 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 14:04:32,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:04:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:32,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364571331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:32,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:32,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:32,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175241926] [2021-06-05 14:04:32,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:32,800 INFO L87 Difference]: Start difference. First operand 1880 states and 5408 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 14:04:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:32,902 INFO L93 Difference]: Finished difference Result 2131 states and 5923 transitions. [2021-06-05 14:04:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:04:32,902 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 21 [2021-06-05 14:04:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:32,904 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 14:04:32,904 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 14:04:32,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 14:04:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1896. [2021-06-05 14:04:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.880738786279683) internal successors, (5459), 1895 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5459 transitions. [2021-06-05 14:04:32,922 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5459 transitions. Word has length 21 [2021-06-05 14:04:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:32,922 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 5459 transitions. [2021-06-05 14:04:32,922 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 14:04:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5459 transitions. [2021-06-05 14:04:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:32,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:32,924 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:33,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15553,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:33,124 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:33,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1122616240, now seen corresponding path program 379 times [2021-06-05 14:04:33,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:33,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139936995] [2021-06-05 14:04:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:33,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139936995] [2021-06-05 14:04:33,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139936995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118510236] [2021-06-05 14:04:33,160 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 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 14:04:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:33,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118510236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:33,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:33,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865956327] [2021-06-05 14:04:33,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:33,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:33,222 INFO L87 Difference]: Start difference. First operand 1896 states and 5459 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:33,330 INFO L93 Difference]: Finished difference Result 2262 states and 6134 transitions. [2021-06-05 14:04:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-05 14:04:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:33,333 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 14:04:33,333 INFO L226 Difference]: Without dead ends: 2256 [2021-06-05 14:04:33,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-06-05 14:04:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1915. [2021-06-05 14:04:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.8876698014629048) internal successors, (5527), 1914 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5527 transitions. [2021-06-05 14:04:33,352 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5527 transitions. Word has length 21 [2021-06-05 14:04:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:33,352 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5527 transitions. [2021-06-05 14:04:33,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5527 transitions. [2021-06-05 14:04:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:33,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:33,353 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:33,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15554,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:33,554 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:33,554 INFO L82 PathProgramCache]: Analyzing trace with hash -402996913, now seen corresponding path program 380 times [2021-06-05 14:04:33,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:33,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91721858] [2021-06-05 14:04:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:33,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91721858] [2021-06-05 14:04:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91721858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36429411] [2021-06-05 14:04:33,591 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 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 14:04:33,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:33,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:33,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36429411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:33,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:33,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:33,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637738179] [2021-06-05 14:04:33,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:33,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:33,649 INFO L87 Difference]: Start difference. First operand 1915 states and 5527 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:33,768 INFO L93 Difference]: Finished difference Result 2204 states and 6118 transitions. [2021-06-05 14:04:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-05 14:04:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:33,770 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 14:04:33,770 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 14:04:33,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 14:04:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1917. [2021-06-05 14:04:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.887787056367432) internal successors, (5533), 1916 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 5533 transitions. [2021-06-05 14:04:33,791 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 5533 transitions. Word has length 21 [2021-06-05 14:04:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:33,791 INFO L482 AbstractCegarLoop]: Abstraction has 1917 states and 5533 transitions. [2021-06-05 14:04:33,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 5533 transitions. [2021-06-05 14:04:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:33,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:33,793 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:33,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15555 [2021-06-05 14:04:33,993 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash -909343179, now seen corresponding path program 381 times [2021-06-05 14:04:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:33,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506798575] [2021-06-05 14:04:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:34,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506798575] [2021-06-05 14:04:34,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506798575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047940772] [2021-06-05 14:04:34,032 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 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 14:04:34,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:34,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:34,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047940772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:34,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:04:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660633595] [2021-06-05 14:04:34,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:04:34,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:04:34,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:04:34,089 INFO L87 Difference]: Start difference. First operand 1917 states and 5533 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:34,209 INFO L93 Difference]: Finished difference Result 2248 states and 6327 transitions. [2021-06-05 14:04:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-06-05 14:04:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:34,211 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 14:04:34,211 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 14:04:34,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:04:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 14:04:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2054. [2021-06-05 14:04:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.895762299074525) internal successors, (5945), 2053 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5945 transitions. [2021-06-05 14:04:34,231 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5945 transitions. Word has length 21 [2021-06-05 14:04:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:34,231 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 5945 transitions. [2021-06-05 14:04:34,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 14:04:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5945 transitions. [2021-06-05 14:04:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:34,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:34,233 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:34,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15556 [2021-06-05 14:04:34,434 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash -471423792, now seen corresponding path program 382 times [2021-06-05 14:04:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:34,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347928121] [2021-06-05 14:04:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:34,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:34,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347928121] [2021-06-05 14:04:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347928121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331576522] [2021-06-05 14:04:34,478 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 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 14:04:34,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:34,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331576522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:34,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375627938] [2021-06-05 14:04:34,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:34,531 INFO L87 Difference]: Start difference. First operand 2054 states and 5945 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:34,650 INFO L93 Difference]: Finished difference Result 2927 states and 7947 transitions. [2021-06-05 14:04:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-05 14:04:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:34,652 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 14:04:34,652 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 14:04:34,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 14:04:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2066. [2021-06-05 14:04:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8949152542372882) internal successors, (5978), 2065 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5978 transitions. [2021-06-05 14:04:34,675 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5978 transitions. Word has length 21 [2021-06-05 14:04:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:34,675 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5978 transitions. [2021-06-05 14:04:34,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5978 transitions. [2021-06-05 14:04:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:34,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:34,677 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15557 [2021-06-05 14:04:34,877 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash 573791759, now seen corresponding path program 383 times [2021-06-05 14:04:34,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:34,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55181680] [2021-06-05 14:04:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:34,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:34,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55181680] [2021-06-05 14:04:34,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55181680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259882351] [2021-06-05 14:04:34,922 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 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 14:04:34,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:04:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:34,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259882351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:34,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:34,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:34,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287398857] [2021-06-05 14:04:34,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:34,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:34,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:34,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:34,978 INFO L87 Difference]: Start difference. First operand 2066 states and 5978 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:35,086 INFO L93 Difference]: Finished difference Result 2220 states and 6263 transitions. [2021-06-05 14:04:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:35,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-05 14:04:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:35,088 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 14:04:35,088 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 14:04:35,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 14:04:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2055. [2021-06-05 14:04:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8938656280428434) internal successors, (5944), 2054 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5944 transitions. [2021-06-05 14:04:35,108 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5944 transitions. Word has length 21 [2021-06-05 14:04:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:35,109 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5944 transitions. [2021-06-05 14:04:35,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5944 transitions. [2021-06-05 14:04:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:35,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:35,110 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:35,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15558 [2021-06-05 14:04:35,311 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -693665419, now seen corresponding path program 384 times [2021-06-05 14:04:35,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:35,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915308685] [2021-06-05 14:04:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:35,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:35,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915308685] [2021-06-05 14:04:35,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915308685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296416388] [2021-06-05 14:04:35,359 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 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 14:04:35,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:35,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:35,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296416388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:35,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:04:35,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239898640] [2021-06-05 14:04:35,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:04:35,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:35,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:04:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:04:35,416 INFO L87 Difference]: Start difference. First operand 2055 states and 5944 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:35,501 INFO L93 Difference]: Finished difference Result 2405 states and 6839 transitions. [2021-06-05 14:04:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:04:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 21 [2021-06-05 14:04:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:35,503 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 14:04:35,503 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 14:04:35,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:04:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 14:04:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2231. [2021-06-05 14:04:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.8937219730941703) internal successors, (6453), 2230 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6453 transitions. [2021-06-05 14:04:35,524 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6453 transitions. Word has length 21 [2021-06-05 14:04:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:35,524 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6453 transitions. [2021-06-05 14:04:35,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 14:04:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6453 transitions. [2021-06-05 14:04:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:35,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:35,526 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:35,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15559 [2021-06-05 14:04:35,727 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:35,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1740706480, now seen corresponding path program 385 times [2021-06-05 14:04:35,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:35,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41990214] [2021-06-05 14:04:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:35,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41990214] [2021-06-05 14:04:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41990214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274754083] [2021-06-05 14:04:35,786 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 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 14:04:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274754083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:35,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:35,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:35,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112321628] [2021-06-05 14:04:35,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:35,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:35,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:35,838 INFO L87 Difference]: Start difference. First operand 2231 states and 6453 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:35,971 INFO L93 Difference]: Finished difference Result 3084 states and 8355 transitions. [2021-06-05 14:04:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:35,974 INFO L225 Difference]: With dead ends: 3084 [2021-06-05 14:04:35,974 INFO L226 Difference]: Without dead ends: 3070 [2021-06-05 14:04:35,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-05 14:04:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2241. [2021-06-05 14:04:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8924107142857145) internal successors, (6479), 2240 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6479 transitions. [2021-06-05 14:04:35,997 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6479 transitions. Word has length 21 [2021-06-05 14:04:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:35,997 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 6479 transitions. [2021-06-05 14:04:35,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6479 transitions. [2021-06-05 14:04:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:35,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:35,999 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:36,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15560 [2021-06-05 14:04:36,200 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:36,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1330132273, now seen corresponding path program 386 times [2021-06-05 14:04:36,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:36,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218450127] [2021-06-05 14:04:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218450127] [2021-06-05 14:04:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218450127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619417239] [2021-06-05 14:04:36,255 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 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 14:04:36,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:36,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619417239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:36,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:36,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266113969] [2021-06-05 14:04:36,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:36,312 INFO L87 Difference]: Start difference. First operand 2241 states and 6479 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:36,442 INFO L93 Difference]: Finished difference Result 2484 states and 7025 transitions. [2021-06-05 14:04:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:36,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:36,444 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 14:04:36,444 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 14:04:36,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:36,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 14:04:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2245. [2021-06-05 14:04:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 2.892602495543672) internal successors, (6491), 2244 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 6491 transitions. [2021-06-05 14:04:36,466 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 6491 transitions. Word has length 21 [2021-06-05 14:04:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:36,466 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 6491 transitions. [2021-06-05 14:04:36,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 6491 transitions. [2021-06-05 14:04:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:36,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:36,468 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:36,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15561,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:36,669 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2009452908, now seen corresponding path program 387 times [2021-06-05 14:04:36,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:36,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142718600] [2021-06-05 14:04:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:36,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142718600] [2021-06-05 14:04:36,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142718600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040812553] [2021-06-05 14:04:36,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:04:36,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:36,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:36,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:36,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040812553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:36,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:36,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:36,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569500960] [2021-06-05 14:04:36,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:36,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:36,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:36,785 INFO L87 Difference]: Start difference. First operand 2245 states and 6491 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:36,854 INFO L93 Difference]: Finished difference Result 2777 states and 7639 transitions. [2021-06-05 14:04:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:04:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:36,857 INFO L225 Difference]: With dead ends: 2777 [2021-06-05 14:04:36,857 INFO L226 Difference]: Without dead ends: 2761 [2021-06-05 14:04:36,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:04:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-06-05 14:04:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2243. [2021-06-05 14:04:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 2.893398751115076) internal successors, (6487), 2242 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 6487 transitions. [2021-06-05 14:04:36,879 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 6487 transitions. Word has length 21 [2021-06-05 14:04:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:36,879 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 6487 transitions. [2021-06-05 14:04:36,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 6487 transitions. [2021-06-05 14:04:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:04:36,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:36,881 INFO L521 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:37,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15562,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:37,081 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash 414231733, now seen corresponding path program 388 times [2021-06-05 14:04:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:37,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460571129] [2021-06-05 14:04:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:37,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460571129] [2021-06-05 14:04:37,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460571129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20558265] [2021-06-05 14:04:37,152 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 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 14:04:37,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:37,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:04:37,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20558265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:37,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:04:37,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18241339] [2021-06-05 14:04:37,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:37,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:37,208 INFO L87 Difference]: Start difference. First operand 2243 states and 6487 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:37,397 INFO L93 Difference]: Finished difference Result 2725 states and 7700 transitions. [2021-06-05 14:04:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:04:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 21 [2021-06-05 14:04:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:37,399 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 14:04:37,399 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 14:04:37,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:04:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 14:04:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2301. [2021-06-05 14:04:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.893478260869565) internal successors, (6655), 2300 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6655 transitions. [2021-06-05 14:04:37,423 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6655 transitions. Word has length 21 [2021-06-05 14:04:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:37,423 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 6655 transitions. [2021-06-05 14:04:37,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) 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 14:04:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6655 transitions. [2021-06-05 14:04:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:04:37,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:37,425 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:37,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15563,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:37,626 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1134083623, now seen corresponding path program 389 times [2021-06-05 14:04:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:37,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334359656] [2021-06-05 14:04:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:37,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334359656] [2021-06-05 14:04:37,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334359656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596620210] [2021-06-05 14:04:37,764 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 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 14:04:37,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:37,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:04:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:38,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:38,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:04:39,240 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 420 [2021-06-05 14:04:39,427 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 420 [2021-06-05 14:04:39,672 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 431 [2021-06-05 14:04:40,075 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 466 [2021-06-05 14:04:40,281 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 277 [2021-06-05 14:04:40,461 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 288 [2021-06-05 14:04:41,157 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 257 [2021-06-05 14:04:41,880 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 279 [2021-06-05 14:04:42,121 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 428 [2021-06-05 14:04:43,154 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 302 [2021-06-05 14:04:43,608 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 633 [2021-06-05 14:04:44,183 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 1269 DAG size of output: 805 [2021-06-05 14:04:44,737 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 1269 DAG size of output: 805 [2021-06-05 14:04:45,369 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 1274 DAG size of output: 810 [2021-06-05 14:04:45,906 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 898 [2021-06-05 14:04:46,589 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 286 [2021-06-05 14:04:46,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:46,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:46,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:46,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:04:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596620210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:46,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:04:46,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785915649] [2021-06-05 14:04:46,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:04:46,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:04:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:04:46,935 INFO L87 Difference]: Start difference. First operand 2301 states and 6655 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:04:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:47,299 INFO L93 Difference]: Finished difference Result 2401 states and 6850 transitions. [2021-06-05 14:04:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:04:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:04:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:47,302 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 14:04:47,302 INFO L226 Difference]: Without dead ends: 2362 [2021-06-05 14:04:47,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:04:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-06-05 14:04:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2321. [2021-06-05 14:04:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.8922413793103448) internal successors, (6710), 2320 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 6710 transitions. [2021-06-05 14:04:47,322 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 6710 transitions. Word has length 22 [2021-06-05 14:04:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:47,322 INFO L482 AbstractCegarLoop]: Abstraction has 2321 states and 6710 transitions. [2021-06-05 14:04:47,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:04:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 6710 transitions. [2021-06-05 14:04:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:04:47,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:47,324 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:47,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15564,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:47,525 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1610689749, now seen corresponding path program 390 times [2021-06-05 14:04:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:47,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602982021] [2021-06-05 14:04:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:47,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602982021] [2021-06-05 14:04:47,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602982021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376484615] [2021-06-05 14:04:47,614 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 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 14:04:47,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:47,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:47,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:04:47,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:48,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:48,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:04:49,357 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 202 [2021-06-05 14:04:49,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:49,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:49,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:49,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:04:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376484615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:49,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:04:49,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034804606] [2021-06-05 14:04:49,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:04:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:49,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:04:49,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:49,673 INFO L87 Difference]: Start difference. First operand 2321 states and 6710 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:04:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:50,001 INFO L93 Difference]: Finished difference Result 2430 states and 6936 transitions. [2021-06-05 14:04:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:04:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:04:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:50,004 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 14:04:50,004 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 14:04:50,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:04:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 14:04:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2342. [2021-06-05 14:04:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-06-05 14:04:50,025 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-06-05 14:04:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-06-05 14:04:50,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:04:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-06-05 14:04:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:04:50,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:50,027 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16415,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:50,228 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash -751815219, now seen corresponding path program 391 times [2021-06-05 14:04:50,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448838462] [2021-06-05 14:04:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:50,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448838462] [2021-06-05 14:04:50,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448838462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314315502] [2021-06-05 14:04:50,320 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 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 14:04:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:50,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:04:51,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:51,800 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:04:51,801 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:04:51,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:04:53,047 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 266 [2021-06-05 14:04:53,218 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 276 [2021-06-05 14:04:53,440 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 301 [2021-06-05 14:04:53,661 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 301 [2021-06-05 14:04:53,903 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 300 [2021-06-05 14:04:54,179 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 335 [2021-06-05 14:04:55,266 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 217 [2021-06-05 14:04:55,459 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 218 [2021-06-05 14:04:55,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:04:55,733 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:04:55,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:55,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:04:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:55,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314315502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:55,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:04:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66226373] [2021-06-05 14:04:55,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:04:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:04:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:55,760 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:04:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:56,172 INFO L93 Difference]: Finished difference Result 2452 states and 6986 transitions. [2021-06-05 14:04:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:04:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:04:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:56,174 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 14:04:56,174 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 14:04:56,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:04:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 14:04:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2342. [2021-06-05 14:04:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-06-05 14:04:56,196 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-06-05 14:04:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:56,196 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-06-05 14:04:56,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:04:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-06-05 14:04:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:04:56,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:56,198 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:56,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16661 [2021-06-05 14:04:56,398 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1241823813, now seen corresponding path program 392 times [2021-06-05 14:04:56,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:56,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886320301] [2021-06-05 14:04:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:56,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886320301] [2021-06-05 14:04:56,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886320301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636464270] [2021-06-05 14:04:56,486 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 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 14:04:56,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:56,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:56,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:04:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:56,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:04:57,554 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 302 [2021-06-05 14:04:57,674 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 302 [2021-06-05 14:04:57,823 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 313 [2021-06-05 14:04:58,011 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 338 [2021-06-05 14:04:58,793 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 303 [2021-06-05 14:04:58,972 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 330 [2021-06-05 14:04:59,208 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 442 [2021-06-05 14:04:59,443 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 442 [2021-06-05 14:04:59,705 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 447 [2021-06-05 14:04:59,914 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 369 [2021-06-05 14:05:00,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:00,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:00,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:00,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:05:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636464270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:00,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:05:00,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840966812] [2021-06-05 14:05:00,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:05:00,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:00,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:05:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:00,742 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:01,124 INFO L93 Difference]: Finished difference Result 2475 states and 7097 transitions. [2021-06-05 14:05:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:05:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:01,127 INFO L225 Difference]: With dead ends: 2475 [2021-06-05 14:05:01,127 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 14:05:01,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:05:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 14:05:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2381. [2021-06-05 14:05:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9063025210084033) internal successors, (6917), 2380 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6917 transitions. [2021-06-05 14:05:01,148 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6917 transitions. Word has length 22 [2021-06-05 14:05:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:01,148 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 6917 transitions. [2021-06-05 14:05:01,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6917 transitions. [2021-06-05 14:05:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:01,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:01,150 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:01,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17243 [2021-06-05 14:05:01,351 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -382949283, now seen corresponding path program 393 times [2021-06-05 14:05:01,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:01,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100845548] [2021-06-05 14:05:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:01,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:01,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100845548] [2021-06-05 14:05:01,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100845548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654616215] [2021-06-05 14:05:01,438 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 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 14:05:01,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:05:01,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:01,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:01,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:01,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:02,185 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 175 [2021-06-05 14:05:03,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:03,389 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:03,389 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:03,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:05:04,043 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 267 [2021-06-05 14:05:04,932 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 209 [2021-06-05 14:05:05,128 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 260 [2021-06-05 14:05:05,419 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 351 [2021-06-05 14:05:05,735 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 351 [2021-06-05 14:05:06,043 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 345 [2021-06-05 14:05:06,160 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 251 [2021-06-05 14:05:06,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:06,906 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:05:06,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:06,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:05:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654616215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:05:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092115507] [2021-06-05 14:05:06,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:05:06,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:05:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:06,932 INFO L87 Difference]: Start difference. First operand 2381 states and 6917 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:07,282 INFO L93 Difference]: Finished difference Result 2516 states and 7177 transitions. [2021-06-05 14:05:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:05:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:05:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:07,285 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 14:05:07,285 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 14:05:07,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:05:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 14:05:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2379. [2021-06-05 14:05:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 2.904541631623213) internal successors, (6907), 2378 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 6907 transitions. [2021-06-05 14:05:07,307 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 6907 transitions. Word has length 22 [2021-06-05 14:05:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:07,307 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 6907 transitions. [2021-06-05 14:05:07,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 6907 transitions. [2021-06-05 14:05:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:07,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:07,309 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:07,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17736,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:07,510 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:07,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1327664025, now seen corresponding path program 394 times [2021-06-05 14:05:07,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:07,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624490352] [2021-06-05 14:05:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:07,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:07,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624490352] [2021-06-05 14:05:07,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624490352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:07,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308083597] [2021-06-05 14:05:07,599 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 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 14:05:07,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:07,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:07,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:07,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:07,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:07,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:08,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:08,664 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:08,664 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:05:09,553 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 239 [2021-06-05 14:05:09,702 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-06-05 14:05:09,852 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-06-05 14:05:10,040 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 252 [2021-06-05 14:05:10,205 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 238 [2021-06-05 14:05:10,452 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 170 [2021-06-05 14:05:11,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:11,215 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:05:11,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:11,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:05:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308083597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:11,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:11,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:05:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990510839] [2021-06-05 14:05:11,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:05:11,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:05:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:11,240 INFO L87 Difference]: Start difference. First operand 2379 states and 6907 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:11,708 INFO L93 Difference]: Finished difference Result 2452 states and 7057 transitions. [2021-06-05 14:05:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:05:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:05:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:11,710 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 14:05:11,710 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 14:05:11,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:05:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 14:05:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2381. [2021-06-05 14:05:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9046218487394957) internal successors, (6913), 2380 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6913 transitions. [2021-06-05 14:05:11,732 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6913 transitions. Word has length 22 [2021-06-05 14:05:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:11,732 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 6913 transitions. [2021-06-05 14:05:11,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6913 transitions. [2021-06-05 14:05:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:11,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:11,734 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:11,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18247 [2021-06-05 14:05:11,934 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1415476527, now seen corresponding path program 395 times [2021-06-05 14:05:11,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:11,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587672232] [2021-06-05 14:05:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:05:12,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587672232] [2021-06-05 14:05:12,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587672232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296801195] [2021-06-05 14:05:12,011 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 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 14:05:12,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:05:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:12,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:12,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:12,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:13,749 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 250 [2021-06-05 14:05:14,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:14,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:14,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:14,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:05:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296801195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:14,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 14:05:14,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632011023] [2021-06-05 14:05:14,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 14:05:14,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:14,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 14:05:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:05:14,570 INFO L87 Difference]: Start difference. First operand 2381 states and 6913 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) 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 14:05:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:14,861 INFO L93 Difference]: Finished difference Result 2422 states and 6975 transitions. [2021-06-05 14:05:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:05:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) 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 22 [2021-06-05 14:05:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:14,863 INFO L225 Difference]: With dead ends: 2422 [2021-06-05 14:05:14,863 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 14:05:14,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:05:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 14:05:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-06-05 14:05:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.903781512605042) internal successors, (6911), 2380 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6911 transitions. [2021-06-05 14:05:14,885 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6911 transitions. Word has length 22 [2021-06-05 14:05:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:14,885 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 6911 transitions. [2021-06-05 14:05:14,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) 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 14:05:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6911 transitions. [2021-06-05 14:05:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:14,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:14,887 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:15,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18580,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:15,087 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:15,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash -660249425, now seen corresponding path program 396 times [2021-06-05 14:05:15,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:15,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516504331] [2021-06-05 14:05:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:15,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:15,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516504331] [2021-06-05 14:05:15,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516504331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:15,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078996531] [2021-06-05 14:05:15,174 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 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 14:05:15,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:05:15,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:15,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:15,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:16,890 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 179 [2021-06-05 14:05:17,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:17,539 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:17,539 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:17,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:05:19,164 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 296 [2021-06-05 14:05:19,437 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 329 [2021-06-05 14:05:19,727 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 338 [2021-06-05 14:05:20,105 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 359 [2021-06-05 14:05:20,603 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 408 [2021-06-05 14:05:21,117 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 408 [2021-06-05 14:05:21,666 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 406 [2021-06-05 14:05:22,315 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 475 [2021-06-05 14:05:22,991 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 274 [2021-06-05 14:05:23,417 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 227 [2021-06-05 14:05:23,539 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 252 [2021-06-05 14:05:23,659 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 252 [2021-06-05 14:05:23,788 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 241 [2021-06-05 14:05:23,946 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 259 [2021-06-05 14:05:24,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:24,307 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:05:24,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:24,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:05:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:24,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078996531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:24,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:24,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:05:24,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969872577] [2021-06-05 14:05:24,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:05:24,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:24,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:05:24,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:24,334 INFO L87 Difference]: Start difference. First operand 2381 states and 6911 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:24,835 INFO L93 Difference]: Finished difference Result 2517 states and 7175 transitions. [2021-06-05 14:05:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:05:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:05:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:24,838 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 14:05:24,838 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 14:05:24,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:05:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 14:05:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2380. [2021-06-05 14:05:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.903741067675494) internal successors, (6908), 2379 states have internal predecessors, (6908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6908 transitions. [2021-06-05 14:05:24,860 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6908 transitions. Word has length 22 [2021-06-05 14:05:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:24,860 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 6908 transitions. [2021-06-05 14:05:24,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6908 transitions. [2021-06-05 14:05:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:24,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:24,862 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:25,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18835,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:25,062 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085611, now seen corresponding path program 397 times [2021-06-05 14:05:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:25,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383459874] [2021-06-05 14:05:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:25,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383459874] [2021-06-05 14:05:25,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383459874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520615076] [2021-06-05 14:05:25,151 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 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 14:05:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:25,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:25,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:25,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:25,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:26,703 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 283 [2021-06-05 14:05:27,141 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 362 [2021-06-05 14:05:28,196 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 267 [2021-06-05 14:05:28,618 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 358 [2021-06-05 14:05:28,913 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 483 [2021-06-05 14:05:29,472 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 686 [2021-06-05 14:05:30,085 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 1075 DAG size of output: 703 [2021-06-05 14:05:30,677 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 1075 DAG size of output: 703 [2021-06-05 14:05:31,345 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 708 [2021-06-05 14:05:31,862 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 696 [2021-06-05 14:05:32,430 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 324 [2021-06-05 14:05:33,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:33,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:33,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:33,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:05:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:33,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520615076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:33,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:33,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:05:33,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329875148] [2021-06-05 14:05:33,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:05:33,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:33,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:05:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:33,300 INFO L87 Difference]: Start difference. First operand 2380 states and 6908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:33,653 INFO L93 Difference]: Finished difference Result 2527 states and 7269 transitions. [2021-06-05 14:05:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:05:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:33,656 INFO L225 Difference]: With dead ends: 2527 [2021-06-05 14:05:33,656 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 14:05:33,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:05:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 14:05:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2429. [2021-06-05 14:05:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 2.915156507413509) internal successors, (7078), 2428 states have internal predecessors, (7078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7078 transitions. [2021-06-05 14:05:33,679 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7078 transitions. Word has length 22 [2021-06-05 14:05:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:33,679 INFO L482 AbstractCegarLoop]: Abstraction has 2429 states and 7078 transitions. [2021-06-05 14:05:33,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7078 transitions. [2021-06-05 14:05:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:33,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:33,681 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:33,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19485 [2021-06-05 14:05:33,882 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1833007155, now seen corresponding path program 398 times [2021-06-05 14:05:33,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:33,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749684263] [2021-06-05 14:05:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749684263] [2021-06-05 14:05:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749684263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379113972] [2021-06-05 14:05:33,970 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 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 14:05:33,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:33,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:34,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:36,280 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 295 [2021-06-05 14:05:36,447 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 295 [2021-06-05 14:05:36,676 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 313 [2021-06-05 14:05:37,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:37,476 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:37,477 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:37,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:05:38,689 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 227 [2021-06-05 14:05:39,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:39,026 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:05:39,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:39,027 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:05:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:39,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379113972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:39,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:39,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:05:39,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964724729] [2021-06-05 14:05:39,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:05:39,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:05:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:39,053 INFO L87 Difference]: Start difference. First operand 2429 states and 7078 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:39,651 INFO L93 Difference]: Finished difference Result 2609 states and 7439 transitions. [2021-06-05 14:05:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:05:39,651 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:05:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:39,654 INFO L225 Difference]: With dead ends: 2609 [2021-06-05 14:05:39,654 INFO L226 Difference]: Without dead ends: 2583 [2021-06-05 14:05:39,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:05:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-06-05 14:05:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2431. [2021-06-05 14:05:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 2.914814814814815) internal successors, (7083), 2430 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 7083 transitions. [2021-06-05 14:05:39,677 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 7083 transitions. Word has length 22 [2021-06-05 14:05:39,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:39,677 INFO L482 AbstractCegarLoop]: Abstraction has 2431 states and 7083 transitions. [2021-06-05 14:05:39,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:05:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 7083 transitions. [2021-06-05 14:05:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:39,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:39,679 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:39,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20340,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:39,880 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:39,880 INFO L82 PathProgramCache]: Analyzing trace with hash -122393847, now seen corresponding path program 399 times [2021-06-05 14:05:39,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:39,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878788809] [2021-06-05 14:05:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:39,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878788809] [2021-06-05 14:05:39,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878788809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124058657] [2021-06-05 14:05:39,979 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 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 14:05:40,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:05:40,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:40,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:40,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:40,863 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 280 [2021-06-05 14:05:41,087 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 291 [2021-06-05 14:05:41,263 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 353 [2021-06-05 14:05:42,483 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 268 [2021-06-05 14:05:42,721 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 388 [2021-06-05 14:05:42,935 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 388 [2021-06-05 14:05:43,173 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 669 DAG size of output: 395 [2021-06-05 14:05:43,384 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 372 [2021-06-05 14:05:44,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:44,383 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:44,383 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:44,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:05:45,053 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 272 [2021-06-05 14:05:46,021 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 255 [2021-06-05 14:05:46,207 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 273 [2021-06-05 14:05:46,327 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 215 [2021-06-05 14:05:46,437 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 233 [2021-06-05 14:05:47,677 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 271 [2021-06-05 14:05:47,873 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 326 [2021-06-05 14:05:48,287 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 471 [2021-06-05 14:05:48,815 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 926 DAG size of output: 538 [2021-06-05 14:05:49,464 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 986 DAG size of output: 563 [2021-06-05 14:05:50,123 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 986 DAG size of output: 563 [2021-06-05 14:05:50,822 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 567 [2021-06-05 14:05:51,705 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 687 [2021-06-05 14:05:52,405 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 170 [2021-06-05 14:05:52,918 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 469 [2021-06-05 14:05:53,524 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 242 [2021-06-05 14:05:53,641 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 223 [2021-06-05 14:05:53,767 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 226 [2021-06-05 14:05:53,994 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 286 [2021-06-05 14:05:54,218 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 286 [2021-06-05 14:05:54,466 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 285 [2021-06-05 14:05:55,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:05:55,066 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:05:55,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:55,067 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:05:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:55,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124058657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:55,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:55,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:05:55,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486123422] [2021-06-05 14:05:55,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:05:55,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:55,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:05:55,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:55,093 INFO L87 Difference]: Start difference. First operand 2431 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:05:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:55,743 INFO L93 Difference]: Finished difference Result 2675 states and 7586 transitions. [2021-06-05 14:05:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:05:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:05:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:55,746 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 14:05:55,746 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 14:05:55,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:05:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 14:05:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2423. [2021-06-05 14:05:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.911643270024773) internal successors, (7052), 2422 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 7052 transitions. [2021-06-05 14:05:55,770 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 7052 transitions. Word has length 22 [2021-06-05 14:05:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:55,770 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 7052 transitions. [2021-06-05 14:05:55,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:05:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 7052 transitions. [2021-06-05 14:05:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:05:55,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:55,772 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:55,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20835,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:55,973 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1367011149, now seen corresponding path program 400 times [2021-06-05 14:05:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:55,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212081811] [2021-06-05 14:05:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:56,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:56,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212081811] [2021-06-05 14:05:56,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212081811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:56,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522983581] [2021-06-05 14:05:56,080 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 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 14:05:56,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:56,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:05:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:56,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:56,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:05:57,067 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 298 [2021-06-05 14:05:57,175 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 298 [2021-06-05 14:05:57,300 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 307 [2021-06-05 14:05:57,522 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 259 [2021-06-05 14:05:58,170 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 221 [2021-06-05 14:05:58,282 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 221 [2021-06-05 14:05:58,410 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 227 [2021-06-05 14:05:58,530 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 220 [2021-06-05 14:05:59,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:59,367 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:05:59,368 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:05:59,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:06:00,112 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 310 [2021-06-05 14:06:00,236 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 292 [2021-06-05 14:06:00,805 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 300 [2021-06-05 14:06:00,927 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 300 [2021-06-05 14:06:01,079 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 302 [2021-06-05 14:06:01,262 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 231 [2021-06-05 14:06:02,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:02,119 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:06:02,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:02,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:06:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522983581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:02,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:02,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:06:02,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433639849] [2021-06-05 14:06:02,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:06:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:06:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:06:02,146 INFO L87 Difference]: Start difference. First operand 2423 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:02,658 INFO L93 Difference]: Finished difference Result 2564 states and 7348 transitions. [2021-06-05 14:06:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:06:02,658 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:06:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:02,661 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 14:06:02,661 INFO L226 Difference]: Without dead ends: 2554 [2021-06-05 14:06:02,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:06:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-06-05 14:06:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2425. [2021-06-05 14:06:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.9117161716171616) internal successors, (7058), 2424 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7058 transitions. [2021-06-05 14:06:02,683 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7058 transitions. Word has length 22 [2021-06-05 14:06:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:02,683 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7058 transitions. [2021-06-05 14:06:02,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7058 transitions. [2021-06-05 14:06:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:02,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:02,685 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:02,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21852 [2021-06-05 14:06:02,886 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:02,886 INFO L82 PathProgramCache]: Analyzing trace with hash -80298279, now seen corresponding path program 401 times [2021-06-05 14:06:02,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:02,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232462063] [2021-06-05 14:06:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:06:02,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232462063] [2021-06-05 14:06:02,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232462063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:02,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595940984] [2021-06-05 14:06:02,966 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 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 14:06:02,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:06:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:02,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:02,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:03,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:03,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:04,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:04,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:04,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:06:04,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:06:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:04,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595940984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:04,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:04,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 14:06:04,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438025991] [2021-06-05 14:06:04,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 14:06:04,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 14:06:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:06:04,624 INFO L87 Difference]: Start difference. First operand 2425 states and 7058 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) 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 14:06:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:04,859 INFO L93 Difference]: Finished difference Result 2464 states and 7117 transitions. [2021-06-05 14:06:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:06:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) 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 22 [2021-06-05 14:06:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:04,861 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 14:06:04,861 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 14:06:04,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:06:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 14:06:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2425. [2021-06-05 14:06:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.911303630363036) internal successors, (7057), 2424 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7057 transitions. [2021-06-05 14:06:04,883 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7057 transitions. Word has length 22 [2021-06-05 14:06:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:04,883 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7057 transitions. [2021-06-05 14:06:04,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) 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 14:06:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7057 transitions. [2021-06-05 14:06:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:04,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:04,885 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:05,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22414 [2021-06-05 14:06:05,086 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash -128763657, now seen corresponding path program 402 times [2021-06-05 14:06:05,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:05,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71817515] [2021-06-05 14:06:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:05,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71817515] [2021-06-05 14:06:05,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71817515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560626543] [2021-06-05 14:06:05,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:06:05,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:06:05,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:05,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:05,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:05,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:06,289 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 304 [2021-06-05 14:06:06,405 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 304 [2021-06-05 14:06:06,549 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 315 [2021-06-05 14:06:06,752 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 361 [2021-06-05 14:06:07,761 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 293 [2021-06-05 14:06:07,993 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 385 [2021-06-05 14:06:08,244 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 385 [2021-06-05 14:06:08,499 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 390 [2021-06-05 14:06:08,631 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 266 [2021-06-05 14:06:09,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:09,828 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:06:09,828 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:06:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:06:10,528 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 184 [2021-06-05 14:06:10,708 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 207 [2021-06-05 14:06:11,127 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 189 [2021-06-05 14:06:11,818 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 239 [2021-06-05 14:06:11,972 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 239 [2021-06-05 14:06:12,133 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 244 [2021-06-05 14:06:12,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:12,750 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:06:12,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:12,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:06:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:12,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560626543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:12,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:12,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:06:12,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480005878] [2021-06-05 14:06:12,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:06:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:06:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:06:12,776 INFO L87 Difference]: Start difference. First operand 2425 states and 7057 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:13,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:13,209 INFO L93 Difference]: Finished difference Result 2669 states and 7612 transitions. [2021-06-05 14:06:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:06:13,209 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:06:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:13,212 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 14:06:13,212 INFO L226 Difference]: Without dead ends: 2659 [2021-06-05 14:06:13,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:06:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-06-05 14:06:13,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2426. [2021-06-05 14:06:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 2.9117525773195876) internal successors, (7061), 2425 states have internal predecessors, (7061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 7061 transitions. [2021-06-05 14:06:13,234 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 7061 transitions. Word has length 22 [2021-06-05 14:06:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:13,235 INFO L482 AbstractCegarLoop]: Abstraction has 2426 states and 7061 transitions. [2021-06-05 14:06:13,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 7061 transitions. [2021-06-05 14:06:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:13,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:13,237 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:13,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22653 [2021-06-05 14:06:13,437 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash -399035461, now seen corresponding path program 403 times [2021-06-05 14:06:13,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:13,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104015736] [2021-06-05 14:06:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:13,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104015736] [2021-06-05 14:06:13,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104015736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997354060] [2021-06-05 14:06:13,526 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 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 14:06:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:13,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:13,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:13,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:14,855 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 250 [2021-06-05 14:06:15,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:15,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:15,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:06:15,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:06:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997354060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:15,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:15,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:06:15,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090899331] [2021-06-05 14:06:15,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:06:15,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:06:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:06:15,382 INFO L87 Difference]: Start difference. First operand 2426 states and 7061 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:06:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:15,803 INFO L93 Difference]: Finished difference Result 2557 states and 7399 transitions. [2021-06-05 14:06:15,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:15,803 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:06:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:15,806 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 14:06:15,806 INFO L226 Difference]: Without dead ends: 2541 [2021-06-05 14:06:15,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:06:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-06-05 14:06:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2477. [2021-06-05 14:06:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.9232633279483036) internal successors, (7238), 2476 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7238 transitions. [2021-06-05 14:06:15,829 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7238 transitions. Word has length 22 [2021-06-05 14:06:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:15,829 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7238 transitions. [2021-06-05 14:06:15,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:06:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7238 transitions. [2021-06-05 14:06:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:15,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:15,831 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:16,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23353,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:16,032 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash 459839069, now seen corresponding path program 404 times [2021-06-05 14:06:16,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:16,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536129989] [2021-06-05 14:06:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:16,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536129989] [2021-06-05 14:06:16,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536129989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589594171] [2021-06-05 14:06:16,120 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:16,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:16,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:16,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:16,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:16,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:16,929 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 229 [2021-06-05 14:06:17,077 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 186 [2021-06-05 14:06:18,311 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 307 [2021-06-05 14:06:18,479 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 307 [2021-06-05 14:06:18,681 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 312 [2021-06-05 14:06:18,828 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 288 [2021-06-05 14:06:19,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:19,919 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:06:19,920 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:06:19,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:06:21,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:21,683 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:06:21,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:21,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:06:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:21,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589594171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:21,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:21,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:06:21,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467253137] [2021-06-05 14:06:21,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:06:21,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:21,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:06:21,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:06:21,711 INFO L87 Difference]: Start difference. First operand 2477 states and 7238 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:06:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:22,526 INFO L93 Difference]: Finished difference Result 2676 states and 7671 transitions. [2021-06-05 14:06:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:06:22,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:06:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:22,529 INFO L225 Difference]: With dead ends: 2676 [2021-06-05 14:06:22,529 INFO L226 Difference]: Without dead ends: 2650 [2021-06-05 14:06:22,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:06:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-05 14:06:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2483. [2021-06-05 14:06:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.9234488315874296) internal successors, (7256), 2482 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7256 transitions. [2021-06-05 14:06:22,553 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7256 transitions. Word has length 22 [2021-06-05 14:06:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:22,553 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 7256 transitions. [2021-06-05 14:06:22,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:06:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7256 transitions. [2021-06-05 14:06:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:22,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:22,555 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:22,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23564 [2021-06-05 14:06:22,756 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2124514919, now seen corresponding path program 405 times [2021-06-05 14:06:22,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:22,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26063771] [2021-06-05 14:06:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:06:22,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:22,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26063771] [2021-06-05 14:06:22,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26063771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:22,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126491597] [2021-06-05 14:06:22,844 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 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 14:06:22,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:06:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:22,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:23,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:23,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:24,567 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 257 [2021-06-05 14:06:24,729 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 281 [2021-06-05 14:06:25,105 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 347 [2021-06-05 14:06:25,383 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 433 [2021-06-05 14:06:25,676 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 433 [2021-06-05 14:06:25,983 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 438 [2021-06-05 14:06:26,298 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 513 [2021-06-05 14:06:26,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:27,146 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:06:27,146 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:06:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:06:27,782 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 282 [2021-06-05 14:06:28,571 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 214 [2021-06-05 14:06:28,733 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 253 [2021-06-05 14:06:28,919 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-06-05 14:06:29,538 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 210 [2021-06-05 14:06:29,728 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 234 [2021-06-05 14:06:30,055 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 389 [2021-06-05 14:06:30,379 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 389 [2021-06-05 14:06:30,786 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 395 [2021-06-05 14:06:31,271 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 521 [2021-06-05 14:06:32,293 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 241 [2021-06-05 14:06:32,468 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 226 [2021-06-05 14:06:33,398 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 257 [2021-06-05 14:06:33,638 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 371 [2021-06-05 14:06:33,874 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 371 [2021-06-05 14:06:34,069 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 284 [2021-06-05 14:06:34,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:34,492 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:06:34,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:34,493 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:06:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126491597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:34,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:34,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:06:34,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612085765] [2021-06-05 14:06:34,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:06:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:06:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:06:34,519 INFO L87 Difference]: Start difference. First operand 2483 states and 7256 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:06:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:35,028 INFO L93 Difference]: Finished difference Result 2619 states and 7552 transitions. [2021-06-05 14:06:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:06:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:06:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:35,031 INFO L225 Difference]: With dead ends: 2619 [2021-06-05 14:06:35,031 INFO L226 Difference]: Without dead ends: 2609 [2021-06-05 14:06:35,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:06:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-05 14:06:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2498. [2021-06-05 14:06:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.924309171005206) internal successors, (7302), 2497 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 7302 transitions. [2021-06-05 14:06:35,055 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 7302 transitions. Word has length 22 [2021-06-05 14:06:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:35,055 INFO L482 AbstractCegarLoop]: Abstraction has 2498 states and 7302 transitions. [2021-06-05 14:06:35,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:06:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 7302 transitions. [2021-06-05 14:06:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:35,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:35,057 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:35,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24137 [2021-06-05 14:06:35,257 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash -635109923, now seen corresponding path program 406 times [2021-06-05 14:06:35,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:35,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459627378] [2021-06-05 14:06:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:35,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:35,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459627378] [2021-06-05 14:06:35,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459627378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:35,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140581006] [2021-06-05 14:06:35,369 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 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 14:06:35,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:35,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:35,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:35,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:36,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:36,613 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:06:36,613 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:06:36,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:06:37,443 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 194 [2021-06-05 14:06:38,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:38,079 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:06:38,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:38,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:06:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140581006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:38,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:06:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044600562] [2021-06-05 14:06:38,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:06:38,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:06:38,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:06:38,105 INFO L87 Difference]: Start difference. First operand 2498 states and 7302 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:38,762 INFO L93 Difference]: Finished difference Result 2729 states and 7824 transitions. [2021-06-05 14:06:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:06:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:06:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:38,765 INFO L225 Difference]: With dead ends: 2729 [2021-06-05 14:06:38,765 INFO L226 Difference]: Without dead ends: 2700 [2021-06-05 14:06:38,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:06:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-06-05 14:06:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2493. [2021-06-05 14:06:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.923354735152488) internal successors, (7285), 2492 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7285 transitions. [2021-06-05 14:06:38,788 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7285 transitions. Word has length 22 [2021-06-05 14:06:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:38,788 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 7285 transitions. [2021-06-05 14:06:38,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:38,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7285 transitions. [2021-06-05 14:06:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:38,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:38,790 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:38,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25258 [2021-06-05 14:06:38,991 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:38,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1708195303, now seen corresponding path program 407 times [2021-06-05 14:06:38,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:38,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633446567] [2021-06-05 14:06:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:39,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:39,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633446567] [2021-06-05 14:06:39,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633446567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:39,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376999627] [2021-06-05 14:06:39,092 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 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 14:06:39,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:06:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:39,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:39,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:06:40,018 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 259 [2021-06-05 14:06:40,140 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 271 [2021-06-05 14:06:40,263 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 271 [2021-06-05 14:06:40,404 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 278 [2021-06-05 14:06:40,543 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 273 [2021-06-05 14:06:40,646 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 285 [2021-06-05 14:06:41,440 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 209 [2021-06-05 14:06:41,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:42,106 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:06:42,107 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:06:42,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:06:43,124 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 278 [2021-06-05 14:06:43,335 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 393 [2021-06-05 14:06:43,564 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 393 [2021-06-05 14:06:43,832 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 401 [2021-06-05 14:06:44,315 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 626 [2021-06-05 14:06:44,712 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 455 [2021-06-05 14:06:45,385 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 247 [2021-06-05 14:06:45,949 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 350 [2021-06-05 14:06:46,274 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 394 [2021-06-05 14:06:47,253 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 321 [2021-06-05 14:06:47,757 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 563 [2021-06-05 14:06:48,418 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 1008 DAG size of output: 764 [2021-06-05 14:06:49,568 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 360 [2021-06-05 14:06:49,730 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 278 [2021-06-05 14:06:50,796 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 296 [2021-06-05 14:06:51,082 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 340 [2021-06-05 14:06:51,417 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 444 [2021-06-05 14:06:52,021 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 882 DAG size of output: 687 [2021-06-05 14:06:53,345 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1727 DAG size of output: 1179 [2021-06-05 14:06:54,677 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1727 DAG size of output: 1179 [2021-06-05 14:06:56,180 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 1733 DAG size of output: 1185 [2021-06-05 14:06:57,361 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1187 DAG size of output: 1085 [2021-06-05 14:06:57,723 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 521 [2021-06-05 14:06:58,130 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 425 [2021-06-05 14:06:58,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:06:58,921 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:06:58,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:58,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:06:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:58,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376999627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:58,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:58,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:06:58,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340238629] [2021-06-05 14:06:58,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:06:58,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:06:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:06:58,947 INFO L87 Difference]: Start difference. First operand 2493 states and 7285 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:59,380 INFO L93 Difference]: Finished difference Result 2656 states and 7653 transitions. [2021-06-05 14:06:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:06:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:06:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:59,383 INFO L225 Difference]: With dead ends: 2656 [2021-06-05 14:06:59,383 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 14:06:59,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:06:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 14:06:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2494. [2021-06-05 14:06:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 2.923385479342158) internal successors, (7288), 2493 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 7288 transitions. [2021-06-05 14:06:59,406 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 7288 transitions. Word has length 22 [2021-06-05 14:06:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:59,406 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 7288 transitions. [2021-06-05 14:06:59,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:06:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 7288 transitions. [2021-06-05 14:06:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:06:59,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:59,408 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:59,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25595 [2021-06-05 14:06:59,609 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash 18563529, now seen corresponding path program 408 times [2021-06-05 14:06:59,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:59,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221528000] [2021-06-05 14:06:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:06:59,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221528000] [2021-06-05 14:06:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221528000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350586251] [2021-06-05 14:06:59,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:06:59,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:06:59,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:59,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:06:59,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:00,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:00,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:01,038 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 251 [2021-06-05 14:07:01,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 251 [2021-06-05 14:07:01,267 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 256 [2021-06-05 14:07:01,392 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 283 [2021-06-05 14:07:02,296 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 247 [2021-06-05 14:07:02,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:02,783 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:02,784 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:02,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:04,151 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 220 [2021-06-05 14:07:04,347 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 291 [2021-06-05 14:07:04,562 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 291 [2021-06-05 14:07:04,784 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 286 [2021-06-05 14:07:04,984 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 298 [2021-06-05 14:07:05,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:05,475 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:05,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:05,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:05,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350586251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:05,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:05,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:07:05,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286473392] [2021-06-05 14:07:05,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:07:05,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:07:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:07:05,501 INFO L87 Difference]: Start difference. First operand 2494 states and 7288 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:07:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:06,156 INFO L93 Difference]: Finished difference Result 2719 states and 7749 transitions. [2021-06-05 14:07:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:07:06,156 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:07:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:06,159 INFO L225 Difference]: With dead ends: 2719 [2021-06-05 14:07:06,159 INFO L226 Difference]: Without dead ends: 2697 [2021-06-05 14:07:06,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:07:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-06-05 14:07:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2493. [2021-06-05 14:07:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.92215088282504) internal successors, (7282), 2492 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7282 transitions. [2021-06-05 14:07:06,181 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7282 transitions. Word has length 22 [2021-06-05 14:07:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:06,181 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 7282 transitions. [2021-06-05 14:07:06,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:07:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7282 transitions. [2021-06-05 14:07:06,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:06,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:06,183 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:06,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26889,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:06,384 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1507968525, now seen corresponding path program 409 times [2021-06-05 14:07:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:06,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632338061] [2021-06-05 14:07:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:06,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632338061] [2021-06-05 14:07:06,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632338061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167015273] [2021-06-05 14:07:06,502 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 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 14:07:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:06,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:06,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:06,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:07,585 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 256 [2021-06-05 14:07:07,832 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 301 [2021-06-05 14:07:08,570 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 213 [2021-06-05 14:07:08,688 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 269 [2021-06-05 14:07:09,208 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 251 [2021-06-05 14:07:09,729 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 232 [2021-06-05 14:07:09,937 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-06-05 14:07:10,279 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 391 [2021-06-05 14:07:10,602 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 391 [2021-06-05 14:07:10,956 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 396 [2021-06-05 14:07:11,368 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 478 [2021-06-05 14:07:11,806 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 275 [2021-06-05 14:07:11,926 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 275 [2021-06-05 14:07:12,075 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 278 [2021-06-05 14:07:12,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:12,551 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:12,552 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:12,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:13,135 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 233 [2021-06-05 14:07:13,793 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 276 [2021-06-05 14:07:14,011 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 308 [2021-06-05 14:07:14,237 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 308 [2021-06-05 14:07:14,469 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 312 [2021-06-05 14:07:14,748 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 361 [2021-06-05 14:07:15,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:15,385 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:15,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:15,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:15,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167015273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:15,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:15,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:07:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340817483] [2021-06-05 14:07:15,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:07:15,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:07:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:15,411 INFO L87 Difference]: Start difference. First operand 2493 states and 7282 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:07:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:16,102 INFO L93 Difference]: Finished difference Result 2781 states and 7913 transitions. [2021-06-05 14:07:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:07:16,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:07:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:16,106 INFO L225 Difference]: With dead ends: 2781 [2021-06-05 14:07:16,106 INFO L226 Difference]: Without dead ends: 2752 [2021-06-05 14:07:16,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:07:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-06-05 14:07:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2480. [2021-06-05 14:07:16,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.919322307382009) internal successors, (7237), 2479 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 7237 transitions. [2021-06-05 14:07:16,129 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 7237 transitions. Word has length 22 [2021-06-05 14:07:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:16,129 INFO L482 AbstractCegarLoop]: Abstraction has 2480 states and 7237 transitions. [2021-06-05 14:07:16,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:07:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 7237 transitions. [2021-06-05 14:07:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:16,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:16,131 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:16,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27455,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:16,332 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 434883145, now seen corresponding path program 410 times [2021-06-05 14:07:16,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:16,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396601526] [2021-06-05 14:07:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:16,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:16,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396601526] [2021-06-05 14:07:16,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396601526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:16,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309118837] [2021-06-05 14:07:16,426 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 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 14:07:16,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:16,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:16,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:16,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:16,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:16,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:17,543 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 232 [2021-06-05 14:07:17,830 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 269 [2021-06-05 14:07:18,094 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 306 [2021-06-05 14:07:18,811 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 290 [2021-06-05 14:07:19,007 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 351 [2021-06-05 14:07:19,220 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 349 [2021-06-05 14:07:19,403 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 329 [2021-06-05 14:07:19,551 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 222 [2021-06-05 14:07:20,101 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 247 [2021-06-05 14:07:20,505 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 491 [2021-06-05 14:07:20,619 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 199 [2021-06-05 14:07:21,835 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 314 [2021-06-05 14:07:22,494 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 678 [2021-06-05 14:07:23,174 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 678 [2021-06-05 14:07:23,907 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 685 [2021-06-05 14:07:24,785 WARN L205 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 741 [2021-06-05 14:07:25,018 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 377 [2021-06-05 14:07:25,133 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 218 [2021-06-05 14:07:25,637 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 219 [2021-06-05 14:07:25,739 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 219 [2021-06-05 14:07:25,848 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 223 [2021-06-05 14:07:25,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:26,150 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:26,151 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:26,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:27,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:27,369 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:27,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:27,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:27,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309118837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:27,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:27,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:07:27,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787901727] [2021-06-05 14:07:27,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:07:27,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:07:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:27,395 INFO L87 Difference]: Start difference. First operand 2480 states and 7237 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:07:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:27,922 INFO L93 Difference]: Finished difference Result 2723 states and 7787 transitions. [2021-06-05 14:07:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:07:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:07:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:27,925 INFO L225 Difference]: With dead ends: 2723 [2021-06-05 14:07:27,925 INFO L226 Difference]: Without dead ends: 2713 [2021-06-05 14:07:27,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:07:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-06-05 14:07:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2482. [2021-06-05 14:07:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 2.9185812172511083) internal successors, (7241), 2481 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 7241 transitions. [2021-06-05 14:07:27,949 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 7241 transitions. Word has length 22 [2021-06-05 14:07:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:27,949 INFO L482 AbstractCegarLoop]: Abstraction has 2482 states and 7241 transitions. [2021-06-05 14:07:27,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:07:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 7241 transitions. [2021-06-05 14:07:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:27,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:27,951 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:28,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28155 [2021-06-05 14:07:28,151 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash -832574033, now seen corresponding path program 411 times [2021-06-05 14:07:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:28,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223474157] [2021-06-05 14:07:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:28,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223474157] [2021-06-05 14:07:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223474157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312156032] [2021-06-05 14:07:28,257 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 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 14:07:28,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:07:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:28,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:28,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:28,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:29,182 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 272 [2021-06-05 14:07:29,301 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-06-05 14:07:29,486 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 378 [2021-06-05 14:07:30,144 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 261 [2021-06-05 14:07:30,273 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 280 [2021-06-05 14:07:30,401 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 280 [2021-06-05 14:07:30,610 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 300 [2021-06-05 14:07:31,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:31,518 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:31,518 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:32,123 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 224 [2021-06-05 14:07:33,106 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 187 [2021-06-05 14:07:33,303 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 206 [2021-06-05 14:07:34,415 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 230 [2021-06-05 14:07:34,595 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 283 [2021-06-05 14:07:34,847 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 336 [2021-06-05 14:07:35,167 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 351 [2021-06-05 14:07:35,721 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 413 [2021-06-05 14:07:36,284 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 413 [2021-06-05 14:07:36,928 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-06-05 14:07:37,249 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 282 [2021-06-05 14:07:37,523 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 303 [2021-06-05 14:07:38,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:38,406 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:38,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:38,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:38,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312156032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:38,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:38,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:07:38,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32684909] [2021-06-05 14:07:38,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:07:38,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:38,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:07:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:38,432 INFO L87 Difference]: Start difference. First operand 2482 states and 7241 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:07:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:39,209 INFO L93 Difference]: Finished difference Result 2895 states and 8241 transitions. [2021-06-05 14:07:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:07:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:07:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:39,213 INFO L225 Difference]: With dead ends: 2895 [2021-06-05 14:07:39,213 INFO L226 Difference]: Without dead ends: 2885 [2021-06-05 14:07:39,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:07:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-06-05 14:07:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2483. [2021-06-05 14:07:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.91941982272361) internal successors, (7246), 2482 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7246 transitions. [2021-06-05 14:07:39,236 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7246 transitions. Word has length 22 [2021-06-05 14:07:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:39,237 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 7246 transitions. [2021-06-05 14:07:39,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:07:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7246 transitions. [2021-06-05 14:07:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:39,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:39,239 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:39,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28822 [2021-06-05 14:07:39,439 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1959720747, now seen corresponding path program 412 times [2021-06-05 14:07:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:39,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833196994] [2021-06-05 14:07:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:39,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:39,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833196994] [2021-06-05 14:07:39,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833196994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:39,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911770940] [2021-06-05 14:07:39,525 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 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 14:07:39,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:39,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:39,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:39,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:41,957 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 328 [2021-06-05 14:07:42,224 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 450 [2021-06-05 14:07:42,561 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 755 DAG size of output: 488 [2021-06-05 14:07:42,912 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 755 DAG size of output: 488 [2021-06-05 14:07:43,278 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 760 DAG size of output: 493 [2021-06-05 14:07:43,557 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 433 [2021-06-05 14:07:43,701 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 281 [2021-06-05 14:07:44,140 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 274 [2021-06-05 14:07:44,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:44,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:44,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:44,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:07:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:44,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911770940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:44,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:44,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:07:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347919733] [2021-06-05 14:07:44,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:07:44,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:44,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:07:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:07:44,884 INFO L87 Difference]: Start difference. First operand 2483 states and 7246 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:07:45,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:45,374 INFO L93 Difference]: Finished difference Result 2645 states and 7685 transitions. [2021-06-05 14:07:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:07:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:45,377 INFO L225 Difference]: With dead ends: 2645 [2021-06-05 14:07:45,377 INFO L226 Difference]: Without dead ends: 2627 [2021-06-05 14:07:45,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:07:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-06-05 14:07:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2561. [2021-06-05 14:07:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.933984375) internal successors, (7511), 2560 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 7511 transitions. [2021-06-05 14:07:45,401 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 7511 transitions. Word has length 22 [2021-06-05 14:07:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:45,401 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 7511 transitions. [2021-06-05 14:07:45,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:07:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 7511 transitions. [2021-06-05 14:07:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:45,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:45,403 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:45,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29593 [2021-06-05 14:07:45,604 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1476372019, now seen corresponding path program 413 times [2021-06-05 14:07:45,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:45,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195218115] [2021-06-05 14:07:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:45,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195218115] [2021-06-05 14:07:45,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195218115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:45,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477939678] [2021-06-05 14:07:45,690 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 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 14:07:45,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:07:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:45,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:46,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:46,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:47,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:47,726 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:47,727 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:47,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:49,209 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 265 [2021-06-05 14:07:50,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:50,091 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:50,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:50,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:50,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477939678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:50,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:50,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:07:50,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212209669] [2021-06-05 14:07:50,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:07:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:07:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:07:50,117 INFO L87 Difference]: Start difference. First operand 2561 states and 7511 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:07:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:51,119 INFO L93 Difference]: Finished difference Result 2850 states and 8157 transitions. [2021-06-05 14:07:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:07:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:07:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:51,122 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 14:07:51,122 INFO L226 Difference]: Without dead ends: 2817 [2021-06-05 14:07:51,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:07:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-06-05 14:07:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2572. [2021-06-05 14:07:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2571 states have (on average 2.9362115908206925) internal successors, (7549), 2571 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 7549 transitions. [2021-06-05 14:07:51,146 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 7549 transitions. Word has length 22 [2021-06-05 14:07:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:51,146 INFO L482 AbstractCegarLoop]: Abstraction has 2572 states and 7549 transitions. [2021-06-05 14:07:51,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:07:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 7549 transitions. [2021-06-05 14:07:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:51,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:51,148 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:51,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30257 [2021-06-05 14:07:51,349 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash 234241289, now seen corresponding path program 414 times [2021-06-05 14:07:51,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:51,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684801967] [2021-06-05 14:07:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:51,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:51,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684801967] [2021-06-05 14:07:51,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684801967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:51,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089686022] [2021-06-05 14:07:51,444 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 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 14:07:51,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:07:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:51,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:51,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:52,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:53,151 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:53,151 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:54,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:54,687 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:54,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:54,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:54,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089686022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:54,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:54,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:07:54,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296218042] [2021-06-05 14:07:54,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:07:54,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:54,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:07:54,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:54,713 INFO L87 Difference]: Start difference. First operand 2572 states and 7549 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:07:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:55,870 INFO L93 Difference]: Finished difference Result 3018 states and 8552 transitions. [2021-06-05 14:07:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 14:07:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:07:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:55,874 INFO L225 Difference]: With dead ends: 3018 [2021-06-05 14:07:55,874 INFO L226 Difference]: Without dead ends: 2971 [2021-06-05 14:07:55,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 766.5ms TimeCoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:07:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-06-05 14:07:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2579. [2021-06-05 14:07:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 2.933281613653995) internal successors, (7562), 2578 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 7562 transitions. [2021-06-05 14:07:55,899 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 7562 transitions. Word has length 22 [2021-06-05 14:07:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:55,899 INFO L482 AbstractCegarLoop]: Abstraction has 2579 states and 7562 transitions. [2021-06-05 14:07:55,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:07:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 7562 transitions. [2021-06-05 14:07:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:07:55,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:55,901 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:56,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30881 [2021-06-05 14:07:56,101 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:56,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1723646285, now seen corresponding path program 415 times [2021-06-05 14:07:56,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:56,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223638363] [2021-06-05 14:07:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:56,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:56,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223638363] [2021-06-05 14:07:56,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223638363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126085235] [2021-06-05 14:07:56,198 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 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 14:07:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:56,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:07:56,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:56,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:56,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:07:58,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:58,392 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:07:58,393 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:07:58,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:07:59,268 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 171 [2021-06-05 14:07:59,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:07:59,584 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:07:59,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:59,585 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:07:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126085235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:59,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:59,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:07:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76725000] [2021-06-05 14:07:59,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:07:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:07:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:59,610 INFO L87 Difference]: Start difference. First operand 2579 states and 7562 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:08:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:00,307 INFO L93 Difference]: Finished difference Result 2793 states and 8044 transitions. [2021-06-05 14:08:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:08:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:08:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:00,310 INFO L225 Difference]: With dead ends: 2793 [2021-06-05 14:08:00,310 INFO L226 Difference]: Without dead ends: 2778 [2021-06-05 14:08:00,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:08:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-06-05 14:08:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2592. [2021-06-05 14:08:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.932458510227711) internal successors, (7598), 2591 states have internal predecessors, (7598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7598 transitions. [2021-06-05 14:08:00,335 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7598 transitions. Word has length 22 [2021-06-05 14:08:00,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:00,335 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 7598 transitions. [2021-06-05 14:08:00,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:08:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7598 transitions. [2021-06-05 14:08:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:00,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:00,337 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:00,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31233,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:00,537 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash 650560905, now seen corresponding path program 416 times [2021-06-05 14:08:00,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:00,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313625600] [2021-06-05 14:08:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:00,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313625600] [2021-06-05 14:08:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313625600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189743649] [2021-06-05 14:08:00,644 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 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 14:08:00,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:00,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:01,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:01,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:02,363 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 191 [2021-06-05 14:08:02,497 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 212 [2021-06-05 14:08:02,774 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 240 [2021-06-05 14:08:03,508 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 237 [2021-06-05 14:08:03,660 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 273 [2021-06-05 14:08:03,922 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 377 [2021-06-05 14:08:04,207 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 377 [2021-06-05 14:08:04,494 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 382 [2021-06-05 14:08:04,859 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 500 [2021-06-05 14:08:05,041 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 290 [2021-06-05 14:08:05,288 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 212 [2021-06-05 14:08:05,392 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 212 [2021-06-05 14:08:05,508 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 216 [2021-06-05 14:08:05,615 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 246 [2021-06-05 14:08:05,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:06,030 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:06,031 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:06,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:07,610 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 199 [2021-06-05 14:08:07,722 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 201 [2021-06-05 14:08:07,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:07,980 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:08:07,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:07,980 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:08:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:08,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189743649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:08,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:08:08,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095602374] [2021-06-05 14:08:08,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:08:08,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:08:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:08,007 INFO L87 Difference]: Start difference. First operand 2592 states and 7598 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:08:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:08,623 INFO L93 Difference]: Finished difference Result 2874 states and 8265 transitions. [2021-06-05 14:08:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:08:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:08:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:08,626 INFO L225 Difference]: With dead ends: 2874 [2021-06-05 14:08:08,626 INFO L226 Difference]: Without dead ends: 2852 [2021-06-05 14:08:08,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:08:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-06-05 14:08:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2592. [2021-06-05 14:08:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-06-05 14:08:08,651 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-06-05 14:08:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:08,651 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-06-05 14:08:08,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:08:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-06-05 14:08:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:08,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:08,653 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:08,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31625,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:08,853 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1744652493, now seen corresponding path program 417 times [2021-06-05 14:08:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:08,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011139748] [2021-06-05 14:08:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:08,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:08,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011139748] [2021-06-05 14:08:08,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011139748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5796251] [2021-06-05 14:08:08,960 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 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 14:08:08,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:08,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:08,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:09,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:09,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:10,515 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 255 [2021-06-05 14:08:11,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:11,547 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:11,548 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:11,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:12,215 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 251 [2021-06-05 14:08:12,364 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 254 [2021-06-05 14:08:13,384 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 301 [2021-06-05 14:08:13,604 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 326 [2021-06-05 14:08:13,824 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 326 [2021-06-05 14:08:14,102 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 329 [2021-06-05 14:08:14,341 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 373 [2021-06-05 14:08:15,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:15,235 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:08:15,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:15,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:08:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:15,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5796251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:15,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:15,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:08:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736696802] [2021-06-05 14:08:15,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:08:15,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:08:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:15,262 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:08:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:15,772 INFO L93 Difference]: Finished difference Result 2811 states and 8117 transitions. [2021-06-05 14:08:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:08:15,773 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:08:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:15,775 INFO L225 Difference]: With dead ends: 2811 [2021-06-05 14:08:15,775 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 14:08:15,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:08:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 14:08:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2592. [2021-06-05 14:08:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-06-05 14:08:15,799 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-06-05 14:08:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:15,799 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-06-05 14:08:15,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:08:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-06-05 14:08:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:15,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:15,802 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:16,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32315 [2021-06-05 14:08:16,002 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash -560398563, now seen corresponding path program 418 times [2021-06-05 14:08:16,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:16,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908954083] [2021-06-05 14:08:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:16,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:16,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908954083] [2021-06-05 14:08:16,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908954083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:16,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482300012] [2021-06-05 14:08:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:16,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:16,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:16,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:17,168 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 221 [2021-06-05 14:08:18,149 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-06-05 14:08:18,314 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 312 [2021-06-05 14:08:19,045 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 417 [2021-06-05 14:08:19,321 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 417 [2021-06-05 14:08:19,643 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 422 [2021-06-05 14:08:20,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:20,857 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:20,857 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:20,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:21,573 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 243 [2021-06-05 14:08:22,498 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 229 [2021-06-05 14:08:22,648 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-06-05 14:08:22,778 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-06-05 14:08:22,940 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 241 [2021-06-05 14:08:24,369 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 252 [2021-06-05 14:08:24,604 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 338 [2021-06-05 14:08:24,818 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 338 [2021-06-05 14:08:25,066 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 342 [2021-06-05 14:08:25,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:25,595 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:08:25,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:25,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:08:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:25,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482300012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:25,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:25,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:08:25,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734908974] [2021-06-05 14:08:25,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:08:25,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:08:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:08:25,621 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:08:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:26,434 INFO L93 Difference]: Finished difference Result 3052 states and 8624 transitions. [2021-06-05 14:08:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:08:26,434 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:08:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:26,438 INFO L225 Difference]: With dead ends: 3052 [2021-06-05 14:08:26,438 INFO L226 Difference]: Without dead ends: 3011 [2021-06-05 14:08:26,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:08:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-06-05 14:08:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2594. [2021-06-05 14:08:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.9298110296953337) internal successors, (7597), 2593 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7597 transitions. [2021-06-05 14:08:26,465 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7597 transitions. Word has length 22 [2021-06-05 14:08:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:26,465 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7597 transitions. [2021-06-05 14:08:26,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:08:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7597 transitions. [2021-06-05 14:08:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:26,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:26,467 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:26,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32866,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:26,667 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1633483943, now seen corresponding path program 419 times [2021-06-05 14:08:26,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:26,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055238387] [2021-06-05 14:08:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:26,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:26,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055238387] [2021-06-05 14:08:26,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055238387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:26,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209730100] [2021-06-05 14:08:26,773 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 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 14:08:26,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:26,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:26,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:26,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:27,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:27,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:28,358 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 250 [2021-06-05 14:08:28,461 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 250 [2021-06-05 14:08:28,598 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 256 [2021-06-05 14:08:28,740 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 285 [2021-06-05 14:08:30,241 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 229 [2021-06-05 14:08:30,420 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 331 [2021-06-05 14:08:30,627 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 331 [2021-06-05 14:08:30,821 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 334 [2021-06-05 14:08:30,980 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 318 [2021-06-05 14:08:31,154 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 292 [2021-06-05 14:08:31,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:31,610 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:31,611 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:32,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:32,521 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:08:32,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:32,522 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:08:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:32,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209730100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:32,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:32,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:08:32,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946230680] [2021-06-05 14:08:32,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:08:32,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:08:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:32,549 INFO L87 Difference]: Start difference. First operand 2594 states and 7597 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:08:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:33,349 INFO L93 Difference]: Finished difference Result 3138 states and 8959 transitions. [2021-06-05 14:08:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:08:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:08:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:33,353 INFO L225 Difference]: With dead ends: 3138 [2021-06-05 14:08:33,353 INFO L226 Difference]: Without dead ends: 3107 [2021-06-05 14:08:33,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 753.5ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:08:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-06-05 14:08:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2554. [2021-06-05 14:08:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.928319623971798) internal successors, (7476), 2553 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 7476 transitions. [2021-06-05 14:08:33,380 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 7476 transitions. Word has length 22 [2021-06-05 14:08:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:33,380 INFO L482 AbstractCegarLoop]: Abstraction has 2554 states and 7476 transitions. [2021-06-05 14:08:33,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:08:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 7476 transitions. [2021-06-05 14:08:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:33,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:33,382 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:33,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33726,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:33,583 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:33,583 INFO L82 PathProgramCache]: Analyzing trace with hash -539392355, now seen corresponding path program 420 times [2021-06-05 14:08:33,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:33,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114921491] [2021-06-05 14:08:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:33,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:33,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114921491] [2021-06-05 14:08:33,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114921491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:33,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340257360] [2021-06-05 14:08:33,690 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 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 14:08:33,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:08:33,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:33,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:33,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:34,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:34,873 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 289 [2021-06-05 14:08:35,039 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 428 [2021-06-05 14:08:35,204 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 428 [2021-06-05 14:08:35,402 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 439 [2021-06-05 14:08:35,802 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 598 [2021-06-05 14:08:35,972 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 354 [2021-06-05 14:08:37,001 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 380 [2021-06-05 14:08:37,287 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 433 [2021-06-05 14:08:37,553 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 490 [2021-06-05 14:08:37,962 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 954 DAG size of output: 630 [2021-06-05 14:08:38,355 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 954 DAG size of output: 630 [2021-06-05 14:08:38,797 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 635 [2021-06-05 14:08:39,221 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 719 [2021-06-05 14:08:39,338 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 157 [2021-06-05 14:08:39,585 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 272 [2021-06-05 14:08:39,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:40,104 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:40,104 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:40,825 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 259 [2021-06-05 14:08:40,937 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 275 [2021-06-05 14:08:41,821 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 196 [2021-06-05 14:08:42,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:42,307 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:08:42,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:42,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:08:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:42,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340257360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:42,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:08:42,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843036172] [2021-06-05 14:08:42,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:08:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:08:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:42,334 INFO L87 Difference]: Start difference. First operand 2554 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:08:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:42,923 INFO L93 Difference]: Finished difference Result 3000 states and 8594 transitions. [2021-06-05 14:08:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:08:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:08:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:42,926 INFO L225 Difference]: With dead ends: 3000 [2021-06-05 14:08:42,926 INFO L226 Difference]: Without dead ends: 2990 [2021-06-05 14:08:42,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:08:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-06-05 14:08:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2556. [2021-06-05 14:08:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9287671232876713) internal successors, (7483), 2555 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7483 transitions. [2021-06-05 14:08:42,954 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7483 transitions. Word has length 22 [2021-06-05 14:08:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:42,954 INFO L482 AbstractCegarLoop]: Abstraction has 2556 states and 7483 transitions. [2021-06-05 14:08:42,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:08:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7483 transitions. [2021-06-05 14:08:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:42,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:42,956 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:43,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34275,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:43,157 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2125188711, now seen corresponding path program 421 times [2021-06-05 14:08:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:43,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215672894] [2021-06-05 14:08:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:43,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215672894] [2021-06-05 14:08:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215672894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879799592] [2021-06-05 14:08:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:43,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:43,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:44,820 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 250 [2021-06-05 14:08:45,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:45,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:45,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:45,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:45,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879799592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:45,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:45,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 14:08:45,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630700969] [2021-06-05 14:08:45,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 14:08:45,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:45,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 14:08:45,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:08:45,198 INFO L87 Difference]: Start difference. First operand 2556 states and 7483 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) 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 14:08:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:45,519 INFO L93 Difference]: Finished difference Result 2587 states and 7530 transitions. [2021-06-05 14:08:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) 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 22 [2021-06-05 14:08:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:45,521 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 14:08:45,521 INFO L226 Difference]: Without dead ends: 2569 [2021-06-05 14:08:45,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:08:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-05 14:08:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2556. [2021-06-05 14:08:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9279843444227005) internal successors, (7481), 2555 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7481 transitions. [2021-06-05 14:08:45,545 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7481 transitions. Word has length 22 [2021-06-05 14:08:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:45,545 INFO L482 AbstractCegarLoop]: Abstraction has 2556 states and 7481 transitions. [2021-06-05 14:08:45,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) 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 14:08:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7481 transitions. [2021-06-05 14:08:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:45,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:45,548 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:45,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34971,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:45,748 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1175859209, now seen corresponding path program 422 times [2021-06-05 14:08:45,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:45,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428648171] [2021-06-05 14:08:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:45,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:45,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428648171] [2021-06-05 14:08:45,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428648171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:45,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627941674] [2021-06-05 14:08:45,855 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 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 14:08:45,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:45,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:45,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:46,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:46,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:47,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:47,291 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:08:47,291 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:08:47,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:08:48,207 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 187 [2021-06-05 14:08:48,348 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 224 [2021-06-05 14:08:48,509 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 224 [2021-06-05 14:08:48,674 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 232 [2021-06-05 14:08:48,826 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 225 [2021-06-05 14:08:49,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:08:49,286 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:08:49,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:49,286 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:08:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:49,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627941674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:49,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:49,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:08:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768613565] [2021-06-05 14:08:49,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:08:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:08:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:49,313 INFO L87 Difference]: Start difference. First operand 2556 states and 7481 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:08:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:50,122 INFO L93 Difference]: Finished difference Result 3029 states and 8704 transitions. [2021-06-05 14:08:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:08:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:08:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:50,125 INFO L225 Difference]: With dead ends: 3029 [2021-06-05 14:08:50,125 INFO L226 Difference]: Without dead ends: 3019 [2021-06-05 14:08:50,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 765.5ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:08:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-06-05 14:08:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2564. [2021-06-05 14:08:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.928209129925868) internal successors, (7505), 2563 states have internal predecessors, (7505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7505 transitions. [2021-06-05 14:08:50,150 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7505 transitions. Word has length 22 [2021-06-05 14:08:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:50,151 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7505 transitions. [2021-06-05 14:08:50,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:08:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7505 transitions. [2021-06-05 14:08:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:08:50,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:50,153 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:50,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35184,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:50,353 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2066719163, now seen corresponding path program 423 times [2021-06-05 14:08:50,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:50,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354322398] [2021-06-05 14:08:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:50,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354322398] [2021-06-05 14:08:50,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354322398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580185632] [2021-06-05 14:08:50,451 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 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 14:08:50,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:08:50,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:50,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:08:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:50,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:51,501 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 287 [2021-06-05 14:08:51,640 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 287 [2021-06-05 14:08:51,780 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 298 [2021-06-05 14:08:51,983 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 400 [2021-06-05 14:08:52,109 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 304 [2021-06-05 14:08:53,350 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 311 [2021-06-05 14:08:53,587 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 346 [2021-06-05 14:08:54,519 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 280 [2021-06-05 14:08:54,669 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 295 [2021-06-05 14:08:54,866 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 361 [2021-06-05 14:08:55,653 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 224 [2021-06-05 14:08:55,986 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 717 DAG size of output: 481 [2021-06-05 14:08:56,641 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 722 [2021-06-05 14:08:57,298 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 722 [2021-06-05 14:08:58,010 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 1178 DAG size of output: 727 [2021-06-05 14:08:58,198 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 345 [2021-06-05 14:08:58,880 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 340 [2021-06-05 14:08:59,311 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 307 [2021-06-05 14:08:59,456 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 307 [2021-06-05 14:08:59,617 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 309 [2021-06-05 14:08:59,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:59,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:59,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:59,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:59,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580185632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:59,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:59,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:08:59,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974184310] [2021-06-05 14:08:59,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:08:59,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:08:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:59,838 INFO L87 Difference]: Start difference. First operand 2564 states and 7505 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:09:00,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:00,148 INFO L93 Difference]: Finished difference Result 2711 states and 7924 transitions. [2021-06-05 14:09:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:00,148 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:09:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:00,151 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 14:09:00,151 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 14:09:00,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 340.9ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:09:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 14:09:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2645. [2021-06-05 14:09:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.9436459909228443) internal successors, (7783), 2644 states have internal predecessors, (7783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7783 transitions. [2021-06-05 14:09:00,176 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7783 transitions. Word has length 22 [2021-06-05 14:09:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:00,176 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 7783 transitions. [2021-06-05 14:09:00,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:09:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7783 transitions. [2021-06-05 14:09:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:00,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:00,178 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:00,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35559,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:00,378 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:00,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1369373603, now seen corresponding path program 424 times [2021-06-05 14:09:00,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:00,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300790216] [2021-06-05 14:09:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:00,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:00,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300790216] [2021-06-05 14:09:00,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300790216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:00,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153863880] [2021-06-05 14:09:00,467 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 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 14:09:00,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:00,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:00,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:09:00,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:00,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:00,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:01,526 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 327 [2021-06-05 14:09:01,659 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 269 [2021-06-05 14:09:02,458 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 207 [2021-06-05 14:09:02,649 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 279 [2021-06-05 14:09:02,913 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 423 [2021-06-05 14:09:03,173 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 423 [2021-06-05 14:09:03,462 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 428 [2021-06-05 14:09:03,670 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 416 [2021-06-05 14:09:05,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:05,340 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:09:05,341 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:09:05,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:09:07,117 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 209 [2021-06-05 14:09:07,324 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 295 [2021-06-05 14:09:07,594 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 305 [2021-06-05 14:09:07,849 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 305 [2021-06-05 14:09:08,147 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 310 [2021-06-05 14:09:08,518 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 414 [2021-06-05 14:09:09,295 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 209 [2021-06-05 14:09:09,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:09:09,875 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:09:09,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:09:09,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:09:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:09,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153863880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:09,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:09,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:09:09,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694199199] [2021-06-05 14:09:09,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:09:09,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:09:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:09,901 INFO L87 Difference]: Start difference. First operand 2645 states and 7783 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:09:10,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:10,920 INFO L93 Difference]: Finished difference Result 2975 states and 8581 transitions. [2021-06-05 14:09:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:09:10,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:09:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:10,924 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 14:09:10,924 INFO L226 Difference]: Without dead ends: 2942 [2021-06-05 14:09:10,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 727.4ms TimeCoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:09:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-05 14:09:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2661. [2021-06-05 14:09:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.946240601503759) internal successors, (7837), 2660 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7837 transitions. [2021-06-05 14:09:10,950 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7837 transitions. Word has length 22 [2021-06-05 14:09:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:10,950 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7837 transitions. [2021-06-05 14:09:10,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:09:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7837 transitions. [2021-06-05 14:09:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:10,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:10,952 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:11,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36369 [2021-06-05 14:09:11,153 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:11,153 INFO L82 PathProgramCache]: Analyzing trace with hash 341239705, now seen corresponding path program 425 times [2021-06-05 14:09:11,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:11,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726577100] [2021-06-05 14:09:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:11,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:11,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726577100] [2021-06-05 14:09:11,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726577100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:11,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119039457] [2021-06-05 14:09:11,241 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 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 14:09:11,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:09:11,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:11,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:09:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:11,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:11,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:12,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:12,844 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:09:12,845 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:09:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:09:13,409 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 188 [2021-06-05 14:09:15,064 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 277 [2021-06-05 14:09:15,288 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 319 [2021-06-05 14:09:15,631 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 401 [2021-06-05 14:09:16,050 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 444 [2021-06-05 14:09:16,470 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 444 [2021-06-05 14:09:16,971 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 447 [2021-06-05 14:09:17,248 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 298 [2021-06-05 14:09:17,384 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 226 [2021-06-05 14:09:17,936 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 197 [2021-06-05 14:09:18,644 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 287 [2021-06-05 14:09:18,842 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 287 [2021-06-05 14:09:19,063 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 290 [2021-06-05 14:09:19,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:09:19,320 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:09:19,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:09:19,321 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:09:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:19,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119039457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:19,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:19,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:09:19,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332626453] [2021-06-05 14:09:19,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:09:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:19,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:09:19,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:19,347 INFO L87 Difference]: Start difference. First operand 2661 states and 7837 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:09:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:20,077 INFO L93 Difference]: Finished difference Result 2918 states and 8462 transitions. [2021-06-05 14:09:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:09:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:09:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:20,080 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 14:09:20,080 INFO L226 Difference]: Without dead ends: 2908 [2021-06-05 14:09:20,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:09:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-06-05 14:09:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2687. [2021-06-05 14:09:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.948994787788533) internal successors, (7921), 2686 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7921 transitions. [2021-06-05 14:09:20,106 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7921 transitions. Word has length 22 [2021-06-05 14:09:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:20,106 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7921 transitions. [2021-06-05 14:09:20,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:09:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7921 transitions. [2021-06-05 14:09:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:20,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:20,108 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:20,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37154,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:20,309 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1830644701, now seen corresponding path program 426 times [2021-06-05 14:09:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:20,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875193949] [2021-06-05 14:09:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:20,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:20,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875193949] [2021-06-05 14:09:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875193949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708139789] [2021-06-05 14:09:20,409 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 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 14:09:20,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:20,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:20,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:09:20,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:20,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:20,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:21,440 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 268 [2021-06-05 14:09:21,707 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 328 [2021-06-05 14:09:22,293 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 261 [2021-06-05 14:09:22,476 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 358 [2021-06-05 14:09:22,659 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 358 [2021-06-05 14:09:22,861 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 363 [2021-06-05 14:09:23,027 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 362 [2021-06-05 14:09:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:23,613 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:09:23,614 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:09:23,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:09:24,984 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 272 [2021-06-05 14:09:25,154 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 311 [2021-06-05 14:09:26,123 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 293 [2021-06-05 14:09:26,332 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 348 [2021-06-05 14:09:26,676 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 823 DAG size of output: 494 [2021-06-05 14:09:27,202 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 553 [2021-06-05 14:09:27,711 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 553 [2021-06-05 14:09:28,300 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 558 [2021-06-05 14:09:28,865 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 635 [2021-06-05 14:09:29,520 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 283 [2021-06-05 14:09:29,740 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-06-05 14:09:30,116 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 261 [2021-06-05 14:09:30,573 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 343 [2021-06-05 14:09:30,744 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 343 [2021-06-05 14:09:30,943 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 336 [2021-06-05 14:09:31,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:09:31,129 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:09:31,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:09:31,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:09:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:31,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708139789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:31,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:31,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:09:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192224439] [2021-06-05 14:09:31,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:09:31,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:09:31,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:31,155 INFO L87 Difference]: Start difference. First operand 2687 states and 7921 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:09:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:32,011 INFO L93 Difference]: Finished difference Result 3155 states and 9023 transitions. [2021-06-05 14:09:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 14:09:32,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:09:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:32,014 INFO L225 Difference]: With dead ends: 3155 [2021-06-05 14:09:32,014 INFO L226 Difference]: Without dead ends: 3121 [2021-06-05 14:09:32,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 736.2ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:09:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-06-05 14:09:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2693. [2021-06-05 14:09:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.947251114413076) internal successors, (7934), 2692 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7934 transitions. [2021-06-05 14:09:32,041 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7934 transitions. Word has length 22 [2021-06-05 14:09:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:32,041 INFO L482 AbstractCegarLoop]: Abstraction has 2693 states and 7934 transitions. [2021-06-05 14:09:32,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:09:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7934 transitions. [2021-06-05 14:09:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:32,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:32,044 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:32,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37964 [2021-06-05 14:09:32,244 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash 757559321, now seen corresponding path program 427 times [2021-06-05 14:09:32,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:32,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498093073] [2021-06-05 14:09:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:32,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:32,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498093073] [2021-06-05 14:09:32,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498093073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:32,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618665946] [2021-06-05 14:09:32,342 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 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 14:09:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:32,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:09:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:32,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:33,334 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 300 [2021-06-05 14:09:33,448 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 300 [2021-06-05 14:09:33,601 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 311 [2021-06-05 14:09:33,798 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 404 [2021-06-05 14:09:33,949 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 315 [2021-06-05 14:09:34,076 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 223 [2021-06-05 14:09:35,403 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 224 [2021-06-05 14:09:35,596 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 277 [2021-06-05 14:09:35,856 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 390 [2021-06-05 14:09:36,252 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 458 [2021-06-05 14:09:36,669 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 458 [2021-06-05 14:09:37,108 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 465 [2021-06-05 14:09:37,321 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 353 [2021-06-05 14:09:37,527 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 326 [2021-06-05 14:09:38,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:38,538 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:09:38,538 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:09:38,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:09:39,630 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 209 [2021-06-05 14:09:40,283 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 214 [2021-06-05 14:09:40,534 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 313 [2021-06-05 14:09:40,784 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 313 [2021-06-05 14:09:41,059 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 317 [2021-06-05 14:09:41,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:09:41,709 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:09:41,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:09:41,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:09:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618665946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:41,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:41,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:09:41,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170844969] [2021-06-05 14:09:41,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:09:41,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:41,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:09:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:41,735 INFO L87 Difference]: Start difference. First operand 2693 states and 7934 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:09:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:42,386 INFO L93 Difference]: Finished difference Result 2902 states and 8407 transitions. [2021-06-05 14:09:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:09:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:09:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:42,389 INFO L225 Difference]: With dead ends: 2902 [2021-06-05 14:09:42,389 INFO L226 Difference]: Without dead ends: 2887 [2021-06-05 14:09:42,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:09:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-06-05 14:09:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2699. [2021-06-05 14:09:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946256486286138) internal successors, (7949), 2698 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7949 transitions. [2021-06-05 14:09:42,415 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7949 transitions. Word has length 22 [2021-06-05 14:09:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:42,415 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7949 transitions. [2021-06-05 14:09:42,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:09:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7949 transitions. [2021-06-05 14:09:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:42,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:42,417 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:42,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38902 [2021-06-05 14:09:42,618 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1851650909, now seen corresponding path program 428 times [2021-06-05 14:09:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:42,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598885209] [2021-06-05 14:09:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:42,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:42,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598885209] [2021-06-05 14:09:42,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598885209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:42,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302216881] [2021-06-05 14:09:42,724 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 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 14:09:42,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:42,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:09:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:43,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:43,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:43,653 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 219 [2021-06-05 14:09:43,883 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 161 [2021-06-05 14:09:44,825 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 268 [2021-06-05 14:09:44,973 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 268 [2021-06-05 14:09:45,159 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 275 [2021-06-05 14:09:45,367 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 314 [2021-06-05 14:09:45,597 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 216 [2021-06-05 14:09:46,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:46,649 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:09:46,650 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:09:46,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:09:47,209 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 237 [2021-06-05 14:09:47,326 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 219 [2021-06-05 14:09:48,654 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 319 [2021-06-05 14:09:49,850 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 334 [2021-06-05 14:09:50,196 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 474 [2021-06-05 14:09:50,659 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 741 DAG size of output: 524 [2021-06-05 14:09:51,277 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 810 DAG size of output: 571 [2021-06-05 14:09:51,917 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 829 DAG size of output: 585 [2021-06-05 14:09:52,727 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 921 DAG size of output: 667 [2021-06-05 14:09:53,670 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 676 [2021-06-05 14:09:54,610 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 676 [2021-06-05 14:09:55,677 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 937 DAG size of output: 682 [2021-06-05 14:09:56,483 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 504 [2021-06-05 14:09:57,032 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 414 [2021-06-05 14:09:57,250 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 249 [2021-06-05 14:09:57,663 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 239 [2021-06-05 14:09:57,835 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 239 [2021-06-05 14:09:58,019 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 243 [2021-06-05 14:09:58,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:09:58,508 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:09:58,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:09:58,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:09:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:58,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302216881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:58,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:58,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:09:58,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355771981] [2021-06-05 14:09:58,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:09:58,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:09:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:58,535 INFO L87 Difference]: Start difference. First operand 2699 states and 7949 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:09:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:59,269 INFO L93 Difference]: Finished difference Result 2977 states and 8602 transitions. [2021-06-05 14:09:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:09:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:09:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:59,272 INFO L225 Difference]: With dead ends: 2977 [2021-06-05 14:09:59,272 INFO L226 Difference]: Without dead ends: 2962 [2021-06-05 14:09:59,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:09:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-06-05 14:09:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2699. [2021-06-05 14:09:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-06-05 14:09:59,299 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-06-05 14:09:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:59,299 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-06-05 14:09:59,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:09:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-06-05 14:09:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:09:59,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:59,301 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:59,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:59,502 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1408751769, now seen corresponding path program 429 times [2021-06-05 14:09:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022358912] [2021-06-05 14:09:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:59,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:59,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022358912] [2021-06-05 14:09:59,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022358912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:59,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941581764] [2021-06-05 14:09:59,612 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 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 14:09:59,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:59,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:59,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:09:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:00,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:00,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:00,698 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 307 [2021-06-05 14:10:00,841 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 307 [2021-06-05 14:10:01,029 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-06-05 14:10:01,471 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 310 [2021-06-05 14:10:02,023 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 275 [2021-06-05 14:10:02,243 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 311 [2021-06-05 14:10:02,405 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 269 [2021-06-05 14:10:03,305 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 222 [2021-06-05 14:10:03,410 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 245 [2021-06-05 14:10:03,541 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 286 [2021-06-05 14:10:03,660 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 261 [2021-06-05 14:10:03,766 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 179 [2021-06-05 14:10:03,910 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 241 [2021-06-05 14:10:04,232 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 205 [2021-06-05 14:10:04,882 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 749 DAG size of output: 410 [2021-06-05 14:10:05,223 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 431 [2021-06-05 14:10:05,639 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 925 DAG size of output: 450 [2021-06-05 14:10:06,115 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 459 [2021-06-05 14:10:06,606 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 459 [2021-06-05 14:10:07,113 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 945 DAG size of output: 466 [2021-06-05 14:10:07,482 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 449 [2021-06-05 14:10:07,783 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 383 [2021-06-05 14:10:08,132 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 302 [2021-06-05 14:10:08,292 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 299 [2021-06-05 14:10:09,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:09,240 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:10:09,241 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:10:09,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:10:10,350 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 271 [2021-06-05 14:10:10,482 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 271 [2021-06-05 14:10:10,634 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 276 [2021-06-05 14:10:11,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:10:11,500 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:10:11,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:10:11,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:10:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:11,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941581764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:11,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:11,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:10:11,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799850802] [2021-06-05 14:10:11,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:10:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:11,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:10:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:11,527 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:10:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:12,223 INFO L93 Difference]: Finished difference Result 2918 states and 8461 transitions. [2021-06-05 14:10:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:10:12,223 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:10:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:12,226 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 14:10:12,226 INFO L226 Difference]: Without dead ends: 2908 [2021-06-05 14:10:12,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 711.5ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:10:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-06-05 14:10:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2699. [2021-06-05 14:10:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-06-05 14:10:12,252 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-06-05 14:10:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:12,252 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-06-05 14:10:12,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:10:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-06-05 14:10:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:12,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:12,254 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:12,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40803,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:12,455 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:12,455 INFO L82 PathProgramCache]: Analyzing trace with hash 998887215, now seen corresponding path program 430 times [2021-06-05 14:10:12,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:12,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162023583] [2021-06-05 14:10:12,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:12,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:12,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162023583] [2021-06-05 14:10:12,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162023583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:12,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520615117] [2021-06-05 14:10:12,556 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 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 14:10:12,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:12,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:12,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:10:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:12,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:13,568 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 319 [2021-06-05 14:10:13,680 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 319 [2021-06-05 14:10:13,807 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 326 [2021-06-05 14:10:13,948 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 355 [2021-06-05 14:10:14,277 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 331 [2021-06-05 14:10:15,031 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 269 [2021-06-05 14:10:15,263 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 286 [2021-06-05 14:10:15,803 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 216 [2021-06-05 14:10:16,418 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 268 [2021-06-05 14:10:16,547 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 268 [2021-06-05 14:10:16,691 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 272 [2021-06-05 14:10:16,796 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 257 [2021-06-05 14:10:17,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:17,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:17,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:17,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:17,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520615117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:17,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:17,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:10:17,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068551289] [2021-06-05 14:10:17,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:10:17,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:10:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:10:17,074 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) 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 14:10:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:17,437 INFO L93 Difference]: Finished difference Result 2738 states and 8012 transitions. [2021-06-05 14:10:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) 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 22 [2021-06-05 14:10:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:17,440 INFO L225 Difference]: With dead ends: 2738 [2021-06-05 14:10:17,440 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 14:10:17,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:10:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 14:10:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2699. [2021-06-05 14:10:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946997776130467) internal successors, (7951), 2698 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7951 transitions. [2021-06-05 14:10:17,466 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7951 transitions. Word has length 22 [2021-06-05 14:10:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:17,466 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7951 transitions. [2021-06-05 14:10:17,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3103448275862069) 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 14:10:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7951 transitions. [2021-06-05 14:10:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:17,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:17,468 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:17,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41603,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:17,669 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1502482099, now seen corresponding path program 431 times [2021-06-05 14:10:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:17,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703980574] [2021-06-05 14:10:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:17,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703980574] [2021-06-05 14:10:17,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703980574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314485003] [2021-06-05 14:10:17,773 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 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 14:10:17,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:17,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:10:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:18,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:18,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:18,893 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 260 [2021-06-05 14:10:19,106 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 238 [2021-06-05 14:10:19,244 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 280 [2021-06-05 14:10:19,961 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 216 [2021-06-05 14:10:20,108 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 216 [2021-06-05 14:10:20,250 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 223 [2021-06-05 14:10:20,408 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 212 [2021-06-05 14:10:21,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:21,407 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:10:21,407 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:10:21,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:10:22,937 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 246 [2021-06-05 14:10:23,138 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 275 [2021-06-05 14:10:23,323 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 308 [2021-06-05 14:10:23,508 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 308 [2021-06-05 14:10:23,714 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 299 [2021-06-05 14:10:23,981 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 368 [2021-06-05 14:10:24,290 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 273 [2021-06-05 14:10:24,459 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 199 [2021-06-05 14:10:25,073 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 197 [2021-06-05 14:10:25,306 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 275 [2021-06-05 14:10:25,537 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 275 [2021-06-05 14:10:25,765 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 264 [2021-06-05 14:10:26,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:10:26,079 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:10:26,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:10:26,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:10:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314485003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:26,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:10:26,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829282116] [2021-06-05 14:10:26,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:10:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:10:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:26,105 INFO L87 Difference]: Start difference. First operand 2699 states and 7951 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:10:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:26,866 INFO L93 Difference]: Finished difference Result 3366 states and 9748 transitions. [2021-06-05 14:10:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:10:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:10:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:26,870 INFO L225 Difference]: With dead ends: 3366 [2021-06-05 14:10:26,870 INFO L226 Difference]: Without dead ends: 3356 [2021-06-05 14:10:26,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:10:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-05 14:10:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2699. [2021-06-05 14:10:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9458858413639732) internal successors, (7948), 2698 states have internal predecessors, (7948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7948 transitions. [2021-06-05 14:10:26,898 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7948 transitions. Word has length 22 [2021-06-05 14:10:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:26,898 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7948 transitions. [2021-06-05 14:10:26,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:10:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7948 transitions. [2021-06-05 14:10:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:26,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:26,900 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:27,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42037 [2021-06-05 14:10:27,101 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:27,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:27,101 INFO L82 PathProgramCache]: Analyzing trace with hash 14616815, now seen corresponding path program 432 times [2021-06-05 14:10:27,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:27,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067048451] [2021-06-05 14:10:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:27,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067048451] [2021-06-05 14:10:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067048451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438315393] [2021-06-05 14:10:27,182 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 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 14:10:27,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:27,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:10:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:27,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:27,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:29,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:29,290 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:10:29,290 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:10:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:10:30,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:10:30,475 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:10:30,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:10:30,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:10:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:30,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438315393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:30,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:30,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:10:30,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229129283] [2021-06-05 14:10:30,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:10:30,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:10:30,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:30,500 INFO L87 Difference]: Start difference. First operand 2699 states and 7948 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:10:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:31,330 INFO L93 Difference]: Finished difference Result 3100 states and 8894 transitions. [2021-06-05 14:10:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:10:31,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:10:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:31,334 INFO L225 Difference]: With dead ends: 3100 [2021-06-05 14:10:31,334 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 14:10:31,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 612.1ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:10:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 14:10:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2707. [2021-06-05 14:10:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.9464153732446414) internal successors, (7973), 2706 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 7973 transitions. [2021-06-05 14:10:31,360 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 7973 transitions. Word has length 22 [2021-06-05 14:10:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:31,361 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 7973 transitions. [2021-06-05 14:10:31,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:10:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 7973 transitions. [2021-06-05 14:10:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:31,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:31,363 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:31,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42908 [2021-06-05 14:10:31,563 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1504021811, now seen corresponding path program 433 times [2021-06-05 14:10:31,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:31,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694648538] [2021-06-05 14:10:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:31,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:31,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694648538] [2021-06-05 14:10:31,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694648538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:31,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916389155] [2021-06-05 14:10:31,658 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 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 14:10:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:31,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:10:31,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:32,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:32,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:32,998 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 387 [2021-06-05 14:10:33,174 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 387 [2021-06-05 14:10:33,406 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 398 [2021-06-05 14:10:33,824 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 535 [2021-06-05 14:10:34,254 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 443 [2021-06-05 14:10:34,528 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 424 [2021-06-05 14:10:34,809 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 434 [2021-06-05 14:10:35,068 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 322 [2021-06-05 14:10:35,249 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 347 [2021-06-05 14:10:35,687 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 331 [2021-06-05 14:10:36,001 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 339 [2021-06-05 14:10:36,489 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 728 DAG size of output: 386 [2021-06-05 14:10:36,854 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 413 [2021-06-05 14:10:37,103 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 319 [2021-06-05 14:10:37,272 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 323 [2021-06-05 14:10:37,742 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 340 [2021-06-05 14:10:37,856 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 194 [2021-06-05 14:10:38,348 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 396 [2021-06-05 14:10:38,734 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 1172 DAG size of output: 590 [2021-06-05 14:10:39,207 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 1265 DAG size of output: 649 [2021-06-05 14:10:39,817 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 671 [2021-06-05 14:10:40,400 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 671 [2021-06-05 14:10:41,052 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 1435 DAG size of output: 676 [2021-06-05 14:10:41,527 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 678 DAG size of output: 587 [2021-06-05 14:10:42,256 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 257 [2021-06-05 14:10:42,464 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 260 [2021-06-05 14:10:42,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:42,926 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:10:42,927 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:10:42,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:10:44,713 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 262 [2021-06-05 14:10:45,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:10:45,999 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:10:45,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:10:45,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:10:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:46,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916389155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:46,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:46,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:10:46,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766748620] [2021-06-05 14:10:46,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:10:46,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:10:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:10:46,025 INFO L87 Difference]: Start difference. First operand 2707 states and 7973 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:10:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:46,978 INFO L93 Difference]: Finished difference Result 3336 states and 9435 transitions. [2021-06-05 14:10:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:10:46,978 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:10:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:46,982 INFO L225 Difference]: With dead ends: 3336 [2021-06-05 14:10:46,982 INFO L226 Difference]: Without dead ends: 3288 [2021-06-05 14:10:46,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=410, Invalid=3250, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 14:10:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-06-05 14:10:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2710. [2021-06-05 14:10:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.9427833148763383) internal successors, (7972), 2709 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 7972 transitions. [2021-06-05 14:10:47,010 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 7972 transitions. Word has length 22 [2021-06-05 14:10:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:47,010 INFO L482 AbstractCegarLoop]: Abstraction has 2710 states and 7972 transitions. [2021-06-05 14:10:47,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:10:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 7972 transitions. [2021-06-05 14:10:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:47,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:47,012 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:47,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43363 [2021-06-05 14:10:47,213 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash 430936431, now seen corresponding path program 434 times [2021-06-05 14:10:47,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:47,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288106429] [2021-06-05 14:10:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:47,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:47,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288106429] [2021-06-05 14:10:47,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288106429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:47,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812796586] [2021-06-05 14:10:47,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:10:47,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:47,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:47,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:10:47,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:47,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:47,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:48,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:49,125 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:10:49,125 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:10:49,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:10:49,609 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 260 [2021-06-05 14:10:49,798 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 269 [2021-06-05 14:10:49,903 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 272 [2021-06-05 14:10:50,095 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 298 [2021-06-05 14:10:51,302 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 268 [2021-06-05 14:10:51,508 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 329 [2021-06-05 14:10:51,748 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 354 [2021-06-05 14:10:51,984 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 354 [2021-06-05 14:10:52,254 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 355 [2021-06-05 14:10:52,478 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 320 [2021-06-05 14:10:52,624 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 262 [2021-06-05 14:10:53,407 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 234 [2021-06-05 14:10:53,521 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 234 [2021-06-05 14:10:53,656 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 237 [2021-06-05 14:10:54,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:10:54,035 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:10:54,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:10:54,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:10:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812796586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:54,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:10:54,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465081642] [2021-06-05 14:10:54,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:10:54,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:10:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:10:54,061 INFO L87 Difference]: Start difference. First operand 2710 states and 7972 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:10:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:54,713 INFO L93 Difference]: Finished difference Result 3007 states and 8651 transitions. [2021-06-05 14:10:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:10:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:10:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:54,716 INFO L225 Difference]: With dead ends: 3007 [2021-06-05 14:10:54,716 INFO L226 Difference]: Without dead ends: 2992 [2021-06-05 14:10:54,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:10:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-06-05 14:10:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2729. [2021-06-05 14:10:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 2.941348973607038) internal successors, (8024), 2728 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 8024 transitions. [2021-06-05 14:10:54,743 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 8024 transitions. Word has length 22 [2021-06-05 14:10:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:54,743 INFO L482 AbstractCegarLoop]: Abstraction has 2729 states and 8024 transitions. [2021-06-05 14:10:54,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:10:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 8024 transitions. [2021-06-05 14:10:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:10:54,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:54,745 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:54,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44331,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:54,946 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1525028019, now seen corresponding path program 435 times [2021-06-05 14:10:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:54,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934052952] [2021-06-05 14:10:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:55,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934052952] [2021-06-05 14:10:55,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934052952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670626194] [2021-06-05 14:10:55,050 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 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 14:10:55,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:55,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:55,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 14:10:55,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:55,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:55,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:55,954 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 259 [2021-06-05 14:10:56,058 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 259 [2021-06-05 14:10:56,187 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 272 [2021-06-05 14:10:56,349 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 298 [2021-06-05 14:10:56,537 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 233 [2021-06-05 14:10:57,535 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 243 [2021-06-05 14:10:57,721 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 254 [2021-06-05 14:10:57,877 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 210 [2021-06-05 14:10:58,008 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 215 [2021-06-05 14:10:58,983 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 176 [2021-06-05 14:10:59,351 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 312 [2021-06-05 14:10:59,787 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 349 [2021-06-05 14:11:00,037 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 292 [2021-06-05 14:11:00,183 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 226 [2021-06-05 14:11:00,355 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 214 [2021-06-05 14:11:00,808 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 246 [2021-06-05 14:11:01,421 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 252 [2021-06-05 14:11:01,595 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 325 [2021-06-05 14:11:01,983 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 436 [2021-06-05 14:11:03,063 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 246 [2021-06-05 14:11:03,307 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 313 [2021-06-05 14:11:03,613 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 329 [2021-06-05 14:11:04,297 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 544 [2021-06-05 14:11:05,151 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 642 [2021-06-05 14:11:06,617 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1450 DAG size of output: 807 [2021-06-05 14:11:08,051 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1450 DAG size of output: 807 [2021-06-05 14:11:09,610 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 1455 DAG size of output: 812 [2021-06-05 14:11:10,927 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 814 DAG size of output: 899 [2021-06-05 14:11:11,471 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 460 [2021-06-05 14:11:12,509 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 256 [2021-06-05 14:11:13,237 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 254 [2021-06-05 14:11:13,349 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 264 [2021-06-05 14:11:14,190 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 400 [2021-06-05 14:11:14,544 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 534 [2021-06-05 14:11:14,884 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 534 [2021-06-05 14:11:15,255 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 994 DAG size of output: 538 [2021-06-05 14:11:15,471 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 377 [2021-06-05 14:11:15,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:11:16,049 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:11:16,050 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:11:16,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:11:17,266 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 255 [2021-06-05 14:11:17,417 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 277 [2021-06-05 14:11:17,638 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 307 [2021-06-05 14:11:17,886 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 338 [2021-06-05 14:11:18,135 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 338 [2021-06-05 14:11:18,415 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 342 [2021-06-05 14:11:18,598 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 239 [2021-06-05 14:11:18,764 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 242 [2021-06-05 14:11:19,708 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 208 [2021-06-05 14:11:19,811 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 208 [2021-06-05 14:11:19,931 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 211 [2021-06-05 14:11:20,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:11:20,219 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:11:20,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:11:20,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:11:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:20,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670626194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:20,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:20,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:11:20,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667511748] [2021-06-05 14:11:20,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:11:20,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:20,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:11:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:20,246 INFO L87 Difference]: Start difference. First operand 2729 states and 8024 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:11:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:21,058 INFO L93 Difference]: Finished difference Result 3110 states and 8920 transitions. [2021-06-05 14:11:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:11:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:11:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:21,062 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 14:11:21,062 INFO L226 Difference]: Without dead ends: 3095 [2021-06-05 14:11:21,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:11:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-06-05 14:11:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2732. [2021-06-05 14:11:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 2.943610399121201) internal successors, (8039), 2731 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 8039 transitions. [2021-06-05 14:11:21,090 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 8039 transitions. Word has length 22 [2021-06-05 14:11:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:21,090 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 8039 transitions. [2021-06-05 14:11:21,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:11:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 8039 transitions. [2021-06-05 14:11:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:21,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:21,092 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:21,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45017,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:21,293 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1082128879, now seen corresponding path program 436 times [2021-06-05 14:11:21,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:21,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020805554] [2021-06-05 14:11:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:21,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:21,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020805554] [2021-06-05 14:11:21,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020805554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:21,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741765676] [2021-06-05 14:11:21,397 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 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 14:11:21,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:21,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:21,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:11:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:21,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:21,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:11:22,476 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 298 [2021-06-05 14:11:22,618 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 299 [2021-06-05 14:11:22,743 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 299 [2021-06-05 14:11:22,883 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 307 [2021-06-05 14:11:23,048 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 313 [2021-06-05 14:11:23,953 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 236 [2021-06-05 14:11:24,098 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 236 [2021-06-05 14:11:24,261 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 241 [2021-06-05 14:11:24,384 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 230 [2021-06-05 14:11:25,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:11:25,344 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:11:25,344 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:11:25,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:11:26,103 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 272 [2021-06-05 14:11:28,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:11:28,108 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:11:28,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:11:28,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:11:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741765676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:28,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:11:28,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654523320] [2021-06-05 14:11:28,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:11:28,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:11:28,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:28,134 INFO L87 Difference]: Start difference. First operand 2732 states and 8039 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:11:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:28,823 INFO L93 Difference]: Finished difference Result 3038 states and 8759 transitions. [2021-06-05 14:11:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:11:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:11:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:28,826 INFO L225 Difference]: With dead ends: 3038 [2021-06-05 14:11:28,826 INFO L226 Difference]: Without dead ends: 3028 [2021-06-05 14:11:28,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:11:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-06-05 14:11:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2734. [2021-06-05 14:11:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.9425539699963412) internal successors, (8042), 2733 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 8042 transitions. [2021-06-05 14:11:28,854 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 8042 transitions. Word has length 22 [2021-06-05 14:11:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:28,854 INFO L482 AbstractCegarLoop]: Abstraction has 2734 states and 8042 transitions. [2021-06-05 14:11:28,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:11:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 8042 transitions. [2021-06-05 14:11:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:28,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:28,856 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:29,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46562,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:29,057 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1328354231, now seen corresponding path program 437 times [2021-06-05 14:11:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:29,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101109807] [2021-06-05 14:11:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:29,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:29,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101109807] [2021-06-05 14:11:29,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101109807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:29,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031528719] [2021-06-05 14:11:29,181 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 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 14:11:29,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:29,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:11:29,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:29,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:29,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:11:30,089 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 269 [2021-06-05 14:11:30,193 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 269 [2021-06-05 14:11:30,321 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 280 [2021-06-05 14:11:30,641 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 283 [2021-06-05 14:11:30,974 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 224 [2021-06-05 14:11:31,079 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 221 [2021-06-05 14:11:31,837 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 228 [2021-06-05 14:11:32,554 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 227 [2021-06-05 14:11:32,771 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 273 [2021-06-05 14:11:32,989 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 273 [2021-06-05 14:11:33,241 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 278 [2021-06-05 14:11:33,459 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 359 [2021-06-05 14:11:34,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:11:34,433 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:11:34,433 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:11:34,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:11:35,200 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 290 [2021-06-05 14:11:35,384 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 268 [2021-06-05 14:11:35,609 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 226 [2021-06-05 14:11:36,438 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 265 [2021-06-05 14:11:36,572 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 280 [2021-06-05 14:11:37,461 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 406 [2021-06-05 14:11:37,794 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 415 [2021-06-05 14:11:38,976 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 307 [2021-06-05 14:11:39,194 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 310 [2021-06-05 14:11:39,752 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 566 [2021-06-05 14:11:40,723 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 641 [2021-06-05 14:11:41,614 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 878 DAG size of output: 675 [2021-06-05 14:11:42,697 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 960 DAG size of output: 732 [2021-06-05 14:11:43,776 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 960 DAG size of output: 732 [2021-06-05 14:11:45,044 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 967 DAG size of output: 721 [2021-06-05 14:11:46,099 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 721 [2021-06-05 14:11:46,958 WARN L205 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 692 [2021-06-05 14:11:47,859 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 214 [2021-06-05 14:11:48,055 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 224 [2021-06-05 14:11:48,268 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 244 [2021-06-05 14:11:48,719 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 226 [2021-06-05 14:11:49,267 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 196 [2021-06-05 14:11:49,425 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 220 [2021-06-05 14:11:49,736 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 321 [2021-06-05 14:11:50,119 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 870 DAG size of output: 377 [2021-06-05 14:11:50,479 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 870 DAG size of output: 377 [2021-06-05 14:11:50,702 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 283 [2021-06-05 14:11:50,805 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 232 [2021-06-05 14:11:51,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:11:51,171 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:11:51,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:11:51,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:11:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:51,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031528719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:51,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:51,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:11:51,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080247501] [2021-06-05 14:11:51,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:11:51,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:11:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:51,198 INFO L87 Difference]: Start difference. First operand 2734 states and 8042 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:11:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:52,293 INFO L93 Difference]: Finished difference Result 3510 states and 9948 transitions. [2021-06-05 14:11:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:11:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:11:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:52,297 INFO L225 Difference]: With dead ends: 3510 [2021-06-05 14:11:52,297 INFO L226 Difference]: Without dead ends: 3469 [2021-06-05 14:11:52,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 14:11:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-06-05 14:11:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2730. [2021-06-05 14:11:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 2.9399047270062293) internal successors, (8023), 2729 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 8023 transitions. [2021-06-05 14:11:52,328 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 8023 transitions. Word has length 22 [2021-06-05 14:11:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:52,328 INFO L482 AbstractCegarLoop]: Abstraction has 2730 states and 8023 transitions. [2021-06-05 14:11:52,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:11:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 8023 transitions. [2021-06-05 14:11:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:52,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:52,330 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:52,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47222,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:52,531 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:52,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:52,531 INFO L82 PathProgramCache]: Analyzing trace with hash -234262643, now seen corresponding path program 438 times [2021-06-05 14:11:52,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:52,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324805663] [2021-06-05 14:11:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:52,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:52,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324805663] [2021-06-05 14:11:52,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324805663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:52,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191016565] [2021-06-05 14:11:52,646 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 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 14:11:52,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:52,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:11:52,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:53,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:53,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:11:53,580 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 237 [2021-06-05 14:11:53,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 238 [2021-06-05 14:11:53,792 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 238 [2021-06-05 14:11:53,918 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 249 [2021-06-05 14:11:54,139 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 311 [2021-06-05 14:11:54,431 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 300 [2021-06-05 14:11:54,573 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 194 [2021-06-05 14:11:55,183 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 192 [2021-06-05 14:11:55,427 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-06-05 14:11:56,163 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 228 [2021-06-05 14:11:56,394 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 321 [2021-06-05 14:11:56,735 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 428 [2021-06-05 14:11:57,098 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 428 [2021-06-05 14:11:57,470 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 433 [2021-06-05 14:11:57,669 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 297 [2021-06-05 14:11:57,897 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 294 [2021-06-05 14:11:59,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:11:59,300 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:11:59,301 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:11:59,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:11:59,926 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 263 [2021-06-05 14:12:00,068 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 267 [2021-06-05 14:12:00,188 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 270 [2021-06-05 14:12:01,005 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 260 [2021-06-05 14:12:01,165 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 300 [2021-06-05 14:12:01,371 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 313 [2021-06-05 14:12:01,577 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 313 [2021-06-05 14:12:01,816 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 319 [2021-06-05 14:12:02,004 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 262 [2021-06-05 14:12:02,141 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 237 [2021-06-05 14:12:02,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:02,647 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:02,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:02,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:02,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191016565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:02,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:02,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:12:02,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842715662] [2021-06-05 14:12:02,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:12:02,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:02,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:12:02,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:12:02,674 INFO L87 Difference]: Start difference. First operand 2730 states and 8023 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:12:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:03,725 INFO L93 Difference]: Finished difference Result 3643 states and 10471 transitions. [2021-06-05 14:12:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:12:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:12:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:03,729 INFO L225 Difference]: With dead ends: 3643 [2021-06-05 14:12:03,729 INFO L226 Difference]: Without dead ends: 3610 [2021-06-05 14:12:03,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 911.2ms TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 14:12:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-06-05 14:12:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2622. [2021-06-05 14:12:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 2.9355207935902325) internal successors, (7694), 2621 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 7694 transitions. [2021-06-05 14:12:03,757 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 7694 transitions. Word has length 22 [2021-06-05 14:12:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:03,757 INFO L482 AbstractCegarLoop]: Abstraction has 2622 states and 7694 transitions. [2021-06-05 14:12:03,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:12:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 7694 transitions. [2021-06-05 14:12:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:03,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:03,759 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:03,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48430 [2021-06-05 14:12:03,960 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:03,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash -677161783, now seen corresponding path program 439 times [2021-06-05 14:12:03,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:03,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385142633] [2021-06-05 14:12:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:04,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385142633] [2021-06-05 14:12:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385142633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968478792] [2021-06-05 14:12:04,075 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 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 14:12:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:04,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:04,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:04,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:05,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:05,414 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:05,415 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:06,475 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 185 [2021-06-05 14:12:06,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:06,908 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:06,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:06,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968478792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:06,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:06,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:12:06,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540716810] [2021-06-05 14:12:06,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:12:06,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:12:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:12:06,936 INFO L87 Difference]: Start difference. First operand 2622 states and 7694 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:12:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:07,752 INFO L93 Difference]: Finished difference Result 3243 states and 9300 transitions. [2021-06-05 14:12:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:12:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:12:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:07,755 INFO L225 Difference]: With dead ends: 3243 [2021-06-05 14:12:07,755 INFO L226 Difference]: Without dead ends: 3233 [2021-06-05 14:12:07,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 765.8ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:12:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-06-05 14:12:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2624. [2021-06-05 14:12:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.9363324437666796) internal successors, (7702), 2623 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7702 transitions. [2021-06-05 14:12:07,781 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7702 transitions. Word has length 22 [2021-06-05 14:12:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:07,781 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 7702 transitions. [2021-06-05 14:12:07,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:12:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7702 transitions. [2021-06-05 14:12:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:07,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:07,784 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:07,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49313,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:07,984 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:07,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1067202223, now seen corresponding path program 440 times [2021-06-05 14:12:07,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:07,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641319760] [2021-06-05 14:12:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:08,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641319760] [2021-06-05 14:12:08,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641319760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181897652] [2021-06-05 14:12:08,100 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 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 14:12:08,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:08,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:08,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:08,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:08,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:09,040 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 198 [2021-06-05 14:12:10,132 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 251 [2021-06-05 14:12:10,333 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 304 [2021-06-05 14:12:10,533 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 304 [2021-06-05 14:12:10,765 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 309 [2021-06-05 14:12:10,891 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 243 [2021-06-05 14:12:11,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:11,577 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:11,577 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:11,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:12,156 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 246 [2021-06-05 14:12:12,754 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 199 [2021-06-05 14:12:12,935 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 202 [2021-06-05 14:12:13,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:13,409 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:13,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:13,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:13,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181897652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:13,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:13,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:12:13,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14604052] [2021-06-05 14:12:13,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:12:13,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:12:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:12:13,437 INFO L87 Difference]: Start difference. First operand 2624 states and 7702 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:12:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:14,368 INFO L93 Difference]: Finished difference Result 3200 states and 9255 transitions. [2021-06-05 14:12:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:12:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:12:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:14,372 INFO L225 Difference]: With dead ends: 3200 [2021-06-05 14:12:14,372 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 14:12:14,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:12:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 14:12:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2692. [2021-06-05 14:12:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.938684503901895) internal successors, (7908), 2691 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7908 transitions. [2021-06-05 14:12:14,398 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7908 transitions. Word has length 22 [2021-06-05 14:12:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:14,398 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 7908 transitions. [2021-06-05 14:12:14,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:12:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7908 transitions. [2021-06-05 14:12:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:14,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:14,400 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:14,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49659 [2021-06-05 14:12:14,605 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1088702763, now seen corresponding path program 441 times [2021-06-05 14:12:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:14,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032063222] [2021-06-05 14:12:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:14,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:14,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032063222] [2021-06-05 14:12:14,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032063222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:14,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427573651] [2021-06-05 14:12:14,690 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 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 14:12:14,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:12:14,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:14,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:15,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:15,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:15,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:15,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:15,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:12:15,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:12:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427573651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:15,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:15,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:12:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276962302] [2021-06-05 14:12:15,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:12:15,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:15,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:12:15,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:12:15,820 INFO L87 Difference]: Start difference. First operand 2692 states and 7908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:12:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:16,355 INFO L93 Difference]: Finished difference Result 2915 states and 8552 transitions. [2021-06-05 14:12:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:12:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:12:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:16,358 INFO L225 Difference]: With dead ends: 2915 [2021-06-05 14:12:16,358 INFO L226 Difference]: Without dead ends: 2897 [2021-06-05 14:12:16,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:12:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-05 14:12:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2847. [2021-06-05 14:12:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.95572733661279) internal successors, (8412), 2846 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8412 transitions. [2021-06-05 14:12:16,384 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8412 transitions. Word has length 22 [2021-06-05 14:12:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:16,384 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 8412 transitions. [2021-06-05 14:12:16,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:12:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8412 transitions. [2021-06-05 14:12:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:16,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:16,387 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:16,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50327,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:16,587 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1947577293, now seen corresponding path program 442 times [2021-06-05 14:12:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:16,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911207559] [2021-06-05 14:12:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:16,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911207559] [2021-06-05 14:12:16,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911207559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:16,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011145719] [2021-06-05 14:12:16,683 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 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 14:12:16,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:12:16,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:16,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:16,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:17,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:17,672 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 334 [2021-06-05 14:12:17,828 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 350 [2021-06-05 14:12:17,983 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 350 [2021-06-05 14:12:18,173 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 357 [2021-06-05 14:12:18,365 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 386 [2021-06-05 14:12:18,498 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 331 [2021-06-05 14:12:19,013 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 229 [2021-06-05 14:12:19,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:19,774 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:19,775 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:20,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:20,723 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:20,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:20,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011145719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:20,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:20,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 14:12:20,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284641466] [2021-06-05 14:12:20,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:12:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:12:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:12:20,750 INFO L87 Difference]: Start difference. First operand 2847 states and 8412 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) 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 14:12:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:22,059 INFO L93 Difference]: Finished difference Result 3268 states and 9465 transitions. [2021-06-05 14:12:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 14:12:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 22 [2021-06-05 14:12:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:22,063 INFO L225 Difference]: With dead ends: 3268 [2021-06-05 14:12:22,063 INFO L226 Difference]: Without dead ends: 3228 [2021-06-05 14:12:22,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 829.1ms TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:12:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-05 14:12:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2862. [2021-06-05 14:12:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.9598042642432714) internal successors, (8468), 2861 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 8468 transitions. [2021-06-05 14:12:22,091 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 8468 transitions. Word has length 22 [2021-06-05 14:12:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:22,091 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 8468 transitions. [2021-06-05 14:12:22,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) 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 14:12:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 8468 transitions. [2021-06-05 14:12:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:22,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:22,094 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:22,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50482 [2021-06-05 14:12:22,294 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash -636776695, now seen corresponding path program 443 times [2021-06-05 14:12:22,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:22,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231612488] [2021-06-05 14:12:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:22,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:22,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231612488] [2021-06-05 14:12:22,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231612488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:22,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429080055] [2021-06-05 14:12:22,393 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 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 14:12:22,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:12:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:22,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:22,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:22,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:24,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:24,293 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:24,293 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:25,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:25,281 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:25,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:25,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:25,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429080055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:25,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:25,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:12:25,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432713246] [2021-06-05 14:12:25,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:12:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:12:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:12:25,308 INFO L87 Difference]: Start difference. First operand 2862 states and 8468 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:12:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:26,827 INFO L93 Difference]: Finished difference Result 3624 states and 10394 transitions. [2021-06-05 14:12:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 14:12:26,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:12:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:26,831 INFO L225 Difference]: With dead ends: 3624 [2021-06-05 14:12:26,831 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 14:12:26,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=541, Invalid=4289, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:12:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 14:12:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2882. [2021-06-05 14:12:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.9597362027073935) internal successors, (8527), 2881 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 8527 transitions. [2021-06-05 14:12:26,861 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 8527 transitions. Word has length 22 [2021-06-05 14:12:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:26,861 INFO L482 AbstractCegarLoop]: Abstraction has 2882 states and 8527 transitions. [2021-06-05 14:12:26,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:12:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 8527 transitions. [2021-06-05 14:12:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:26,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:26,864 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:27,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50919,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:27,064 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 852628301, now seen corresponding path program 444 times [2021-06-05 14:12:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256235224] [2021-06-05 14:12:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:27,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:27,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256235224] [2021-06-05 14:12:27,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256235224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:27,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595479913] [2021-06-05 14:12:27,161 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 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 14:12:27,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:12:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:27,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:27,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:28,568 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 184 [2021-06-05 14:12:28,865 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 237 [2021-06-05 14:12:29,029 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 237 [2021-06-05 14:12:29,211 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 244 [2021-06-05 14:12:29,343 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 225 [2021-06-05 14:12:30,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:30,521 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:30,522 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:30,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:31,323 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 239 [2021-06-05 14:12:31,555 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 309 [2021-06-05 14:12:31,720 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 285 [2021-06-05 14:12:31,847 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 228 [2021-06-05 14:12:33,053 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 322 [2021-06-05 14:12:33,292 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 368 [2021-06-05 14:12:33,675 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 477 [2021-06-05 14:12:34,146 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 524 [2021-06-05 14:12:34,634 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 524 [2021-06-05 14:12:35,143 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 501 [2021-06-05 14:12:35,473 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 341 [2021-06-05 14:12:35,609 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 239 [2021-06-05 14:12:35,895 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 208 [2021-06-05 14:12:36,596 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 243 [2021-06-05 14:12:36,790 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 319 [2021-06-05 14:12:37,030 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 332 [2021-06-05 14:12:37,293 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 332 [2021-06-05 14:12:37,560 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 332 [2021-06-05 14:12:37,851 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 256 [2021-06-05 14:12:38,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:38,082 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:38,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:38,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:38,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595479913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:38,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:38,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:12:38,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411101223] [2021-06-05 14:12:38,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:12:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:12:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:12:38,108 INFO L87 Difference]: Start difference. First operand 2882 states and 8527 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:12:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:39,174 INFO L93 Difference]: Finished difference Result 3383 states and 9835 transitions. [2021-06-05 14:12:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:12:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:12:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:39,178 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 14:12:39,178 INFO L226 Difference]: Without dead ends: 3368 [2021-06-05 14:12:39,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:12:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-06-05 14:12:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2956. [2021-06-05 14:12:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.964128595600677) internal successors, (8759), 2955 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 8759 transitions. [2021-06-05 14:12:39,209 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 8759 transitions. Word has length 22 [2021-06-05 14:12:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:39,209 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 8759 transitions. [2021-06-05 14:12:39,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:12:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 8759 transitions. [2021-06-05 14:12:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:39,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:39,212 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:39,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51302 [2021-06-05 14:12:39,412 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -220457079, now seen corresponding path program 445 times [2021-06-05 14:12:39,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:39,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690516338] [2021-06-05 14:12:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:39,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690516338] [2021-06-05 14:12:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690516338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854623332] [2021-06-05 14:12:39,520 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 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 14:12:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:39,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:39,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:39,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:40,446 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 338 [2021-06-05 14:12:40,584 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 338 [2021-06-05 14:12:40,727 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 349 [2021-06-05 14:12:40,914 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 348 [2021-06-05 14:12:41,059 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 317 [2021-06-05 14:12:41,240 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 247 [2021-06-05 14:12:42,021 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 248 [2021-06-05 14:12:42,211 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 274 [2021-06-05 14:12:42,412 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 365 [2021-06-05 14:12:42,635 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 384 [2021-06-05 14:12:42,858 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 384 [2021-06-05 14:12:43,104 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 389 [2021-06-05 14:12:43,301 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 317 [2021-06-05 14:12:43,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:43,882 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:43,883 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:43,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:44,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:12:44,985 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:12:44,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:12:44,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:12:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:45,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854623332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:45,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:45,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:12:45,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323040863] [2021-06-05 14:12:45,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:12:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:12:45,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:12:45,012 INFO L87 Difference]: Start difference. First operand 2956 states and 8759 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:12:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:46,182 INFO L93 Difference]: Finished difference Result 3629 states and 10445 transitions. [2021-06-05 14:12:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 14:12:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:12:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:46,186 INFO L225 Difference]: With dead ends: 3629 [2021-06-05 14:12:46,186 INFO L226 Difference]: Without dead ends: 3597 [2021-06-05 14:12:46,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=456, Invalid=3834, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 14:12:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-05 14:12:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2955. [2021-06-05 14:12:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.9617467840216656) internal successors, (8749), 2954 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 8749 transitions. [2021-06-05 14:12:46,217 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 8749 transitions. Word has length 22 [2021-06-05 14:12:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:46,217 INFO L482 AbstractCegarLoop]: Abstraction has 2955 states and 8749 transitions. [2021-06-05 14:12:46,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:12:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 8749 transitions. [2021-06-05 14:12:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:46,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:46,220 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:46,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52248,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:12:46,420 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash 873634509, now seen corresponding path program 446 times [2021-06-05 14:12:46,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:46,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331165526] [2021-06-05 14:12:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:12:46,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331165526] [2021-06-05 14:12:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331165526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888357976] [2021-06-05 14:12:46,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:12:46,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:12:46,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:46,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:46,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:46,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:12:47,643 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 254 [2021-06-05 14:12:48,228 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 252 [2021-06-05 14:12:48,364 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 233 [2021-06-05 14:12:49,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:49,233 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:12:49,233 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:12:49,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:12:49,854 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 334 [2021-06-05 14:12:50,587 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 739 DAG size of output: 536 [2021-06-05 14:12:50,863 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 739 DAG size of output: 536 [2021-06-05 14:12:51,170 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 746 DAG size of output: 537 [2021-06-05 14:12:51,515 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 604 [2021-06-05 14:12:51,865 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 580 [2021-06-05 14:12:52,732 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 511 [2021-06-05 14:12:52,980 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 467 [2021-06-05 14:12:53,316 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 264 [2021-06-05 14:12:53,657 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 336 [2021-06-05 14:12:53,771 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 295 [2021-06-05 14:12:54,375 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 398 [2021-06-05 14:12:54,777 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 466 [2021-06-05 14:12:55,325 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 259 [2021-06-05 14:12:55,845 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 532 [2021-06-05 14:12:56,387 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 532 [2021-06-05 14:12:56,990 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 499 [2021-06-05 14:12:57,838 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 618 [2021-06-05 14:12:58,355 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 553 [2021-06-05 14:12:58,906 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 234 [2021-06-05 14:12:59,432 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 329 [2021-06-05 14:12:59,901 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 382 [2021-06-05 14:13:00,087 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 308 [2021-06-05 14:13:00,719 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 341 [2021-06-05 14:13:01,074 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 711 DAG size of output: 484 [2021-06-05 14:13:01,667 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 502 [2021-06-05 14:13:02,248 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 502 [2021-06-05 14:13:02,922 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 922 DAG size of output: 507 [2021-06-05 14:13:03,134 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 300 [2021-06-05 14:13:03,337 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 293 [2021-06-05 14:13:03,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:03,600 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:03,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:03,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:03,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888357976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:03,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:03,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:13:03,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518558713] [2021-06-05 14:13:03,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:13:03,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:03,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:13:03,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:13:03,628 INFO L87 Difference]: Start difference. First operand 2955 states and 8749 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:13:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:04,469 INFO L93 Difference]: Finished difference Result 3260 states and 9483 transitions. [2021-06-05 14:13:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:13:04,470 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:13:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:04,473 INFO L225 Difference]: With dead ends: 3260 [2021-06-05 14:13:04,473 INFO L226 Difference]: Without dead ends: 3245 [2021-06-05 14:13:04,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 812.6ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:13:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-05 14:13:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2963. [2021-06-05 14:13:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 2.960837272113437) internal successors, (8770), 2962 states have internal predecessors, (8770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 8770 transitions. [2021-06-05 14:13:04,503 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 8770 transitions. Word has length 22 [2021-06-05 14:13:04,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:04,503 INFO L482 AbstractCegarLoop]: Abstraction has 2963 states and 8770 transitions. [2021-06-05 14:13:04,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:13:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 8770 transitions. [2021-06-05 14:13:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:04,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:04,506 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:04,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52803 [2021-06-05 14:13:04,707 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash 430735369, now seen corresponding path program 447 times [2021-06-05 14:13:04,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:04,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289117098] [2021-06-05 14:13:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:04,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:04,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289117098] [2021-06-05 14:13:04,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289117098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:04,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131231053] [2021-06-05 14:13:04,824 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 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 14:13:04,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:13:04,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:04,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:04,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:05,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:05,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:06,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:06,216 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:06,217 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:06,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:06,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:06,862 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:06,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:06,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131231053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:06,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:06,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:13:06,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980015814] [2021-06-05 14:13:06,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:13:06,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:06,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:13:06,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:13:06,889 INFO L87 Difference]: Start difference. First operand 2963 states and 8770 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:13:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:07,893 INFO L93 Difference]: Finished difference Result 3373 states and 9785 transitions. [2021-06-05 14:13:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:13:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:13:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:07,897 INFO L225 Difference]: With dead ends: 3373 [2021-06-05 14:13:07,897 INFO L226 Difference]: Without dead ends: 3358 [2021-06-05 14:13:07,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 865.8ms TimeCoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:13:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-06-05 14:13:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2965. [2021-06-05 14:13:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-06-05 14:13:07,927 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-06-05 14:13:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:07,928 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-06-05 14:13:07,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:13:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-06-05 14:13:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:07,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:07,930 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:08,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53685 [2021-06-05 14:13:08,131 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash -414236083, now seen corresponding path program 448 times [2021-06-05 14:13:08,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:08,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955899122] [2021-06-05 14:13:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:08,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:08,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955899122] [2021-06-05 14:13:08,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955899122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:08,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207954807] [2021-06-05 14:13:08,257 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 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 14:13:08,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:13:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:08,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:08,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:09,298 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 272 [2021-06-05 14:13:10,169 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 214 [2021-06-05 14:13:10,414 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 269 [2021-06-05 14:13:10,532 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 257 [2021-06-05 14:13:11,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:11,532 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:11,532 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:11,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:12,115 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 197 [2021-06-05 14:13:13,144 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 254 [2021-06-05 14:13:13,357 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 265 [2021-06-05 14:13:13,653 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 293 [2021-06-05 14:13:13,941 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 312 [2021-06-05 14:13:14,349 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 365 [2021-06-05 14:13:14,738 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 365 [2021-06-05 14:13:15,188 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 369 [2021-06-05 14:13:15,348 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 238 [2021-06-05 14:13:15,535 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 270 [2021-06-05 14:13:16,361 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 199 [2021-06-05 14:13:16,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:16,717 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:16,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:16,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:16,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207954807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:16,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:16,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:13:16,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323696926] [2021-06-05 14:13:16,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:13:16,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:13:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:13:16,745 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:13:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:17,616 INFO L93 Difference]: Finished difference Result 3250 states and 9460 transitions. [2021-06-05 14:13:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:13:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:13:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:17,619 INFO L225 Difference]: With dead ends: 3250 [2021-06-05 14:13:17,619 INFO L226 Difference]: Without dead ends: 3240 [2021-06-05 14:13:17,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:13:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-06-05 14:13:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2965. [2021-06-05 14:13:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-06-05 14:13:17,648 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-06-05 14:13:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:17,649 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-06-05 14:13:17,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:13:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-06-05 14:13:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:17,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:17,651 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:17,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53954 [2021-06-05 14:13:17,852 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:17,852 INFO L82 PathProgramCache]: Analyzing trace with hash -536487783, now seen corresponding path program 449 times [2021-06-05 14:13:17,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:17,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387187598] [2021-06-05 14:13:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:17,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:17,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387187598] [2021-06-05 14:13:17,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387187598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:17,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263347031] [2021-06-05 14:13:17,963 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 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 14:13:17,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:13:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:17,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:18,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:18,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:18,950 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 274 [2021-06-05 14:13:19,060 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 274 [2021-06-05 14:13:19,214 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 281 [2021-06-05 14:13:19,362 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 360 [2021-06-05 14:13:19,634 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 272 [2021-06-05 14:13:19,997 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 278 [2021-06-05 14:13:20,101 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 278 [2021-06-05 14:13:20,240 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 283 [2021-06-05 14:13:20,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:20,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:20,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:13:20,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:13:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:20,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263347031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:20,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:20,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:13:20,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908514437] [2021-06-05 14:13:20,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:13:20,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:13:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:13:20,737 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:13:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:21,308 INFO L93 Difference]: Finished difference Result 3016 states and 8861 transitions. [2021-06-05 14:13:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:13:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:13:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:21,311 INFO L225 Difference]: With dead ends: 3016 [2021-06-05 14:13:21,311 INFO L226 Difference]: Without dead ends: 2990 [2021-06-05 14:13:21,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:13:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-06-05 14:13:21,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2965. [2021-06-05 14:13:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9612010796221324) internal successors, (8777), 2964 states have internal predecessors, (8777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8777 transitions. [2021-06-05 14:13:21,341 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8777 transitions. Word has length 22 [2021-06-05 14:13:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:21,341 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 8777 transitions. [2021-06-05 14:13:21,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:13:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8777 transitions. [2021-06-05 14:13:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:21,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:21,343 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:21,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54657 [2021-06-05 14:13:21,544 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash -468172775, now seen corresponding path program 450 times [2021-06-05 14:13:21,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:21,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377514631] [2021-06-05 14:13:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:21,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377514631] [2021-06-05 14:13:21,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377514631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:21,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221387965] [2021-06-05 14:13:21,660 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 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 14:13:21,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:13:21,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:21,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:22,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:23,186 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 204 [2021-06-05 14:13:23,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:24,187 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:24,188 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:24,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:25,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:25,413 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:25,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:25,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:25,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221387965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:25,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:25,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:13:25,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73522470] [2021-06-05 14:13:25,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:13:25,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:13:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:13:25,440 INFO L87 Difference]: Start difference. First operand 2965 states and 8777 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:13:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:26,518 INFO L93 Difference]: Finished difference Result 3832 states and 11188 transitions. [2021-06-05 14:13:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:13:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:13:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:26,522 INFO L225 Difference]: With dead ends: 3832 [2021-06-05 14:13:26,522 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 14:13:26,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 959.3ms TimeCoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:13:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 14:13:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2972. [2021-06-05 14:13:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 2.9619656681252104) internal successors, (8800), 2971 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 8800 transitions. [2021-06-05 14:13:26,556 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 8800 transitions. Word has length 22 [2021-06-05 14:13:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:26,556 INFO L482 AbstractCegarLoop]: Abstraction has 2972 states and 8800 transitions. [2021-06-05 14:13:26,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:13:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 8800 transitions. [2021-06-05 14:13:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:26,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:26,558 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:26,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54976 [2021-06-05 14:13:26,759 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash -682746697, now seen corresponding path program 451 times [2021-06-05 14:13:26,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:26,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146983315] [2021-06-05 14:13:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:26,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:26,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146983315] [2021-06-05 14:13:26,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146983315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:26,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287959438] [2021-06-05 14:13:26,857 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 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 14:13:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:26,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:26,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:27,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:27,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:28,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:28,665 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:28,665 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:28,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:29,254 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 247 [2021-06-05 14:13:29,367 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 247 [2021-06-05 14:13:29,517 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 255 [2021-06-05 14:13:29,656 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 275 [2021-06-05 14:13:29,819 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 270 [2021-06-05 14:13:30,022 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 297 [2021-06-05 14:13:30,853 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 267 [2021-06-05 14:13:31,844 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 241 [2021-06-05 14:13:32,147 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 352 [2021-06-05 14:13:32,474 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-06-05 14:13:32,884 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 395 [2021-06-05 14:13:33,281 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 395 [2021-06-05 14:13:33,744 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 397 [2021-06-05 14:13:34,128 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 342 [2021-06-05 14:13:34,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:34,769 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:34,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:34,769 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:34,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287959438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:34,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:34,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:13:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216492337] [2021-06-05 14:13:34,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:13:34,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:13:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:13:34,795 INFO L87 Difference]: Start difference. First operand 2972 states and 8800 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) 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 14:13:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:36,155 INFO L93 Difference]: Finished difference Result 3762 states and 10747 transitions. [2021-06-05 14:13:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 14:13:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 22 [2021-06-05 14:13:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:36,160 INFO L225 Difference]: With dead ends: 3762 [2021-06-05 14:13:36,160 INFO L226 Difference]: Without dead ends: 3707 [2021-06-05 14:13:36,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 961.5ms TimeCoverageRelationStatistics Valid=499, Invalid=4057, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 14:13:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-06-05 14:13:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2980. [2021-06-05 14:13:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.959718026183283) internal successors, (8817), 2979 states have internal predecessors, (8817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8817 transitions. [2021-06-05 14:13:36,193 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8817 transitions. Word has length 22 [2021-06-05 14:13:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:36,193 INFO L482 AbstractCegarLoop]: Abstraction has 2980 states and 8817 transitions. [2021-06-05 14:13:36,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) 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 14:13:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8817 transitions. [2021-06-05 14:13:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:36,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:36,195 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:36,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55371,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:36,396 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1755832077, now seen corresponding path program 452 times [2021-06-05 14:13:36,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:36,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309390723] [2021-06-05 14:13:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:36,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:36,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309390723] [2021-06-05 14:13:36,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309390723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:36,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774639326] [2021-06-05 14:13:36,502 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 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 14:13:36,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:13:36,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:36,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:36,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:36,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:36,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:37,939 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 272 [2021-06-05 14:13:38,085 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 287 [2021-06-05 14:13:38,208 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 287 [2021-06-05 14:13:38,347 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 292 [2021-06-05 14:13:38,461 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 215 [2021-06-05 14:13:38,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:38,974 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:38,975 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:38,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:39,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:39,616 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:39,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:39,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:39,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774639326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:39,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:39,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:13:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133404478] [2021-06-05 14:13:39,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:13:39,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:13:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:13:39,643 INFO L87 Difference]: Start difference. First operand 2980 states and 8817 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:13:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:40,891 INFO L93 Difference]: Finished difference Result 3987 states and 11396 transitions. [2021-06-05 14:13:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 14:13:40,892 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:13:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:40,896 INFO L225 Difference]: With dead ends: 3987 [2021-06-05 14:13:40,896 INFO L226 Difference]: Without dead ends: 3932 [2021-06-05 14:13:40,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=575, Invalid=4681, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:13:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-06-05 14:13:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2986. [2021-06-05 14:13:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.9591289782244554) internal successors, (8833), 2985 states have internal predecessors, (8833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 8833 transitions. [2021-06-05 14:13:40,930 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 8833 transitions. Word has length 22 [2021-06-05 14:13:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:40,930 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 8833 transitions. [2021-06-05 14:13:40,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:13:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 8833 transitions. [2021-06-05 14:13:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:40,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:40,932 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:41,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56024 [2021-06-05 14:13:41,133 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -661740489, now seen corresponding path program 453 times [2021-06-05 14:13:41,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:41,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69890889] [2021-06-05 14:13:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:13:41,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69890889] [2021-06-05 14:13:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69890889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769869408] [2021-06-05 14:13:41,241 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 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 14:13:41,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:13:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:41,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:41,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:42,506 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 243 [2021-06-05 14:13:42,975 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 300 [2021-06-05 14:13:43,154 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 300 [2021-06-05 14:13:43,358 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 307 [2021-06-05 14:13:43,589 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 367 [2021-06-05 14:13:43,814 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 317 [2021-06-05 14:13:44,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:44,592 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:13:44,592 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:13:44,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:13:45,246 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 220 [2021-06-05 14:13:45,382 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 264 [2021-06-05 14:13:46,197 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 273 [2021-06-05 14:13:47,184 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 294 [2021-06-05 14:13:47,595 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 461 [2021-06-05 14:13:48,134 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 533 [2021-06-05 14:13:48,695 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 533 [2021-06-05 14:13:49,359 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 540 [2021-06-05 14:13:49,821 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 220 [2021-06-05 14:13:50,687 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 284 [2021-06-05 14:13:50,886 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 363 [2021-06-05 14:13:51,100 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 363 [2021-06-05 14:13:51,329 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 350 [2021-06-05 14:13:51,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:51,732 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:51,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:51,732 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:13:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769869408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:51,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:51,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 14:13:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14388919] [2021-06-05 14:13:51,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 14:13:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 14:13:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:13:51,760 INFO L87 Difference]: Start difference. First operand 2986 states and 8833 transitions. Second operand has 30 states, 30 states have (on average 1.3) 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 14:13:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:52,692 INFO L93 Difference]: Finished difference Result 3474 states and 10057 transitions. [2021-06-05 14:13:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:13:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) 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 22 [2021-06-05 14:13:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:52,696 INFO L225 Difference]: With dead ends: 3474 [2021-06-05 14:13:52,696 INFO L226 Difference]: Without dead ends: 3459 [2021-06-05 14:13:52,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 823.6ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:13:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-06-05 14:13:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3009. [2021-06-05 14:13:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.95844414893617) internal successors, (8899), 3008 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8899 transitions. [2021-06-05 14:13:52,727 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8899 transitions. Word has length 22 [2021-06-05 14:13:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:52,727 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8899 transitions. [2021-06-05 14:13:52,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) 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 14:13:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8899 transitions. [2021-06-05 14:13:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:52,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:52,729 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:52,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56417,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:52,930 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1104639629, now seen corresponding path program 454 times [2021-06-05 14:13:52,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720718037] [2021-06-05 14:13:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:53,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:53,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720718037] [2021-06-05 14:13:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720718037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:53,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668243818] [2021-06-05 14:13:53,047 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 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 14:13:53,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:13:53,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:53,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:53,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:53,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:13:54,061 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 331 [2021-06-05 14:13:54,203 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 345 [2021-06-05 14:13:54,364 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 345 [2021-06-05 14:13:54,530 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 356 [2021-06-05 14:13:54,899 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 407 [2021-06-05 14:13:55,194 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 417 [2021-06-05 14:13:55,547 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 316 [2021-06-05 14:13:56,312 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 228 [2021-06-05 14:13:56,549 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 300 [2021-06-05 14:13:56,793 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 206 [2021-06-05 14:13:57,635 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 229 [2021-06-05 14:13:57,942 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 421 [2021-06-05 14:13:58,372 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 965 DAG size of output: 491 [2021-06-05 14:13:58,870 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 1013 DAG size of output: 526 [2021-06-05 14:13:59,397 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 1013 DAG size of output: 526 [2021-06-05 14:13:59,966 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 1020 DAG size of output: 533 [2021-06-05 14:14:00,464 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 587 [2021-06-05 14:14:01,179 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 399 [2021-06-05 14:14:01,895 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 230 [2021-06-05 14:14:02,035 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 265 [2021-06-05 14:14:02,174 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 265 [2021-06-05 14:14:02,328 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 262 [2021-06-05 14:14:02,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:02,703 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:14:02,703 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:14:02,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:14:03,361 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 310 [2021-06-05 14:14:03,483 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 316 [2021-06-05 14:14:03,602 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 316 [2021-06-05 14:14:03,760 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 321 [2021-06-05 14:14:04,018 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 371 [2021-06-05 14:14:04,513 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 314 [2021-06-05 14:14:05,111 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 263 [2021-06-05 14:14:05,217 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 263 [2021-06-05 14:14:05,390 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 281 [2021-06-05 14:14:05,522 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 271 [2021-06-05 14:14:06,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:14:06,127 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:14:06,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:14:06,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:14:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:06,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668243818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:06,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:06,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:14:06,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035176579] [2021-06-05 14:14:06,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:14:06,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:14:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:14:06,154 INFO L87 Difference]: Start difference. First operand 3009 states and 8899 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:14:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:07,031 INFO L93 Difference]: Finished difference Result 3621 states and 10478 transitions. [2021-06-05 14:14:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:14:07,031 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:14:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:07,035 INFO L225 Difference]: With dead ends: 3621 [2021-06-05 14:14:07,035 INFO L226 Difference]: Without dead ends: 3606 [2021-06-05 14:14:07,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 888.4ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:14:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-06-05 14:14:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3017. [2021-06-05 14:14:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-06-05 14:14:07,067 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-06-05 14:14:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:07,067 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-06-05 14:14:07,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:14:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-06-05 14:14:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:14:07,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:07,070 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:07,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57293,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:07,271 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:14:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:07,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1949611081, now seen corresponding path program 455 times [2021-06-05 14:14:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:07,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018773628] [2021-06-05 14:14:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:07,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:07,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018773628] [2021-06-05 14:14:07,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018773628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:07,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266870362] [2021-06-05 14:14:07,387 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 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 14:14:07,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:14:07,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:07,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:14:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:07,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:14:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:14:09,819 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 272 [2021-06-05 14:14:10,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:10,312 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-06-05 14:14:10,313 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-06-05 14:14:10,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-06-05 14:14:11,856 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 262 [2021-06-05 14:14:11,992 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 262 [2021-06-05 14:14:12,169 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 299 [2021-06-05 14:14:13,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:14:13,057 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:14:13,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:14:13,058 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-06-05 14:14:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:13,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266870362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:13,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:13,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:14:13,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809224993] [2021-06-05 14:14:13,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:14:13,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:13,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:14:13,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:14:13,084 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:14:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:13,913 INFO L93 Difference]: Finished difference Result 3506 states and 10182 transitions. [2021-06-05 14:14:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:14:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-06-05 14:14:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:13,917 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 14:14:13,917 INFO L226 Difference]: Without dead ends: 3496 [2021-06-05 14:14:13,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 835.9ms TimeCoverageRelationStatistics Valid=340, Invalid=2522, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:14:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-06-05 14:14:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3017. [2021-06-05 14:14:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-06-05 14:14:13,948 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-06-05 14:14:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:13,948 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-06-05 14:14:13,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 14:14:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-06-05 14:14:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:14:13,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:13,950 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:14,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58273,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:14,151 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:14:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1255070853, now seen corresponding path program 456 times [2021-06-05 14:14:14,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:14,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057352094] [2021-06-05 14:14:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:14,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:14,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057352094] [2021-06-05 14:14:14,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057352094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:14,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247829469] [2021-06-05 14:14:14,249 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 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 14:14:14,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:14:14,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:14,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:14:14,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:14,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:14:14,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:14:15,225 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 259 [2021-06-05 14:14:15,394 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 197 [2021-06-05 14:14:16,230 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 194 [2021-06-05 14:14:16,385 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 226 [2021-06-05 14:14:17,063 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 223 [2021-06-05 14:14:17,779 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 284 [2021-06-05 14:14:18,136 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 406 [2021-06-05 14:14:18,474 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 406 [2021-06-05 14:14:18,857 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 411 [2021-06-05 14:14:19,107 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 383 Received shutdown request... [2021-06-05 14:14:19,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58857 [2021-06-05 14:14:19,920 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:14:19,922 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:14:19,923 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:14:19,923 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:14:19 BasicIcfg [2021-06-05 14:14:19,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:14:19,924 INFO L168 Benchmark]: Toolchain (without parser) took 888889.51 ms. Allocated memory was 369.1 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 348.9 MB in the beginning and 2.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-06-05 14:14:19,924 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 369.1 MB. Free memory was 350.1 MB in the beginning and 350.0 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:14:19,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.83 ms. Allocated memory is still 369.1 MB. Free memory was 348.8 MB in the beginning and 347.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:14:19,924 INFO L168 Benchmark]: Boogie Preprocessor took 12.27 ms. Allocated memory is still 369.1 MB. Free memory was 347.4 MB in the beginning and 346.4 MB in the end (delta: 962.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:14:19,924 INFO L168 Benchmark]: RCFGBuilder took 241.48 ms. Allocated memory is still 369.1 MB. Free memory was 346.4 MB in the beginning and 331.6 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 14:14:19,924 INFO L168 Benchmark]: TraceAbstraction took 888614.43 ms. Allocated memory was 369.1 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 331.2 MB in the beginning and 2.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-06-05 14:14:19,924 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 0.09 ms. Allocated memory is still 369.1 MB. Free memory was 350.1 MB in the beginning and 350.0 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.83 ms. Allocated memory is still 369.1 MB. Free memory was 348.8 MB in the beginning and 347.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.27 ms. Allocated memory is still 369.1 MB. Free memory was 347.4 MB in the beginning and 346.4 MB in the end (delta: 962.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 241.48 ms. Allocated memory is still 369.1 MB. Free memory was 346.4 MB in the beginning and 331.6 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 888614.43 ms. Allocated memory was 369.1 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 331.2 MB in the beginning and 2.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 888508.9ms, OverallIterations: 464, TraceHistogramMax: 8, EmptinessCheckTime: 581.8ms, AutomataDifference: 131143.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10133 SDtfs, 23465 SDslu, 88319 SDs, 0 SdLazy, 190945 SolverSat, 16529 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59107.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17932 GetRequests, 6234 SyntacticMatches, 122 SemanticMatches, 11576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87542 ImplicationChecksByTransitivity, 113341.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5602occurred in iteration=314, InterpolantAutomatonStates: 9911, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7790.8ms AutomataMinimizationTime, 463 MinimizatonAttempts, 97828 StatesRemovedByMinimization, 461 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1088.0ms SsaConstructionTime, 3988.0ms SatisfiabilityAnalysisTime, 637097.0ms InterpolantComputationTime, 17441 NumberOfCodeBlocks, 17441 NumberOfCodeBlocksAsserted, 1831 NumberOfCheckSat, 16519 ConstructedInterpolants, 0 QuantifiedInterpolants, 158340 SizeOfPredicates, 700 NumberOfNonLiveVariables, 34774 ConjunctsInSsa, 11874 ConjunctsInUnsatCore, 922 InterpolantComputations, 4 PerfectInterpolantSequences, 4647/26522 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