/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:16:00,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:16:00,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:16:00,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:16:00,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:16:00,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:16:00,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:16:00,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:16:00,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:16:00,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:16:00,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:16:00,674 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:16:00,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:16:00,674 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:16:00,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:16:00,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:16:00,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:16:00,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:16:00,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:16:00,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:16:00,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:16:00,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:16:00,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:16:00,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:16:00,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:16:00,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:16:00,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:16:00,677 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:16:00,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:16:00,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:16:00,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:16:00,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:16:00,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:16:00,982 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:16:00,984 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:16:00,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-07-13 19:16:00,984 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-07-13 19:16:01,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:16:01,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:16:01,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:16:01,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:16:01,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:16:01,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:16:01,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:16:01,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:16:01,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:16:01,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/1) ... [2021-07-13 19:16:01,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:16:01,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:16:01,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:16:01,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:16:01,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (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 [2021-07-13 19:16:01,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:16:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:16:01,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:16:01,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:16:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:16:01,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:16:01,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:16:01,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:16:01,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:16:01,113 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:16:01,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:16:01,366 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:16:01,367 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 19:16:01,367 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 19:16:01,368 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:16:01 BoogieIcfgContainer [2021-07-13 19:16:01,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:16:01,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:16:01,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:16:01,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:16:01,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:16:01" (1/2) ... [2021-07-13 19:16:01,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a33ef7 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:16:01, skipping insertion in model container [2021-07-13 19:16:01,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:16:01" (2/2) ... [2021-07-13 19:16:01,373 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-07-13 19:16:01,376 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:16:01,377 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:16:01,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:16:01,377 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:16:01,425 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:16:01,439 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:16:01,468 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:16:01,468 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:16:01,468 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:16:01,469 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:16:01,469 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:16:01,469 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:16:01,469 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:16:01,469 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:16:01,491 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-13 19:16:01,500 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) 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) [2021-07-13 19:16:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) 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) [2021-07-13 19:16:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-13 19:16:01,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:01,505 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:01,506 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1694861722, now seen corresponding path program 1 times [2021-07-13 19:16:01,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:01,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647433573] [2021-07-13 19:16:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:01,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:01,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647433573] [2021-07-13 19:16:01,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647433573] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:16:01,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:16:01,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:16:01,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408492282] [2021-07-13 19:16:01,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:16:01,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:01,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:16:01,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:16:01,666 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:01,702 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-07-13 19:16:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:16:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-07-13 19:16:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:01,709 INFO L225 Difference]: With dead ends: 22 [2021-07-13 19:16:01,709 INFO L226 Difference]: Without dead ends: 19 [2021-07-13 19:16:01,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:16:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-07-13 19:16:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-07-13 19:16:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-07-13 19:16:01,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-07-13 19:16:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:01,740 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-07-13 19:16:01,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-07-13 19:16:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:16:01,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:01,741 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:01,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:16:01,742 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash 658584646, now seen corresponding path program 1 times [2021-07-13 19:16:01,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:01,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619575554] [2021-07-13 19:16:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:01,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:01,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619575554] [2021-07-13 19:16:01,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619575554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616963909] [2021-07-13 19:16:01,804 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 [2021-07-13 19:16:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:16:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:01,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616963909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:01,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:01,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 19:16:01,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318323313] [2021-07-13 19:16:01,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:16:01,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:16:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:16:01,914 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:01,949 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-07-13 19:16:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:16:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:16:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:01,951 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:16:01,951 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 19:16:01,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:16:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 19:16:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-07-13 19:16:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-07-13 19:16:01,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-07-13 19:16:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:01,966 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-07-13 19:16:01,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-07-13 19:16:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:16:01,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:01,967 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:16:02,181 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,182 INFO L82 PathProgramCache]: Analyzing trace with hash -978034129, now seen corresponding path program 1 times [2021-07-13 19:16:02,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217905332] [2021-07-13 19:16:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217905332] [2021-07-13 19:16:02,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217905332] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:16:02,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:16:02,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:16:02,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645447925] [2021-07-13 19:16:02,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:16:02,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:16:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:02,213 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-07-13 19:16:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:02,242 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-07-13 19:16:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:16:02,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-07-13 19:16:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:02,247 INFO L225 Difference]: With dead ends: 22 [2021-07-13 19:16:02,247 INFO L226 Difference]: Without dead ends: 18 [2021-07-13 19:16:02,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:16:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-13 19:16:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-13 19:16:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-07-13 19:16:02,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-07-13 19:16:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,254 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-07-13 19:16:02,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-07-13 19:16:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-07-13 19:16:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:16:02,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,255 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:16:02,255 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1576587559, now seen corresponding path program 2 times [2021-07-13 19:16:02,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671812683] [2021-07-13 19:16:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671812683] [2021-07-13 19:16:02,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671812683] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:16:02,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:16:02,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:16:02,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542893619] [2021-07-13 19:16:02,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:16:02,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:16:02,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:02,295 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-07-13 19:16:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:02,349 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-07-13 19:16:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:16:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-07-13 19:16:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:02,350 INFO L225 Difference]: With dead ends: 20 [2021-07-13 19:16:02,350 INFO L226 Difference]: Without dead ends: 20 [2021-07-13 19:16:02,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-07-13 19:16:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-07-13 19:16:02,352 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) [2021-07-13 19:16:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-13 19:16:02,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-13 19:16:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,352 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-13 19:16:02,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-07-13 19:16:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-13 19:16:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:16:02,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,353 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:16:02,353 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1035640753, now seen corresponding path program 1 times [2021-07-13 19:16:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108522576] [2021-07-13 19:16:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:02,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108522576] [2021-07-13 19:16:02,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108522576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659887180] [2021-07-13 19:16:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 19:16:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:16:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:02,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659887180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:02,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:16:02,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306686944] [2021-07-13 19:16:02,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:16:02,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:16:02,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:02,424 INFO L87 Difference]: Start difference. First operand 20 states and 35 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) [2021-07-13 19:16:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:02,434 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-07-13 19:16:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:16:02,435 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 [2021-07-13 19:16:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:02,435 INFO L225 Difference]: With dead ends: 24 [2021-07-13 19:16:02,435 INFO L226 Difference]: Without dead ends: 24 [2021-07-13 19:16:02,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:16:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-07-13 19:16:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-07-13 19:16:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-07-13 19:16:02,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-07-13 19:16:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,438 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-07-13 19:16:02,438 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) [2021-07-13 19:16:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-07-13 19:16:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:16:02,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,438 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:02,654 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1473521199, now seen corresponding path program 2 times [2021-07-13 19:16:02,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587257252] [2021-07-13 19:16:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587257252] [2021-07-13 19:16:02,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587257252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009378856] [2021-07-13 19:16:02,677 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 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 [2021-07-13 19:16:02,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:02,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:16:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:02,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:02,756 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 [2021-07-13 19:16:02,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:02,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:02,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:02,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-13 19:16:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009378856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:02,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 19:16:02,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746682007] [2021-07-13 19:16:02,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:02,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:02,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:02,768 INFO L87 Difference]: Start difference. First operand 24 states and 43 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) [2021-07-13 19:16:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:02,790 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-07-13 19:16:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:02,791 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 12 [2021-07-13 19:16:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:02,791 INFO L225 Difference]: With dead ends: 54 [2021-07-13 19:16:02,791 INFO L226 Difference]: Without dead ends: 51 [2021-07-13 19:16:02,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-13 19:16:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-07-13 19:16:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-07-13 19:16:02,795 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-07-13 19:16:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,795 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-07-13 19:16:02,795 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) [2021-07-13 19:16:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-07-13 19:16:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:16:02,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,796 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:03,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:03,011 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1077921553, now seen corresponding path program 3 times [2021-07-13 19:16:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:03,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75118995] [2021-07-13 19:16:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:03,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:03,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75118995] [2021-07-13 19:16:03,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75118995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589257734] [2021-07-13 19:16:03,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:03,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:16:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:16:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:03,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:03,098 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 [2021-07-13 19:16:03,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:03,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:03,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:03,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-13 19:16:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:03,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589257734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:03,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 19:16:03,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416406618] [2021-07-13 19:16:03,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:03,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:03,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:03,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:03,112 INFO L87 Difference]: Start difference. First operand 34 states and 70 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) [2021-07-13 19:16:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:03,157 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-07-13 19:16:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:03,158 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 12 [2021-07-13 19:16:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:03,158 INFO L225 Difference]: With dead ends: 61 [2021-07-13 19:16:03,158 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 19:16:03,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 19:16:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-07-13 19:16:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-07-13 19:16:03,162 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-07-13 19:16:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:03,163 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-07-13 19:16:03,163 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) [2021-07-13 19:16:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-07-13 19:16:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:16:03,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:03,163 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:03,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:03,380 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash -452129241, now seen corresponding path program 4 times [2021-07-13 19:16:03,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:03,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624885099] [2021-07-13 19:16:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:03,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:03,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624885099] [2021-07-13 19:16:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624885099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877452190] [2021-07-13 19:16:03,402 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:16:03,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:16:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:03,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:03,493 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 [2021-07-13 19:16:03,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:03,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:03,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:03,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-13 19:16:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:03,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877452190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:03,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 19:16:03,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492140362] [2021-07-13 19:16:03,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:03,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:03,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:03,506 INFO L87 Difference]: Start difference. First operand 39 states and 87 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) [2021-07-13 19:16:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:03,532 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-07-13 19:16:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:03,533 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 12 [2021-07-13 19:16:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:03,534 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:16:03,534 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:16:03,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:16:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-07-13 19:16:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-07-13 19:16:03,538 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-07-13 19:16:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:03,538 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-07-13 19:16:03,538 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) [2021-07-13 19:16:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-07-13 19:16:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:03,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:03,539 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:03,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:03,757 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:03,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1948130383, now seen corresponding path program 5 times [2021-07-13 19:16:03,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:03,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739983769] [2021-07-13 19:16:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:03,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:03,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739983769] [2021-07-13 19:16:03,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739983769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931429949] [2021-07-13 19:16:03,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:03,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:03,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931429949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:03,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:16:03,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174472625] [2021-07-13 19:16:03,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:03,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:03,857 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:03,920 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-07-13 19:16:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 13 [2021-07-13 19:16:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:03,921 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:16:03,921 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:16:03,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:16:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-07-13 19:16:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-07-13 19:16:03,925 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-07-13 19:16:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:03,925 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-07-13 19:16:03,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-07-13 19:16:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:03,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:03,926 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:04,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:04,142 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:04,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1542411386, now seen corresponding path program 6 times [2021-07-13 19:16:04,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:04,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450934441] [2021-07-13 19:16:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:04,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:04,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450934441] [2021-07-13 19:16:04,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450934441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045665972] [2021-07-13 19:16:04,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:04,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:16:04,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:04,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:04,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045665972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:04,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:16:04,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180104827] [2021-07-13 19:16:04,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:04,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:04,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:04,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:04,227 INFO L87 Difference]: Start difference. First operand 46 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:04,297 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-07-13 19:16:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 13 [2021-07-13 19:16:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:04,298 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:16:04,298 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:16:04,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:16:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-07-13 19:16:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 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) [2021-07-13 19:16:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-07-13 19:16:04,301 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-07-13 19:16:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:04,301 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-07-13 19:16:04,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-07-13 19:16:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:04,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:04,302 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:04,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:16:04,518 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:04,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1142142321, now seen corresponding path program 7 times [2021-07-13 19:16:04,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:04,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165392774] [2021-07-13 19:16:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:04,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165392774] [2021-07-13 19:16:04,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165392774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765418460] [2021-07-13 19:16:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765418460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:04,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985552149] [2021-07-13 19:16:04,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:04,593 INFO L87 Difference]: Start difference. First operand 56 states and 133 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) [2021-07-13 19:16:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:04,637 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-07-13 19:16:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:04,638 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 13 [2021-07-13 19:16:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:04,638 INFO L225 Difference]: With dead ends: 71 [2021-07-13 19:16:04,638 INFO L226 Difference]: Without dead ends: 70 [2021-07-13 19:16:04,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-13 19:16:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-07-13 19:16:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 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) [2021-07-13 19:16:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-07-13 19:16:04,641 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-07-13 19:16:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:04,641 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-07-13 19:16:04,642 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) [2021-07-13 19:16:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-07-13 19:16:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:04,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:04,642 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:04,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:16:04,858 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2059198674, now seen corresponding path program 8 times [2021-07-13 19:16:04,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:04,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130142661] [2021-07-13 19:16:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:04,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:04,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130142661] [2021-07-13 19:16:04,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130142661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702132757] [2021-07-13 19:16:04,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:04,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:04,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:04,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:04,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702132757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:04,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:04,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127901155] [2021-07-13 19:16:04,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:04,933 INFO L87 Difference]: Start difference. First operand 57 states and 133 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) [2021-07-13 19:16:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:04,960 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-07-13 19:16:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:16:04,960 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 13 [2021-07-13 19:16:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:04,961 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:16:04,961 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:16:04,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:16:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-07-13 19:16:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 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) [2021-07-13 19:16:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-07-13 19:16:04,963 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-07-13 19:16:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:04,964 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-07-13 19:16:04,964 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) [2021-07-13 19:16:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-07-13 19:16:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:04,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:04,964 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:05,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:05,181 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 22479943, now seen corresponding path program 9 times [2021-07-13 19:16:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:05,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601708038] [2021-07-13 19:16:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:05,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:05,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601708038] [2021-07-13 19:16:05,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601708038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946489555] [2021-07-13 19:16:05,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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) [2021-07-13 19:16:05,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946489555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:05,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:05,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422472509] [2021-07-13 19:16:05,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:05,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:05,276 INFO L87 Difference]: Start difference. First operand 57 states and 133 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) [2021-07-13 19:16:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:05,302 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-07-13 19:16:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:16:05,302 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 13 [2021-07-13 19:16:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:05,303 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:16:05,303 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:16:05,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:16:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-07-13 19:16:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-07-13 19:16:05,306 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-07-13 19:16:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:05,306 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-07-13 19:16:05,306 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) [2021-07-13 19:16:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-07-13 19:16:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:05,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:05,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:05,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:05,524 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:05,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:05,525 INFO L82 PathProgramCache]: Analyzing trace with hash 967241926, now seen corresponding path program 10 times [2021-07-13 19:16:05,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:05,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581398267] [2021-07-13 19:16:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:05,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581398267] [2021-07-13 19:16:05,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581398267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294672721] [2021-07-13 19:16:05,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:05,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:05,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:05,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:05,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:05,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294672721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:05,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622997940] [2021-07-13 19:16:05,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:05,593 INFO L87 Difference]: Start difference. First operand 60 states and 143 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) [2021-07-13 19:16:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:05,640 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-07-13 19:16:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:05,640 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 13 [2021-07-13 19:16:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:05,641 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:16:05,641 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:16:05,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:16:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-07-13 19:16:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-07-13 19:16:05,644 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-07-13 19:16:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:05,644 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-07-13 19:16:05,644 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) [2021-07-13 19:16:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-07-13 19:16:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:05,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:05,644 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:05,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:16:05,863 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:05,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1767934633, now seen corresponding path program 11 times [2021-07-13 19:16:05,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:05,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371279811] [2021-07-13 19:16:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:05,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:05,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371279811] [2021-07-13 19:16:05,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371279811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666955087] [2021-07-13 19:16:05,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:05,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666955087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:05,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810741686] [2021-07-13 19:16:05,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:05,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:05,932 INFO L87 Difference]: Start difference. First operand 64 states and 157 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) [2021-07-13 19:16:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:05,975 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-07-13 19:16:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:05,975 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 13 [2021-07-13 19:16:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:05,976 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:16:05,976 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:16:05,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:16:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-07-13 19:16:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-07-13 19:16:05,978 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-07-13 19:16:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:05,978 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-07-13 19:16:05,978 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) [2021-07-13 19:16:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-07-13 19:16:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:05,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:05,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:06,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:16:06,195 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1609976310, now seen corresponding path program 12 times [2021-07-13 19:16:06,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:06,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063990832] [2021-07-13 19:16:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:06,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:06,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063990832] [2021-07-13 19:16:06,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063990832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786663671] [2021-07-13 19:16:06,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:06,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:16:06,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:06,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786663671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:06,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:16:06,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447297869] [2021-07-13 19:16:06,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:16:06,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:16:06,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:16:06,266 INFO L87 Difference]: Start difference. First operand 64 states and 156 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) [2021-07-13 19:16:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:06,293 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-07-13 19:16:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:16:06,294 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 13 [2021-07-13 19:16:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:06,294 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:16:06,294 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:16:06,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:16:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-07-13 19:16:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-07-13 19:16:06,297 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-07-13 19:16:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:06,297 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-07-13 19:16:06,297 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) [2021-07-13 19:16:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-07-13 19:16:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:06,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:06,297 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:06,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:16:06,513 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash -816419355, now seen corresponding path program 13 times [2021-07-13 19:16:06,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:06,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171783011] [2021-07-13 19:16:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:06,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:06,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171783011] [2021-07-13 19:16:06,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171783011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917045132] [2021-07-13 19:16:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:06,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917045132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:06,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:16:06,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656948622] [2021-07-13 19:16:06,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:06,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:06,587 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:06,639 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-07-13 19:16:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:06,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 13 [2021-07-13 19:16:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:06,640 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:16:06,640 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:16:06,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:16:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-07-13 19:16:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-07-13 19:16:06,642 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-07-13 19:16:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:06,643 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-07-13 19:16:06,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-07-13 19:16:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:06,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:06,643 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:06,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:06,859 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:06,859 INFO L82 PathProgramCache]: Analyzing trace with hash 955943652, now seen corresponding path program 14 times [2021-07-13 19:16:06,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:06,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436998671] [2021-07-13 19:16:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:06,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436998671] [2021-07-13 19:16:06,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436998671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772566737] [2021-07-13 19:16:06,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:06,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772566737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:16:06,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129937883] [2021-07-13 19:16:06,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:06,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:06,932 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:06,979 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-07-13 19:16:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 13 [2021-07-13 19:16:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:06,980 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:16:06,980 INFO L226 Difference]: Without dead ends: 101 [2021-07-13 19:16:06,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-07-13 19:16:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-07-13 19:16:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-07-13 19:16:06,983 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-07-13 19:16:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:06,983 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-07-13 19:16:06,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-07-13 19:16:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-07-13 19:16:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:06,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:06,984 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:07,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:16:07,200 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2052794865, now seen corresponding path program 15 times [2021-07-13 19:16:07,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:07,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553512610] [2021-07-13 19:16:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:07,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:07,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553512610] [2021-07-13 19:16:07,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553512610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:07,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354493906] [2021-07-13 19:16:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:07,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:07,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:07,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354493906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:07,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:07,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-07-13 19:16:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738610201] [2021-07-13 19:16:07,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:07,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:07,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:07,281 INFO L87 Difference]: Start difference. First operand 65 states and 157 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) [2021-07-13 19:16:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:07,329 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-07-13 19:16:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:07,329 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 13 [2021-07-13 19:16:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:07,330 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:16:07,330 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:16:07,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:16:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-07-13 19:16:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-07-13 19:16:07,332 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-07-13 19:16:07,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:07,332 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-07-13 19:16:07,332 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) [2021-07-13 19:16:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-07-13 19:16:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:07,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:07,333 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:07,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:07,549 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1108032882, now seen corresponding path program 16 times [2021-07-13 19:16:07,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:07,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263048003] [2021-07-13 19:16:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:07,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263048003] [2021-07-13 19:16:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263048003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714398706] [2021-07-13 19:16:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:07,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:07,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:07,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714398706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:07,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:07,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-07-13 19:16:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769019716] [2021-07-13 19:16:07,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:07,719 INFO L87 Difference]: Start difference. First operand 69 states and 172 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) [2021-07-13 19:16:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:07,784 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-07-13 19:16:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:07,784 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 13 [2021-07-13 19:16:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:07,785 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:16:07,785 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:16:07,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:16:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-07-13 19:16:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-07-13 19:16:07,788 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-07-13 19:16:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:07,788 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-07-13 19:16:07,788 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) [2021-07-13 19:16:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-07-13 19:16:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:07,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:07,788 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:08,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:08,004 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:08,004 INFO L82 PathProgramCache]: Analyzing trace with hash -307340175, now seen corresponding path program 17 times [2021-07-13 19:16:08,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:08,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119702389] [2021-07-13 19:16:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:08,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:08,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119702389] [2021-07-13 19:16:08,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119702389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286723235] [2021-07-13 19:16:08,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:08,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:08,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:08,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286723235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:08,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-07-13 19:16:08,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256208759] [2021-07-13 19:16:08,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:08,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:08,097 INFO L87 Difference]: Start difference. First operand 75 states and 192 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) [2021-07-13 19:16:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:08,152 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-07-13 19:16:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:08,153 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 13 [2021-07-13 19:16:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:08,153 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:16:08,153 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:16:08,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:16:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-07-13 19:16:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-07-13 19:16:08,156 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-07-13 19:16:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:08,156 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-07-13 19:16:08,156 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) [2021-07-13 19:16:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-07-13 19:16:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:08,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:08,156 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:08,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:16:08,375 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash 609716178, now seen corresponding path program 18 times [2021-07-13 19:16:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:08,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571399584] [2021-07-13 19:16:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:08,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:08,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571399584] [2021-07-13 19:16:08,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571399584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721125109] [2021-07-13 19:16:08,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-07-13 19:16:08,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:16:08,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:08,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:08,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:08,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721125109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:08,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-07-13 19:16:08,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68875626] [2021-07-13 19:16:08,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:16:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:08,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:16:08,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:16:08,455 INFO L87 Difference]: Start difference. First operand 75 states and 191 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) [2021-07-13 19:16:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:08,500 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-07-13 19:16:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:08,500 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 13 [2021-07-13 19:16:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:08,500 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:16:08,501 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:16:08,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:16:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-07-13 19:16:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 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) [2021-07-13 19:16:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-07-13 19:16:08,503 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-07-13 19:16:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:08,503 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-07-13 19:16:08,503 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) [2021-07-13 19:16:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-07-13 19:16:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:08,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:08,503 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:08,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:08,719 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1403273133, now seen corresponding path program 19 times [2021-07-13 19:16:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:08,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402319185] [2021-07-13 19:16:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:08,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402319185] [2021-07-13 19:16:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402319185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138904041] [2021-07-13 19:16:08,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138904041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:08,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:08,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 19:16:08,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91943022] [2021-07-13 19:16:08,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:08,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:08,796 INFO L87 Difference]: Start difference. First operand 74 states and 185 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) [2021-07-13 19:16:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:08,859 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-07-13 19:16:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:08,859 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 13 [2021-07-13 19:16:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:08,860 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:16:08,860 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:16:08,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:16:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-07-13 19:16:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-07-13 19:16:08,862 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-07-13 19:16:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:08,863 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-07-13 19:16:08,863 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) [2021-07-13 19:16:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-07-13 19:16:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:08,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:08,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:09,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:16:09,077 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1119331156, now seen corresponding path program 20 times [2021-07-13 19:16:09,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:09,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277905534] [2021-07-13 19:16:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277905534] [2021-07-13 19:16:09,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277905534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310447599] [2021-07-13 19:16:09,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:09,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:09,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310447599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:09,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 19:16:09,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113588624] [2021-07-13 19:16:09,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:09,159 INFO L87 Difference]: Start difference. First operand 74 states and 184 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) [2021-07-13 19:16:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:09,218 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-07-13 19:16:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:09,219 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 13 [2021-07-13 19:16:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:09,219 INFO L225 Difference]: With dead ends: 103 [2021-07-13 19:16:09,219 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:16:09,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:16:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-07-13 19:16:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-07-13 19:16:09,221 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-07-13 19:16:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:09,221 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-07-13 19:16:09,221 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) [2021-07-13 19:16:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-07-13 19:16:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:09,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:09,222 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:09,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:16:09,438 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:09,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289167, now seen corresponding path program 21 times [2021-07-13 19:16:09,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:09,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120072470] [2021-07-13 19:16:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:09,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120072470] [2021-07-13 19:16:09,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120072470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658426975] [2021-07-13 19:16:09,467 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 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 [2021-07-13 19:16:09,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:09,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658426975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:09,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 19:16:09,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412983245] [2021-07-13 19:16:09,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:09,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:09,538 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:09,593 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-07-13 19:16:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:16:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:09,594 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:16:09,594 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:16:09,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:16:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-07-13 19:16:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-07-13 19:16:09,596 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-07-13 19:16:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:09,596 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-07-13 19:16:09,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-07-13 19:16:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:16:09,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:09,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:09,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:09,812 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1114776338, now seen corresponding path program 22 times [2021-07-13 19:16:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:09,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633508295] [2021-07-13 19:16:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633508295] [2021-07-13 19:16:09,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633508295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896569695] [2021-07-13 19:16:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:09,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:09,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:16:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896569695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:09,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 19:16:09,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644824281] [2021-07-13 19:16:09,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:09,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:09,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:09,930 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:10,048 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-07-13 19:16:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:10,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:16:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:10,049 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:16:10,049 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:16:10,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:16:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-07-13 19:16:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 83 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-07-13 19:16:10,051 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-07-13 19:16:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:10,052 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-07-13 19:16:10,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-07-13 19:16:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:16:10,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:10,052 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:10,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:16:10,268 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash 285571430, now seen corresponding path program 23 times [2021-07-13 19:16:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:10,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24846477] [2021-07-13 19:16:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:10,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:10,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24846477] [2021-07-13 19:16:10,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24846477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299271448] [2021-07-13 19:16:10,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:10,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299271448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:10,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:16:10,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330058119] [2021-07-13 19:16:10,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:10,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:10,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:10,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:10,345 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:16:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:10,381 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-07-13 19:16:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 [2021-07-13 19:16:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:10,382 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:16:10,382 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:16:10,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:16:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-07-13 19:16:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-07-13 19:16:10,386 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-07-13 19:16:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:10,386 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-07-13 19:16:10,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-07-13 19:16:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-07-13 19:16:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:16:10,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:10,387 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:10,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:10,593 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1118463878, now seen corresponding path program 24 times [2021-07-13 19:16:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:10,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558755341] [2021-07-13 19:16:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:10,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558755341] [2021-07-13 19:16:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558755341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908200172] [2021-07-13 19:16:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-07-13 19:16:10,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:16:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:10,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:10,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:10,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:10,732 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 [2021-07-13 19:16:10,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:10,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:10,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:10,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:16:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908200172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:10,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-13 19:16:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090411653] [2021-07-13 19:16:10,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:10,773 INFO L87 Difference]: Start difference. First operand 168 states and 440 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) [2021-07-13 19:16:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:10,822 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-07-13 19:16:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:10,822 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 15 [2021-07-13 19:16:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:10,823 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:16:10,823 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:16:10,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:16:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-07-13 19:16:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-07-13 19:16:10,827 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-07-13 19:16:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:10,827 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-07-13 19:16:10,827 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) [2021-07-13 19:16:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-07-13 19:16:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:16:10,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:10,828 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:11,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:16:11,043 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash -678148380, now seen corresponding path program 25 times [2021-07-13 19:16:11,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:11,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977238062] [2021-07-13 19:16:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:11,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:11,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977238062] [2021-07-13 19:16:11,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977238062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37409188] [2021-07-13 19:16:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:11,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:11,208 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 [2021-07-13 19:16:11,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:11,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:11,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:11,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:16:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37409188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:11,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-13 19:16:11,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055164503] [2021-07-13 19:16:11,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:11,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:11,285 INFO L87 Difference]: Start difference. First operand 196 states and 520 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) [2021-07-13 19:16:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:11,359 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-07-13 19:16:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:11,359 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 15 [2021-07-13 19:16:11,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:11,361 INFO L225 Difference]: With dead ends: 296 [2021-07-13 19:16:11,361 INFO L226 Difference]: Without dead ends: 292 [2021-07-13 19:16:11,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-13 19:16:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-07-13 19:16:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-07-13 19:16:11,366 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-07-13 19:16:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:11,366 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-07-13 19:16:11,366 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) [2021-07-13 19:16:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-07-13 19:16:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:16:11,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:11,367 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:11,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:16:11,581 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -519315694, now seen corresponding path program 26 times [2021-07-13 19:16:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:11,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533897412] [2021-07-13 19:16:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:11,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:11,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533897412] [2021-07-13 19:16:11,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533897412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109748362] [2021-07-13 19:16:11,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:11,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:11,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:11,747 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 [2021-07-13 19:16:11,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:11,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:11,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:11,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:16:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:11,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109748362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:11,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-13 19:16:11,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525840611] [2021-07-13 19:16:11,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:11,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:11,789 INFO L87 Difference]: Start difference. First operand 224 states and 622 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) [2021-07-13 19:16:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:11,861 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-07-13 19:16:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:11,861 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 15 [2021-07-13 19:16:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:11,863 INFO L225 Difference]: With dead ends: 353 [2021-07-13 19:16:11,863 INFO L226 Difference]: Without dead ends: 349 [2021-07-13 19:16:11,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-07-13 19:16:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-07-13 19:16:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-07-13 19:16:11,869 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-07-13 19:16:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:11,869 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-07-13 19:16:11,869 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) [2021-07-13 19:16:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-07-13 19:16:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:16:11,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:11,870 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:12,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:16:12,086 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash 109530276, now seen corresponding path program 27 times [2021-07-13 19:16:12,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:12,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746669328] [2021-07-13 19:16:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:12,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:12,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746669328] [2021-07-13 19:16:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746669328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:12,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765454126] [2021-07-13 19:16:12,112 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:12,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:12,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:12,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:12,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:12,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:12,218 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 [2021-07-13 19:16:12,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:12,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:12,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:12,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:16:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:12,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765454126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:12,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:12,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-13 19:16:12,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663950208] [2021-07-13 19:16:12,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:12,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:12,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:12,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:12,251 INFO L87 Difference]: Start difference. First operand 269 states and 779 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) [2021-07-13 19:16:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:12,319 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-07-13 19:16:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:12,320 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 15 [2021-07-13 19:16:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:12,321 INFO L225 Difference]: With dead ends: 397 [2021-07-13 19:16:12,322 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:16:12,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:16:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-07-13 19:16:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 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) [2021-07-13 19:16:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-07-13 19:16:12,328 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-07-13 19:16:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:12,329 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-07-13 19:16:12,329 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) [2021-07-13 19:16:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-07-13 19:16:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:16:12,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:12,331 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:12,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:12,547 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:12,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:12,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1871081134, now seen corresponding path program 28 times [2021-07-13 19:16:12,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:12,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71805045] [2021-07-13 19:16:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:12,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71805045] [2021-07-13 19:16:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71805045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915969677] [2021-07-13 19:16:12,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:12,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:12,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:12,707 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 [2021-07-13 19:16:12,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:12,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:12,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:12,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:16:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:12,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915969677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:12,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:12,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-13 19:16:12,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602669022] [2021-07-13 19:16:12,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:12,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:12,773 INFO L87 Difference]: Start difference. First operand 318 states and 938 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) [2021-07-13 19:16:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:12,843 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-07-13 19:16:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:12,843 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 15 [2021-07-13 19:16:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:12,845 INFO L225 Difference]: With dead ends: 427 [2021-07-13 19:16:12,845 INFO L226 Difference]: Without dead ends: 424 [2021-07-13 19:16:12,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:12,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-13 19:16:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-07-13 19:16:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-07-13 19:16:12,854 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-07-13 19:16:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:12,854 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-07-13 19:16:12,854 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) [2021-07-13 19:16:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-07-13 19:16:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:12,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:12,855 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:13,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:16:13,071 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash 335713551, now seen corresponding path program 29 times [2021-07-13 19:16:13,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:13,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543593221] [2021-07-13 19:16:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:13,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:13,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543593221] [2021-07-13 19:16:13,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543593221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577010621] [2021-07-13 19:16:13,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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) [2021-07-13 19:16:13,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:16:13,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:13,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:13,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577010621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:13,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:16:13,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470903879] [2021-07-13 19:16:13,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:13,184 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-07-13 19:16:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:13,300 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-07-13 19:16:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:13,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:13,302 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:16:13,302 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:16:13,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:16:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-07-13 19:16:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-07-13 19:16:13,310 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-07-13 19:16:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-07-13 19:16:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-07-13 19:16:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-07-13 19:16:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:13,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:13,311 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:13,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:13,527 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2034224775, now seen corresponding path program 30 times [2021-07-13 19:16:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:13,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315435669] [2021-07-13 19:16:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:13,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315435669] [2021-07-13 19:16:13,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315435669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604682576] [2021-07-13 19:16:13,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:13,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:16:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:13,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604682576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:13,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748756123] [2021-07-13 19:16:13,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:13,649 INFO L87 Difference]: Start difference. First operand 372 states and 1107 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) [2021-07-13 19:16:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:13,689 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-07-13 19:16:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:13,690 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 16 [2021-07-13 19:16:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:13,691 INFO L225 Difference]: With dead ends: 490 [2021-07-13 19:16:13,692 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:16:13,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:16:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-07-13 19:16:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-07-13 19:16:13,701 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-07-13 19:16:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:13,702 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-07-13 19:16:13,702 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) [2021-07-13 19:16:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-07-13 19:16:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:13,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:13,703 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:13,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 19:16:13,919 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash 475308401, now seen corresponding path program 31 times [2021-07-13 19:16:13,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:13,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801328675] [2021-07-13 19:16:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:13,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:13,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801328675] [2021-07-13 19:16:13,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801328675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824326361] [2021-07-13 19:16:13,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:14,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824326361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:14,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078817007] [2021-07-13 19:16:14,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:14,030 INFO L87 Difference]: Start difference. First operand 352 states and 1034 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) [2021-07-13 19:16:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:14,098 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-07-13 19:16:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:14,098 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 16 [2021-07-13 19:16:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:14,100 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:16:14,100 INFO L226 Difference]: Without dead ends: 464 [2021-07-13 19:16:14,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-13 19:16:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-07-13 19:16:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-07-13 19:16:14,107 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-07-13 19:16:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:14,107 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-07-13 19:16:14,108 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) [2021-07-13 19:16:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-07-13 19:16:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:14,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:14,108 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:14,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-07-13 19:16:14,322 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:14,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2101909835, now seen corresponding path program 32 times [2021-07-13 19:16:14,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:14,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687318407] [2021-07-13 19:16:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:14,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:14,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687318407] [2021-07-13 19:16:14,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687318407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961183794] [2021-07-13 19:16:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:14,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:14,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:14,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961183794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:14,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:14,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442530073] [2021-07-13 19:16:14,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:14,430 INFO L87 Difference]: Start difference. First operand 360 states and 1057 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) [2021-07-13 19:16:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:14,469 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-07-13 19:16:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:14,469 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 16 [2021-07-13 19:16:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:14,471 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:16:14,471 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:16:14,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:16:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-07-13 19:16:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-07-13 19:16:14,478 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-07-13 19:16:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:14,478 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-07-13 19:16:14,478 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) [2021-07-13 19:16:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-07-13 19:16:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:14,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:14,479 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:14,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:14,695 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 464010127, now seen corresponding path program 33 times [2021-07-13 19:16:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:14,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178094132] [2021-07-13 19:16:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:14,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:14,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178094132] [2021-07-13 19:16:14,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178094132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136898809] [2021-07-13 19:16:14,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:14,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:14,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136898809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:14,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:16:14,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170894257] [2021-07-13 19:16:14,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:14,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:14,827 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:14,900 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-07-13 19:16:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:14,903 INFO L225 Difference]: With dead ends: 535 [2021-07-13 19:16:14,903 INFO L226 Difference]: Without dead ends: 535 [2021-07-13 19:16:14,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-13 19:16:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-07-13 19:16:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-07-13 19:16:14,913 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-07-13 19:16:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:14,913 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-07-13 19:16:14,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-07-13 19:16:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:14,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:14,913 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:15,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-13 19:16:15,129 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1104154371, now seen corresponding path program 34 times [2021-07-13 19:16:15,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:15,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779536189] [2021-07-13 19:16:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:15,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:15,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779536189] [2021-07-13 19:16:15,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779536189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259371294] [2021-07-13 19:16:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:15,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:15,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259371294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:15,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:15,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929907040] [2021-07-13 19:16:15,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:15,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:15,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:15,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:15,264 INFO L87 Difference]: Start difference. First operand 337 states and 974 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) [2021-07-13 19:16:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:15,335 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-07-13 19:16:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:15,335 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 16 [2021-07-13 19:16:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:15,337 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:16:15,337 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 19:16:15,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 19:16:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-07-13 19:16:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-07-13 19:16:15,345 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-07-13 19:16:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:15,345 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-07-13 19:16:15,345 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) [2021-07-13 19:16:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-07-13 19:16:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:15,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:15,346 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:15,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:15,562 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1473063865, now seen corresponding path program 35 times [2021-07-13 19:16:15,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:15,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349994420] [2021-07-13 19:16:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:15,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349994420] [2021-07-13 19:16:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349994420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188029326] [2021-07-13 19:16:15,596 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 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 [2021-07-13 19:16:15,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:15,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188029326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:15,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:15,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002277313] [2021-07-13 19:16:15,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:15,653 INFO L87 Difference]: Start difference. First operand 348 states and 1004 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) [2021-07-13 19:16:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:15,687 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-07-13 19:16:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:15,688 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 16 [2021-07-13 19:16:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:15,689 INFO L225 Difference]: With dead ends: 447 [2021-07-13 19:16:15,689 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 19:16:15,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 19:16:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-07-13 19:16:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-07-13 19:16:15,697 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-07-13 19:16:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:15,697 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-07-13 19:16:15,697 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) [2021-07-13 19:16:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-07-13 19:16:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:15,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:15,698 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:15,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 19:16:15,914 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1092856097, now seen corresponding path program 36 times [2021-07-13 19:16:15,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:15,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500522279] [2021-07-13 19:16:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500522279] [2021-07-13 19:16:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500522279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163538903] [2021-07-13 19:16:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:16:15,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:16,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163538903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:16,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671121094] [2021-07-13 19:16:16,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:16,029 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:16,079 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-07-13 19:16:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:16,081 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:16:16,081 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:16:16,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:16:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-07-13 19:16:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-07-13 19:16:16,088 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-07-13 19:16:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:16,088 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-07-13 19:16:16,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-07-13 19:16:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:16,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:16,089 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:16,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-13 19:16:16,305 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash -968003705, now seen corresponding path program 37 times [2021-07-13 19:16:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:16,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001470677] [2021-07-13 19:16:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:16,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001470677] [2021-07-13 19:16:16,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001470677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667183759] [2021-07-13 19:16:16,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667183759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:16,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858159592] [2021-07-13 19:16:16,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:16,402 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:16,478 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-07-13 19:16:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:16,480 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:16:16,480 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:16:16,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:16:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-07-13 19:16:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-07-13 19:16:16,487 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-07-13 19:16:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:16,488 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-07-13 19:16:16,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-07-13 19:16:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:16,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:16,489 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:16,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,704 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash -557719857, now seen corresponding path program 38 times [2021-07-13 19:16:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434490709] [2021-07-13 19:16:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:16,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434490709] [2021-07-13 19:16:16,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434490709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229095037] [2021-07-13 19:16:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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) [2021-07-13 19:16:16,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:16,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:16,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229095037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:16,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:16,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650678225] [2021-07-13 19:16:16,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:16,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:16,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:16,814 INFO L87 Difference]: Start difference. First operand 382 states and 1122 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) [2021-07-13 19:16:16,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:16,903 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-07-13 19:16:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:16,904 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 16 [2021-07-13 19:16:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:16,905 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:16:16,905 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:16:16,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:16:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-07-13 19:16:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-07-13 19:16:16,912 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-07-13 19:16:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:16,913 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-07-13 19:16:16,913 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) [2021-07-13 19:16:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-07-13 19:16:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:16,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:16,915 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:17,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 19:16:17,131 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1852698447, now seen corresponding path program 39 times [2021-07-13 19:16:17,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:17,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674408052] [2021-07-13 19:16:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:17,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:17,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674408052] [2021-07-13 19:16:17,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674408052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:17,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422128304] [2021-07-13 19:16:17,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:17,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:17,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422128304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:17,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:17,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057613304] [2021-07-13 19:16:17,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:17,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:17,279 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:17,351 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-07-13 19:16:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:17,354 INFO L225 Difference]: With dead ends: 566 [2021-07-13 19:16:17,354 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:16:17,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:16:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-07-13 19:16:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-07-13 19:16:17,361 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-07-13 19:16:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:17,362 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-07-13 19:16:17,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-07-13 19:16:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:17,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:17,363 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:17,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:17,579 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:17,579 INFO L82 PathProgramCache]: Analyzing trace with hash -876457039, now seen corresponding path program 40 times [2021-07-13 19:16:17,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:17,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574192603] [2021-07-13 19:16:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:17,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:17,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574192603] [2021-07-13 19:16:17,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574192603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:17,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276615221] [2021-07-13 19:16:17,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:17,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:17,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276615221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:17,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:17,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:17,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281252222] [2021-07-13 19:16:17,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:17,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:17,679 INFO L87 Difference]: Start difference. First operand 372 states and 1082 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) [2021-07-13 19:16:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:17,781 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-07-13 19:16:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:17,781 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 16 [2021-07-13 19:16:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:17,783 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:16:17,783 INFO L226 Difference]: Without dead ends: 467 [2021-07-13 19:16:17,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-07-13 19:16:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-07-13 19:16:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-07-13 19:16:17,789 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-07-13 19:16:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:17,789 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-07-13 19:16:17,789 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) [2021-07-13 19:16:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-07-13 19:16:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:17,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:17,790 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:17,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:16:17,991 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash 841292021, now seen corresponding path program 41 times [2021-07-13 19:16:17,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:17,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268612778] [2021-07-13 19:16:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:18,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:18,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268612778] [2021-07-13 19:16:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268612778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039135000] [2021-07-13 19:16:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:18,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:18,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:18,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039135000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:18,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:18,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012111606] [2021-07-13 19:16:18,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:18,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:18,122 INFO L87 Difference]: Start difference. First operand 379 states and 1102 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) [2021-07-13 19:16:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:18,175 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-07-13 19:16:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:18,175 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 16 [2021-07-13 19:16:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:18,177 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:16:18,177 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:16:18,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:16:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-07-13 19:16:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-07-13 19:16:18,184 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-07-13 19:16:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:18,184 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-07-13 19:16:18,184 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) [2021-07-13 19:16:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-07-13 19:16:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:18,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:18,185 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:18,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:18,399 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash -887755313, now seen corresponding path program 42 times [2021-07-13 19:16:18,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:18,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197618052] [2021-07-13 19:16:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:18,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:18,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197618052] [2021-07-13 19:16:18,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197618052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629649867] [2021-07-13 19:16:18,434 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 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 [2021-07-13 19:16:18,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:18,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629649867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:18,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:16:18,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785771188] [2021-07-13 19:16:18,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:18,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:18,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:18,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:18,495 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:18,543 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-07-13 19:16:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:18,544 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:16:18,544 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:16:18,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:16:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-07-13 19:16:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-07-13 19:16:18,551 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-07-13 19:16:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:18,567 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-07-13 19:16:18,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-07-13 19:16:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:18,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:18,568 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:18,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:18,784 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1346352181, now seen corresponding path program 43 times [2021-07-13 19:16:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:18,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627332413] [2021-07-13 19:16:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:18,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:18,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627332413] [2021-07-13 19:16:18,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627332413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716649846] [2021-07-13 19:16:18,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:18,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716649846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:18,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:16:18,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327162303] [2021-07-13 19:16:18,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:18,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:18,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:18,876 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-07-13 19:16:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:18,942 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-07-13 19:16:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:18,944 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:16:18,944 INFO L226 Difference]: Without dead ends: 466 [2021-07-13 19:16:18,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-13 19:16:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-07-13 19:16:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-07-13 19:16:18,950 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-07-13 19:16:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:18,950 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-07-13 19:16:18,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-07-13 19:16:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-07-13 19:16:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:18,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:18,951 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:19,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:19,166 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1884207759, now seen corresponding path program 44 times [2021-07-13 19:16:19,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:19,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773602259] [2021-07-13 19:16:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:19,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773602259] [2021-07-13 19:16:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773602259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654212569] [2021-07-13 19:16:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:19,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:19,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:19,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654212569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:19,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:16:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778154429] [2021-07-13 19:16:19,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:19,288 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-07-13 19:16:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:19,396 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-07-13 19:16:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:16:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:19,398 INFO L225 Difference]: With dead ends: 533 [2021-07-13 19:16:19,398 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 19:16:19,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 19:16:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-07-13 19:16:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-07-13 19:16:19,404 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-07-13 19:16:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:19,404 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-07-13 19:16:19,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2021-07-13 19:16:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-07-13 19:16:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:19,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:19,405 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:19,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:19,621 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash 984700935, now seen corresponding path program 45 times [2021-07-13 19:16:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:19,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559868598] [2021-07-13 19:16:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:19,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:19,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559868598] [2021-07-13 19:16:19,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559868598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606622611] [2021-07-13 19:16:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:19,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:19,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:19,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606622611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:19,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:16:19,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242122647] [2021-07-13 19:16:19,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:19,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:19,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:19,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:19,721 INFO L87 Difference]: Start difference. First operand 403 states and 1174 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) [2021-07-13 19:16:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:19,842 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-07-13 19:16:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:19,842 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 16 [2021-07-13 19:16:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:19,844 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:16:19,844 INFO L226 Difference]: Without dead ends: 485 [2021-07-13 19:16:19,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-13 19:16:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-07-13 19:16:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-07-13 19:16:19,851 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-07-13 19:16:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:19,851 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-07-13 19:16:19,851 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) [2021-07-13 19:16:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-07-13 19:16:19,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:19,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:19,852 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:20,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 19:16:20,065 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -868338745, now seen corresponding path program 46 times [2021-07-13 19:16:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:20,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840486010] [2021-07-13 19:16:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:20,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:20,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840486010] [2021-07-13 19:16:20,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840486010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:20,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326520975] [2021-07-13 19:16:20,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:20,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:20,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:20,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326520975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:20,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:20,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:16:20,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833025178] [2021-07-13 19:16:20,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:20,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:20,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:20,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:20,178 INFO L87 Difference]: Start difference. First operand 391 states and 1131 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) [2021-07-13 19:16:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:20,339 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-07-13 19:16:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:20,340 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 16 [2021-07-13 19:16:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:20,341 INFO L225 Difference]: With dead ends: 523 [2021-07-13 19:16:20,341 INFO L226 Difference]: Without dead ends: 523 [2021-07-13 19:16:20,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-07-13 19:16:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-07-13 19:16:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 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) [2021-07-13 19:16:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-07-13 19:16:20,349 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-07-13 19:16:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:20,349 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-07-13 19:16:20,349 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) [2021-07-13 19:16:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-07-13 19:16:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:20,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:20,350 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:20,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:20,565 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2145868605, now seen corresponding path program 47 times [2021-07-13 19:16:20,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:20,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426532168] [2021-07-13 19:16:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:20,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:20,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426532168] [2021-07-13 19:16:20,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426532168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:20,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195518210] [2021-07-13 19:16:20,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:20,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:16:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:20,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195518210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:20,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:20,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-07-13 19:16:20,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950846289] [2021-07-13 19:16:20,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:20,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:20,663 INFO L87 Difference]: Start difference. First operand 386 states and 1114 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) [2021-07-13 19:16:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:20,755 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-07-13 19:16:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:20,755 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 16 [2021-07-13 19:16:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:20,756 INFO L225 Difference]: With dead ends: 454 [2021-07-13 19:16:20,756 INFO L226 Difference]: Without dead ends: 452 [2021-07-13 19:16:20,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-07-13 19:16:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-07-13 19:16:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-07-13 19:16:20,763 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-07-13 19:16:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:20,763 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-07-13 19:16:20,763 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) [2021-07-13 19:16:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-07-13 19:16:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:20,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:20,764 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:20,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:20,980 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash -428119545, now seen corresponding path program 48 times [2021-07-13 19:16:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:20,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621804192] [2021-07-13 19:16:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:21,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621804192] [2021-07-13 19:16:21,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621804192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373096894] [2021-07-13 19:16:21,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:21,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:21,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373096894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-07-13 19:16:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315477624] [2021-07-13 19:16:21,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:21,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:21,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:21,080 INFO L87 Difference]: Start difference. First operand 395 states and 1142 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) [2021-07-13 19:16:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:21,158 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-07-13 19:16:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:21,159 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 16 [2021-07-13 19:16:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:21,160 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:16:21,160 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:16:21,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:16:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-07-13 19:16:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-07-13 19:16:21,168 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-07-13 19:16:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:21,168 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-07-13 19:16:21,168 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) [2021-07-13 19:16:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-07-13 19:16:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:21,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:21,169 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:21,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 19:16:21,384 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2137800417, now seen corresponding path program 49 times [2021-07-13 19:16:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:21,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422671573] [2021-07-13 19:16:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:21,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:21,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422671573] [2021-07-13 19:16:21,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422671573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455170629] [2021-07-13 19:16:21,428 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:21,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455170629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:21,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 19:16:21,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863666479] [2021-07-13 19:16:21,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:21,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:21,536 INFO L87 Difference]: Start difference. First operand 396 states and 1143 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) [2021-07-13 19:16:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:21,627 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-07-13 19:16:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:21,628 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 16 [2021-07-13 19:16:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:21,629 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:16:21,629 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:16:21,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:16:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-07-13 19:16:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-07-13 19:16:21,636 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-07-13 19:16:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:21,636 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-07-13 19:16:21,636 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) [2021-07-13 19:16:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-07-13 19:16:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:21,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:21,637 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:21,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:21,853 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 76940615, now seen corresponding path program 50 times [2021-07-13 19:16:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:21,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225681762] [2021-07-13 19:16:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:21,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225681762] [2021-07-13 19:16:21,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225681762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675133448] [2021-07-13 19:16:21,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:21,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:21,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675133448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:21,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 19:16:21,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335598019] [2021-07-13 19:16:21,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:21,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:21,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:21,976 INFO L87 Difference]: Start difference. First operand 397 states and 1146 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) [2021-07-13 19:16:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:22,108 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-07-13 19:16:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:22,108 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 16 [2021-07-13 19:16:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:22,110 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:16:22,110 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:16:22,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:16:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-07-13 19:16:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-07-13 19:16:22,116 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-07-13 19:16:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:22,116 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-07-13 19:16:22,116 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) [2021-07-13 19:16:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-07-13 19:16:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:22,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:22,117 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:22,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:16:22,333 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 614796193, now seen corresponding path program 51 times [2021-07-13 19:16:22,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:22,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22524403] [2021-07-13 19:16:22,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:22,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:22,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22524403] [2021-07-13 19:16:22,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22524403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649074604] [2021-07-13 19:16:22,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:22,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:22,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:22,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649074604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:22,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:16:22,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540106855] [2021-07-13 19:16:22,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:22,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:22,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:22,449 INFO L87 Difference]: Start difference. First operand 420 states and 1220 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) [2021-07-13 19:16:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:22,566 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-07-13 19:16:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:22,566 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 16 [2021-07-13 19:16:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:22,568 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:16:22,568 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:16:22,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:16:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-07-13 19:16:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-07-13 19:16:22,574 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-07-13 19:16:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:22,574 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-07-13 19:16:22,574 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) [2021-07-13 19:16:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-07-13 19:16:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:16:22,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:22,575 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:22,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:16:22,791 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:22,791 INFO L82 PathProgramCache]: Analyzing trace with hash 108449927, now seen corresponding path program 52 times [2021-07-13 19:16:22,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:22,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917816020] [2021-07-13 19:16:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:22,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:22,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917816020] [2021-07-13 19:16:22,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917816020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29270021] [2021-07-13 19:16:22,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:22,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:22,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:22,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29270021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:22,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:16:22,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652586251] [2021-07-13 19:16:22,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:22,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:22,938 INFO L87 Difference]: Start difference. First operand 416 states and 1207 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) [2021-07-13 19:16:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:23,123 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-07-13 19:16:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:16:23,124 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 16 [2021-07-13 19:16:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:23,125 INFO L225 Difference]: With dead ends: 533 [2021-07-13 19:16:23,126 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 19:16:23,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:16:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 19:16:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-07-13 19:16:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-07-13 19:16:23,132 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-07-13 19:16:23,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:23,132 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-07-13 19:16:23,132 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) [2021-07-13 19:16:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-07-13 19:16:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:23,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:23,133 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:23,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:16:23,339 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1580915834, now seen corresponding path program 53 times [2021-07-13 19:16:23,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:23,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910481280] [2021-07-13 19:16:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:23,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:23,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910481280] [2021-07-13 19:16:23,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910481280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740070765] [2021-07-13 19:16:23,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:23,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:23,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740070765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:23,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 19:16:23,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12825912] [2021-07-13 19:16:23,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:23,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:23,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:23,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:23,490 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-07-13 19:16:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:23,617 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-07-13 19:16:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:23,619 INFO L225 Difference]: With dead ends: 523 [2021-07-13 19:16:23,619 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:16:23,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:16:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-07-13 19:16:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-07-13 19:16:23,625 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-07-13 19:16:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:23,625 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-07-13 19:16:23,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-07-13 19:16:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-07-13 19:16:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:23,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:23,626 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:23,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:16:23,842 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:23,842 INFO L82 PathProgramCache]: Analyzing trace with hash 237372592, now seen corresponding path program 54 times [2021-07-13 19:16:23,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:23,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259401094] [2021-07-13 19:16:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:23,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:23,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259401094] [2021-07-13 19:16:23,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259401094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694190693] [2021-07-13 19:16:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:23,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:23,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694190693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:23,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:23,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668293777] [2021-07-13 19:16:23,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:23,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:23,960 INFO L87 Difference]: Start difference. First operand 417 states and 1197 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) [2021-07-13 19:16:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:24,036 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-07-13 19:16:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:24,037 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 [2021-07-13 19:16:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:24,038 INFO L225 Difference]: With dead ends: 436 [2021-07-13 19:16:24,038 INFO L226 Difference]: Without dead ends: 434 [2021-07-13 19:16:24,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-07-13 19:16:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-07-13 19:16:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-07-13 19:16:24,066 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-07-13 19:16:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:24,066 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-07-13 19:16:24,066 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) [2021-07-13 19:16:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-07-13 19:16:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:24,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:24,067 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:24,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:16:24,282 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1705117860, now seen corresponding path program 55 times [2021-07-13 19:16:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:24,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731476340] [2021-07-13 19:16:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:24,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:24,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731476340] [2021-07-13 19:16:24,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731476340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:24,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243796056] [2021-07-13 19:16:24,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:24,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243796056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:24,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:24,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:16:24,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310318453] [2021-07-13 19:16:24,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:16:24,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:24,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:16:24,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:16:24,371 INFO L87 Difference]: Start difference. First operand 417 states and 1193 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) [2021-07-13 19:16:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:24,410 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-07-13 19:16:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:24,410 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 17 [2021-07-13 19:16:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:24,411 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:16:24,412 INFO L226 Difference]: Without dead ends: 503 [2021-07-13 19:16:24,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-13 19:16:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-07-13 19:16:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-07-13 19:16:24,417 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-07-13 19:16:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:24,418 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-07-13 19:16:24,418 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) [2021-07-13 19:16:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-07-13 19:16:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:24,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:24,418 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:24,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 19:16:24,634 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash -844394746, now seen corresponding path program 56 times [2021-07-13 19:16:24,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:24,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800430312] [2021-07-13 19:16:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:24,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800430312] [2021-07-13 19:16:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800430312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780626041] [2021-07-13 19:16:24,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:24,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:24,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780626041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:24,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:24,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:16:24,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629582664] [2021-07-13 19:16:24,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:24,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:24,715 INFO L87 Difference]: Start difference. First operand 420 states and 1200 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) [2021-07-13 19:16:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:24,772 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-07-13 19:16:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:24,772 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 17 [2021-07-13 19:16:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:24,773 INFO L225 Difference]: With dead ends: 516 [2021-07-13 19:16:24,774 INFO L226 Difference]: Without dead ends: 515 [2021-07-13 19:16:24,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-13 19:16:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-07-13 19:16:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-07-13 19:16:24,779 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-07-13 19:16:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:24,779 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-07-13 19:16:24,779 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) [2021-07-13 19:16:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-07-13 19:16:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:24,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:24,780 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:24,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:24,996 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash 866218562, now seen corresponding path program 57 times [2021-07-13 19:16:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:24,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169057552] [2021-07-13 19:16:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:25,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:25,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169057552] [2021-07-13 19:16:25,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169057552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637124298] [2021-07-13 19:16:25,032 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 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 [2021-07-13 19:16:25,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:25,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:25,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:25,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:25,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637124298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:25,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:25,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77860752] [2021-07-13 19:16:25,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:25,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:25,110 INFO L87 Difference]: Start difference. First operand 415 states and 1178 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) [2021-07-13 19:16:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:25,192 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-07-13 19:16:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:25,192 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 [2021-07-13 19:16:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:25,194 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:16:25,194 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:16:25,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:16:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-07-13 19:16:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-07-13 19:16:25,199 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-07-13 19:16:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:25,200 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-07-13 19:16:25,200 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) [2021-07-13 19:16:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-07-13 19:16:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:25,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:25,200 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:25,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:16:25,415 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1939343738, now seen corresponding path program 58 times [2021-07-13 19:16:25,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:25,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693414036] [2021-07-13 19:16:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:25,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:25,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693414036] [2021-07-13 19:16:25,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693414036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056052799] [2021-07-13 19:16:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:25,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:25,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:25,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:25,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056052799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:25,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:16:25,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701069277] [2021-07-13 19:16:25,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:25,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:25,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:25,513 INFO L87 Difference]: Start difference. First operand 412 states and 1165 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) [2021-07-13 19:16:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:25,616 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-07-13 19:16:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:25,616 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 17 [2021-07-13 19:16:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:25,617 INFO L225 Difference]: With dead ends: 478 [2021-07-13 19:16:25,617 INFO L226 Difference]: Without dead ends: 474 [2021-07-13 19:16:25,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-13 19:16:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-07-13 19:16:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-07-13 19:16:25,623 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-07-13 19:16:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:25,623 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-07-13 19:16:25,623 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) [2021-07-13 19:16:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-07-13 19:16:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:25,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:25,624 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:25,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:25,840 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash -275493550, now seen corresponding path program 59 times [2021-07-13 19:16:25,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:25,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865567677] [2021-07-13 19:16:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:25,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:25,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865567677] [2021-07-13 19:16:25,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865567677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146149107] [2021-07-13 19:16:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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) [2021-07-13 19:16:25,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:25,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146149107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:25,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:16:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446287732] [2021-07-13 19:16:25,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:25,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:25,939 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-07-13 19:16:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:25,983 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-07-13 19:16:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:16:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:25,984 INFO L225 Difference]: With dead ends: 508 [2021-07-13 19:16:25,984 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:16:25,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:16:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-07-13 19:16:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7965686274509802) internal successors, (1141), 408 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-07-13 19:16:25,991 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-07-13 19:16:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:25,991 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-07-13 19:16:25,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-07-13 19:16:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-07-13 19:16:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:25,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:25,992 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:26,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-13 19:16:26,205 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1114392848, now seen corresponding path program 60 times [2021-07-13 19:16:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889487857] [2021-07-13 19:16:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:26,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:26,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889487857] [2021-07-13 19:16:26,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889487857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474090862] [2021-07-13 19:16:26,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:26,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:26,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474090862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:26,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275730397] [2021-07-13 19:16:26,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:26,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:26,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:26,311 INFO L87 Difference]: Start difference. First operand 409 states and 1141 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) [2021-07-13 19:16:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:26,404 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-07-13 19:16:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:26,404 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 [2021-07-13 19:16:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:26,406 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:16:26,406 INFO L226 Difference]: Without dead ends: 494 [2021-07-13 19:16:26,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-13 19:16:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-07-13 19:16:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.7761194029850746) internal successors, (1116), 402 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-07-13 19:16:26,413 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-07-13 19:16:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:26,413 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-07-13 19:16:26,413 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) [2021-07-13 19:16:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-07-13 19:16:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:26,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:26,414 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:26,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:26,629 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 375012148, now seen corresponding path program 61 times [2021-07-13 19:16:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257824153] [2021-07-13 19:16:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:26,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:26,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257824153] [2021-07-13 19:16:26,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257824153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055140024] [2021-07-13 19:16:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:26,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:26,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055140024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:26,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 19:16:26,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201490852] [2021-07-13 19:16:26,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:26,769 INFO L87 Difference]: Start difference. First operand 403 states and 1116 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) [2021-07-13 19:16:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:26,858 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-07-13 19:16:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:26,859 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 17 [2021-07-13 19:16:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:26,860 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:16:26,860 INFO L226 Difference]: Without dead ends: 492 [2021-07-13 19:16:26,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-13 19:16:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-07-13 19:16:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.756218905472637) internal successors, (1108), 402 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-07-13 19:16:26,865 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-07-13 19:16:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:26,865 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-07-13 19:16:26,865 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) [2021-07-13 19:16:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-07-13 19:16:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:26,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:26,866 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:27,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:27,082 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash -698073232, now seen corresponding path program 62 times [2021-07-13 19:16:27,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:27,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922355898] [2021-07-13 19:16:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:27,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:27,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922355898] [2021-07-13 19:16:27,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922355898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380564728] [2021-07-13 19:16:27,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:27,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:27,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:27,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380564728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 19:16:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984636383] [2021-07-13 19:16:27,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:27,179 INFO L87 Difference]: Start difference. First operand 403 states and 1108 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) [2021-07-13 19:16:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:27,263 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-07-13 19:16:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:27,263 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 17 [2021-07-13 19:16:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:27,264 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:16:27,264 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:16:27,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:16:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-07-13 19:16:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7468982630272953) internal successors, (1107), 403 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-07-13 19:16:27,269 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-07-13 19:16:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:27,269 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-07-13 19:16:27,269 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) [2021-07-13 19:16:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-07-13 19:16:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:27,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:27,270 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:27,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:27,485 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash -987391290, now seen corresponding path program 63 times [2021-07-13 19:16:27,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:27,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774959509] [2021-07-13 19:16:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:27,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:27,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774959509] [2021-07-13 19:16:27,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774959509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755007355] [2021-07-13 19:16:27,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:27,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:27,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:27,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755007355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:27,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:27,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99825813] [2021-07-13 19:16:27,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:27,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:27,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:27,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:27,595 INFO L87 Difference]: Start difference. First operand 404 states and 1107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:27,654 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-07-13 19:16:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:27,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:27,655 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:16:27,655 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:16:27,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:16:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-07-13 19:16:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7475247524752477) internal successors, (1110), 404 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-07-13 19:16:27,676 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-07-13 19:16:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:27,676 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-07-13 19:16:27,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-07-13 19:16:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:27,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:27,677 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:27,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:16:27,891 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash 844347560, now seen corresponding path program 64 times [2021-07-13 19:16:27,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:27,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496983973] [2021-07-13 19:16:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:27,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496983973] [2021-07-13 19:16:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496983973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398498907] [2021-07-13 19:16:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:27,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:27,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:27,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398498907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:27,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:27,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 19:16:27,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506390425] [2021-07-13 19:16:27,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:27,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:27,999 INFO L87 Difference]: Start difference. First operand 405 states and 1110 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) [2021-07-13 19:16:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:28,091 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-07-13 19:16:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:28,092 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 17 [2021-07-13 19:16:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:28,092 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:16:28,093 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:16:28,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:16:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-07-13 19:16:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.735148514851485) internal successors, (1105), 404 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-07-13 19:16:28,098 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-07-13 19:16:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:28,098 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-07-13 19:16:28,098 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) [2021-07-13 19:16:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-07-13 19:16:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:28,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:28,099 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:28,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:16:28,315 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1544905116, now seen corresponding path program 65 times [2021-07-13 19:16:28,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:28,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967137602] [2021-07-13 19:16:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:28,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:28,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967137602] [2021-07-13 19:16:28,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967137602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070731199] [2021-07-13 19:16:28,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:28,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:28,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070731199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:28,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-13 19:16:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883900038] [2021-07-13 19:16:28,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:28,399 INFO L87 Difference]: Start difference. First operand 405 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-07-13 19:16:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:28,448 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-07-13 19:16:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:28,450 INFO L225 Difference]: With dead ends: 538 [2021-07-13 19:16:28,450 INFO L226 Difference]: Without dead ends: 538 [2021-07-13 19:16:28,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-13 19:16:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-07-13 19:16:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.743276283618582) internal successors, (1122), 409 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-07-13 19:16:28,455 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-07-13 19:16:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:28,455 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-07-13 19:16:28,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-07-13 19:16:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-07-13 19:16:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:28,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:28,456 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:28,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:16:28,672 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1911162882, now seen corresponding path program 66 times [2021-07-13 19:16:28,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:28,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150278923] [2021-07-13 19:16:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:28,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150278923] [2021-07-13 19:16:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150278923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687562458] [2021-07-13 19:16:28,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-07-13 19:16:28,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:28,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:28,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687562458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:28,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616553901] [2021-07-13 19:16:28,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:28,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:28,756 INFO L87 Difference]: Start difference. First operand 410 states and 1122 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) [2021-07-13 19:16:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:28,829 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-07-13 19:16:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:28,830 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 [2021-07-13 19:16:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:28,831 INFO L225 Difference]: With dead ends: 512 [2021-07-13 19:16:28,831 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 19:16:28,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 19:16:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-07-13 19:16:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7310513447432765) internal successors, (1117), 409 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-07-13 19:16:28,837 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-07-13 19:16:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:28,837 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-07-13 19:16:28,837 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) [2021-07-13 19:16:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-07-13 19:16:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:28,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:28,838 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:29,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:29,053 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash -894399418, now seen corresponding path program 67 times [2021-07-13 19:16:29,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:29,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338515009] [2021-07-13 19:16:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:29,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:29,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338515009] [2021-07-13 19:16:29,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338515009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382228309] [2021-07-13 19:16:29,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:29,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382228309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:29,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-07-13 19:16:29,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245288941] [2021-07-13 19:16:29,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:29,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:29,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:29,139 INFO L87 Difference]: Start difference. First operand 410 states and 1117 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) [2021-07-13 19:16:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:29,225 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-07-13 19:16:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:29,225 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 17 [2021-07-13 19:16:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:29,226 INFO L225 Difference]: With dead ends: 518 [2021-07-13 19:16:29,226 INFO L226 Difference]: Without dead ends: 514 [2021-07-13 19:16:29,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-13 19:16:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-07-13 19:16:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7163814180929093) internal successors, (1111), 409 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) [2021-07-13 19:16:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-07-13 19:16:29,232 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-07-13 19:16:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:29,232 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-07-13 19:16:29,232 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) [2021-07-13 19:16:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-07-13 19:16:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:29,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:29,233 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:29,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 19:16:29,448 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1967484798, now seen corresponding path program 68 times [2021-07-13 19:16:29,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:29,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748489749] [2021-07-13 19:16:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:29,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:29,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748489749] [2021-07-13 19:16:29,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748489749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3954042] [2021-07-13 19:16:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:29,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:29,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3954042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:29,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:16:29,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973822458] [2021-07-13 19:16:29,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:29,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:29,580 INFO L87 Difference]: Start difference. First operand 410 states and 1111 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) [2021-07-13 19:16:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:29,677 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-07-13 19:16:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:29,677 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 17 [2021-07-13 19:16:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:29,678 INFO L225 Difference]: With dead ends: 523 [2021-07-13 19:16:29,678 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:16:29,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:16:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-07-13 19:16:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7) internal successors, (1107), 410 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-07-13 19:16:29,684 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-07-13 19:16:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:29,684 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-07-13 19:16:29,684 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) [2021-07-13 19:16:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-07-13 19:16:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:29,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:29,685 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:29,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:29,901 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:29,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:29,901 INFO L82 PathProgramCache]: Analyzing trace with hash -873393210, now seen corresponding path program 69 times [2021-07-13 19:16:29,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:29,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127981941] [2021-07-13 19:16:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:29,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:29,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127981941] [2021-07-13 19:16:29,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127981941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173601310] [2021-07-13 19:16:29,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:29,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:29,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:30,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173601310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:30,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:16:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614465370] [2021-07-13 19:16:30,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:30,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:30,032 INFO L87 Difference]: Start difference. First operand 411 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2021-07-13 19:16:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:30,144 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-07-13 19:16:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:30,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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 [2021-07-13 19:16:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:30,145 INFO L225 Difference]: With dead ends: 574 [2021-07-13 19:16:30,146 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:16:30,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:16:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-07-13 19:16:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6801909307875893) internal successors, (1123), 419 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) [2021-07-13 19:16:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-07-13 19:16:30,151 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-07-13 19:16:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:30,151 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-07-13 19:16:30,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2021-07-13 19:16:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-07-13 19:16:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:30,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:30,152 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:30,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 19:16:30,368 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:30,368 INFO L82 PathProgramCache]: Analyzing trace with hash -416986994, now seen corresponding path program 70 times [2021-07-13 19:16:30,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:30,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279960810] [2021-07-13 19:16:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:30,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:30,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279960810] [2021-07-13 19:16:30,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279960810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044292242] [2021-07-13 19:16:30,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:30,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:30,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:30,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044292242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:30,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:16:30,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690178914] [2021-07-13 19:16:30,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:30,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:30,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:30,471 INFO L87 Difference]: Start difference. First operand 420 states and 1123 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) [2021-07-13 19:16:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:30,545 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-07-13 19:16:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:30,546 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 17 [2021-07-13 19:16:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:30,547 INFO L225 Difference]: With dead ends: 565 [2021-07-13 19:16:30,547 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:16:30,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:16:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-07-13 19:16:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.724604966139955) internal successors, (1207), 443 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-07-13 19:16:30,552 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-07-13 19:16:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:30,553 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-07-13 19:16:30,553 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) [2021-07-13 19:16:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-07-13 19:16:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:30,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:30,553 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:30,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:30,770 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash -302988914, now seen corresponding path program 71 times [2021-07-13 19:16:30,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:30,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278561742] [2021-07-13 19:16:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278561742] [2021-07-13 19:16:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278561742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888754394] [2021-07-13 19:16:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:30,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:30,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888754394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:30,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:30,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:16:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931524381] [2021-07-13 19:16:30,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:30,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:30,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:30,882 INFO L87 Difference]: Start difference. First operand 444 states and 1207 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) [2021-07-13 19:16:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:30,977 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-07-13 19:16:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:30,977 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 17 [2021-07-13 19:16:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:30,978 INFO L225 Difference]: With dead ends: 566 [2021-07-13 19:16:30,978 INFO L226 Difference]: Without dead ends: 558 [2021-07-13 19:16:30,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-13 19:16:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-07-13 19:16:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.7200902934537248) internal successors, (1205), 443 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-07-13 19:16:30,984 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-07-13 19:16:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:30,984 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-07-13 19:16:30,984 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) [2021-07-13 19:16:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-07-13 19:16:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:30,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:30,985 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:31,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:31,200 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:31,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2053009298, now seen corresponding path program 72 times [2021-07-13 19:16:31,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:31,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349401913] [2021-07-13 19:16:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:31,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349401913] [2021-07-13 19:16:31,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349401913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678313751] [2021-07-13 19:16:31,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:31,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:31,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:31,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:31,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678313751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:31,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:31,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-07-13 19:16:31,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51704091] [2021-07-13 19:16:31,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:31,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:31,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:31,344 INFO L87 Difference]: Start difference. First operand 444 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-07-13 19:16:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:31,397 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-07-13 19:16:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:31,398 INFO L225 Difference]: With dead ends: 642 [2021-07-13 19:16:31,398 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 19:16:31,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 19:16:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-07-13 19:16:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.788306451612903) internal successors, (1383), 496 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-07-13 19:16:31,405 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-07-13 19:16:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:31,405 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-07-13 19:16:31,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-07-13 19:16:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-07-13 19:16:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:31,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:31,406 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:31,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:31,621 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:31,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1214110000, now seen corresponding path program 73 times [2021-07-13 19:16:31,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:31,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286817528] [2021-07-13 19:16:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:31,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:31,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286817528] [2021-07-13 19:16:31,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286817528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:31,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300949159] [2021-07-13 19:16:31,667 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 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 [2021-07-13 19:16:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:31,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300949159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:31,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:31,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-07-13 19:16:31,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380468631] [2021-07-13 19:16:31,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:31,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:31,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:31,719 INFO L87 Difference]: Start difference. First operand 497 states and 1383 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) [2021-07-13 19:16:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:31,802 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-07-13 19:16:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:31,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:31,803 INFO L225 Difference]: With dead ends: 618 [2021-07-13 19:16:31,803 INFO L226 Difference]: Without dead ends: 616 [2021-07-13 19:16:31,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-07-13 19:16:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-07-13 19:16:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.784274193548387) internal successors, (1381), 496 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-07-13 19:16:31,809 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-07-13 19:16:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:31,810 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-07-13 19:16:31,810 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) [2021-07-13 19:16:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-07-13 19:16:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:31,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:31,810 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:32,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 19:16:32,026 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1591452300, now seen corresponding path program 74 times [2021-07-13 19:16:32,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:32,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449388960] [2021-07-13 19:16:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:32,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:32,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449388960] [2021-07-13 19:16:32,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449388960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180961891] [2021-07-13 19:16:32,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:32,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:32,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:32,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180961891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:32,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-07-13 19:16:32,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450706117] [2021-07-13 19:16:32,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:32,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:32,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:32,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:32,163 INFO L87 Difference]: Start difference. First operand 497 states and 1381 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) [2021-07-13 19:16:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:32,257 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-07-13 19:16:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:32,257 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 17 [2021-07-13 19:16:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:32,258 INFO L225 Difference]: With dead ends: 624 [2021-07-13 19:16:32,259 INFO L226 Difference]: Without dead ends: 620 [2021-07-13 19:16:32,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-07-13 19:16:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-07-13 19:16:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7864271457085827) internal successors, (1396), 501 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) [2021-07-13 19:16:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-07-13 19:16:32,265 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-07-13 19:16:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:32,265 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-07-13 19:16:32,265 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) [2021-07-13 19:16:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-07-13 19:16:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:32,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:32,266 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:32,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:32,480 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1630429616, now seen corresponding path program 75 times [2021-07-13 19:16:32,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:32,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581322202] [2021-07-13 19:16:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:32,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:32,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581322202] [2021-07-13 19:16:32,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581322202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116389813] [2021-07-13 19:16:32,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:32,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:32,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:32,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:16:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:32,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116389813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:32,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 19:16:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274349897] [2021-07-13 19:16:32,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:32,590 INFO L87 Difference]: Start difference. First operand 502 states and 1396 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) [2021-07-13 19:16:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:32,679 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-07-13 19:16:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:32,680 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 17 [2021-07-13 19:16:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:32,681 INFO L225 Difference]: With dead ends: 723 [2021-07-13 19:16:32,681 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 19:16:32,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 19:16:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-07-13 19:16:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7824351297405188) internal successors, (1394), 501 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-07-13 19:16:32,688 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-07-13 19:16:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:32,688 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-07-13 19:16:32,688 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) [2021-07-13 19:16:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-07-13 19:16:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:32,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:32,689 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:32,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:16:32,905 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1570446092, now seen corresponding path program 76 times [2021-07-13 19:16:32,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:32,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793378615] [2021-07-13 19:16:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:32,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:32,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793378615] [2021-07-13 19:16:32,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793378615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:32,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777169455] [2021-07-13 19:16:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:32,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:32,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777169455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:33,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:33,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 19:16:33,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210137778] [2021-07-13 19:16:33,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:33,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:33,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:33,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:33,028 INFO L87 Difference]: Start difference. First operand 502 states and 1394 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) [2021-07-13 19:16:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:33,130 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-07-13 19:16:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:33,130 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 17 [2021-07-13 19:16:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:33,131 INFO L225 Difference]: With dead ends: 736 [2021-07-13 19:16:33,132 INFO L226 Difference]: Without dead ends: 728 [2021-07-13 19:16:33,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:16:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-07-13 19:16:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-07-13 19:16:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.78019801980198) internal successors, (1404), 505 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-07-13 19:16:33,138 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-07-13 19:16:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:33,138 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-07-13 19:16:33,138 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) [2021-07-13 19:16:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-07-13 19:16:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:16:33,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:33,139 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:33,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:16:33,355 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:33,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2013345232, now seen corresponding path program 77 times [2021-07-13 19:16:33,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:33,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764620434] [2021-07-13 19:16:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:33,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764620434] [2021-07-13 19:16:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764620434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570066218] [2021-07-13 19:16:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:33,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:33,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:33,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570066218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:33,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:33,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 19:16:33,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275596481] [2021-07-13 19:16:33,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:33,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:33,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:33,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:33,479 INFO L87 Difference]: Start difference. First operand 506 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:33,577 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-07-13 19:16:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:16:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:33,579 INFO L225 Difference]: With dead ends: 575 [2021-07-13 19:16:33,579 INFO L226 Difference]: Without dead ends: 570 [2021-07-13 19:16:33,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-13 19:16:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-07-13 19:16:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.778217821782178) internal successors, (1403), 505 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-07-13 19:16:33,585 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-07-13 19:16:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:33,587 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-07-13 19:16:33,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-07-13 19:16:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:33,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:33,588 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:33,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:33,804 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1740678897, now seen corresponding path program 78 times [2021-07-13 19:16:33,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:33,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068879200] [2021-07-13 19:16:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:33,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068879200] [2021-07-13 19:16:33,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068879200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:33,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737262446] [2021-07-13 19:16:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:33,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:33,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:33,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:34,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:34,039 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 [2021-07-13 19:16:34,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:34,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:34,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:34,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:34,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737262446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:34,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:34,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:34,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483247983] [2021-07-13 19:16:34,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:34,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:34,259 INFO L87 Difference]: Start difference. First operand 506 states and 1403 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:34,379 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-07-13 19:16:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:34,381 INFO L225 Difference]: With dead ends: 610 [2021-07-13 19:16:34,381 INFO L226 Difference]: Without dead ends: 607 [2021-07-13 19:16:34,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-13 19:16:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-07-13 19:16:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.792134831460674) internal successors, (1491), 534 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-07-13 19:16:34,387 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-07-13 19:16:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:34,387 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-07-13 19:16:34,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-07-13 19:16:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:34,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:34,388 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:34,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:34,605 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1612382321, now seen corresponding path program 79 times [2021-07-13 19:16:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:34,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982787393] [2021-07-13 19:16:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:34,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982787393] [2021-07-13 19:16:34,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982787393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945047838] [2021-07-13 19:16:34,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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) [2021-07-13 19:16:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:34,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:34,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:34,844 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 [2021-07-13 19:16:35,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:35,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:35,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:35,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:35,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945047838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:35,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:35,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503113593] [2021-07-13 19:16:35,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:35,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:35,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:35,045 INFO L87 Difference]: Start difference. First operand 535 states and 1491 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:35,163 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-07-13 19:16:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:35,165 INFO L225 Difference]: With dead ends: 674 [2021-07-13 19:16:35,165 INFO L226 Difference]: Without dead ends: 671 [2021-07-13 19:16:35,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-13 19:16:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-07-13 19:16:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.836236933797909) internal successors, (1628), 574 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-07-13 19:16:35,172 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-07-13 19:16:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:35,172 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-07-13 19:16:35,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-07-13 19:16:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:35,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:35,173 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:35,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:35,390 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1250571143, now seen corresponding path program 80 times [2021-07-13 19:16:35,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:35,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244408463] [2021-07-13 19:16:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:35,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244408463] [2021-07-13 19:16:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244408463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238222313] [2021-07-13 19:16:35,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:35,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:35,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:35,604 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 [2021-07-13 19:16:35,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:35,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:35,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:35,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:35,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238222313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:35,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627442675] [2021-07-13 19:16:35,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:35,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:35,944 INFO L87 Difference]: Start difference. First operand 575 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:36,072 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-07-13 19:16:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:36,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:36,074 INFO L225 Difference]: With dead ends: 731 [2021-07-13 19:16:36,074 INFO L226 Difference]: Without dead ends: 728 [2021-07-13 19:16:36,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-07-13 19:16:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-07-13 19:16:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.8894308943089433) internal successors, (1777), 615 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-07-13 19:16:36,082 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-07-13 19:16:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:36,082 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-07-13 19:16:36,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-07-13 19:16:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:36,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:36,083 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:36,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:16:36,299 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash -192184689, now seen corresponding path program 81 times [2021-07-13 19:16:36,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:36,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322549765] [2021-07-13 19:16:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:36,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322549765] [2021-07-13 19:16:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322549765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348044842] [2021-07-13 19:16:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:36,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:36,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:36,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:36,510 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 [2021-07-13 19:16:36,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:36,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:36,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:36,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:36,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348044842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:36,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:36,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:36,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187481439] [2021-07-13 19:16:36,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:36,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:36,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:36,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:36,762 INFO L87 Difference]: Start difference. First operand 616 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:36,913 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-07-13 19:16:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:36,915 INFO L225 Difference]: With dead ends: 778 [2021-07-13 19:16:36,915 INFO L226 Difference]: Without dead ends: 775 [2021-07-13 19:16:36,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-07-13 19:16:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-07-13 19:16:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9376899696048633) internal successors, (1933), 658 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-07-13 19:16:36,924 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-07-13 19:16:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:36,924 INFO L482 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-07-13 19:16:36,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-07-13 19:16:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:36,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:36,925 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:37,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-07-13 19:16:37,141 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:37,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1967942521, now seen corresponding path program 82 times [2021-07-13 19:16:37,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:37,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71536778] [2021-07-13 19:16:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:37,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71536778] [2021-07-13 19:16:37,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71536778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630405818] [2021-07-13 19:16:37,175 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 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 [2021-07-13 19:16:37,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:37,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:37,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:37,349 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 [2021-07-13 19:16:37,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:37,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:37,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:37,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:37,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630405818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:37,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537285205] [2021-07-13 19:16:37,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:37,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:37,473 INFO L87 Difference]: Start difference. First operand 659 states and 1933 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:37,622 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-07-13 19:16:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:37,624 INFO L225 Difference]: With dead ends: 823 [2021-07-13 19:16:37,624 INFO L226 Difference]: Without dead ends: 820 [2021-07-13 19:16:37,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-13 19:16:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-07-13 19:16:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.985974754558205) internal successors, (2129), 713 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-07-13 19:16:37,635 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-07-13 19:16:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:37,635 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-07-13 19:16:37,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-07-13 19:16:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:37,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:37,637 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:37,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:37,852 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1181860465, now seen corresponding path program 83 times [2021-07-13 19:16:37,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:37,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827124613] [2021-07-13 19:16:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:37,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827124613] [2021-07-13 19:16:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827124613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253341919] [2021-07-13 19:16:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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) [2021-07-13 19:16:37,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:38,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:38,064 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 [2021-07-13 19:16:38,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:38,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:38,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:38,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:38,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253341919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:38,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:38,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:38,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155347852] [2021-07-13 19:16:38,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:38,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:38,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:38,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:38,214 INFO L87 Difference]: Start difference. First operand 714 states and 2129 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:38,333 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-07-13 19:16:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:38,335 INFO L225 Difference]: With dead ends: 908 [2021-07-13 19:16:38,335 INFO L226 Difference]: Without dead ends: 905 [2021-07-13 19:16:38,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-07-13 19:16:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-07-13 19:16:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.0) internal successors, (2397), 799 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-07-13 19:16:38,346 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-07-13 19:16:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:38,346 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-07-13 19:16:38,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-07-13 19:16:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:16:38,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:38,348 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:38,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 19:16:38,563 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1711846791, now seen corresponding path program 84 times [2021-07-13 19:16:38,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:38,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423050127] [2021-07-13 19:16:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:38,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423050127] [2021-07-13 19:16:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423050127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:38,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710697489] [2021-07-13 19:16:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:16:38,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:16:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:38,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:38,813 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 [2021-07-13 19:16:38,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:38,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:38,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:38,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:16:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:38,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710697489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:38,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:38,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:16:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549663837] [2021-07-13 19:16:38,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:16:38,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:38,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:16:38,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:38,977 INFO L87 Difference]: Start difference. First operand 800 states and 2397 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:39,093 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-07-13 19:16:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:16:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:39,095 INFO L225 Difference]: With dead ends: 974 [2021-07-13 19:16:39,096 INFO L226 Difference]: Without dead ends: 971 [2021-07-13 19:16:39,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-07-13 19:16:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-07-13 19:16:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.0114810562571757) internal successors, (2623), 871 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-07-13 19:16:39,107 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-07-13 19:16:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:39,107 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-07-13 19:16:39,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-07-13 19:16:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:39,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:39,108 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:39,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:39,324 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1937782575, now seen corresponding path program 85 times [2021-07-13 19:16:39,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:39,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807958301] [2021-07-13 19:16:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:39,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:39,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807958301] [2021-07-13 19:16:39,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807958301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400970965] [2021-07-13 19:16:39,383 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 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 [2021-07-13 19:16:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400970965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:39,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:16:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623667541] [2021-07-13 19:16:39,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:39,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:39,470 INFO L87 Difference]: Start difference. First operand 872 states and 2623 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:39,620 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-07-13 19:16:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:39,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-07-13 19:16:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:39,622 INFO L225 Difference]: With dead ends: 993 [2021-07-13 19:16:39,622 INFO L226 Difference]: Without dead ends: 993 [2021-07-13 19:16:39,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-07-13 19:16:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-07-13 19:16:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0069204152249136) internal successors, (2607), 867 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-07-13 19:16:39,633 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-07-13 19:16:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:39,633 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-07-13 19:16:39,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-07-13 19:16:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:39,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:39,634 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:39,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-07-13 19:16:39,849 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1896600742, now seen corresponding path program 86 times [2021-07-13 19:16:39,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:39,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948048487] [2021-07-13 19:16:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:39,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:39,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948048487] [2021-07-13 19:16:39,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948048487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402397277] [2021-07-13 19:16:39,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:39,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:39,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:39,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:39,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402397277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:39,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:16:39,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423548519] [2021-07-13 19:16:39,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:39,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:39,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:39,964 INFO L87 Difference]: Start difference. First operand 868 states and 2607 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:40,135 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-07-13 19:16:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:16:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-07-13 19:16:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:40,137 INFO L225 Difference]: With dead ends: 1076 [2021-07-13 19:16:40,137 INFO L226 Difference]: Without dead ends: 1067 [2021-07-13 19:16:40,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:16:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-13 19:16:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-07-13 19:16:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.994350282485876) internal successors, (2650), 885 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-07-13 19:16:40,166 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-07-13 19:16:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:40,166 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-07-13 19:16:40,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-07-13 19:16:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:40,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:40,168 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:40,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-07-13 19:16:40,384 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash -483433455, now seen corresponding path program 87 times [2021-07-13 19:16:40,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:40,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010392423] [2021-07-13 19:16:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:40,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:40,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010392423] [2021-07-13 19:16:40,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010392423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:40,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246068721] [2021-07-13 19:16:40,426 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 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 [2021-07-13 19:16:40,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:40,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:40,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:40,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246068721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:40,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:40,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:40,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191008964] [2021-07-13 19:16:40,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:40,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:40,486 INFO L87 Difference]: Start difference. First operand 886 states and 2650 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) [2021-07-13 19:16:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:40,577 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-07-13 19:16:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:40,577 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 19 [2021-07-13 19:16:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:40,579 INFO L225 Difference]: With dead ends: 917 [2021-07-13 19:16:40,579 INFO L226 Difference]: Without dead ends: 916 [2021-07-13 19:16:40,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-07-13 19:16:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-07-13 19:16:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.992090395480226) internal successors, (2648), 885 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-07-13 19:16:40,590 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-07-13 19:16:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:40,590 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-07-13 19:16:40,590 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) [2021-07-13 19:16:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-07-13 19:16:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:40,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:40,592 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:40,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:40,805 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash 433622898, now seen corresponding path program 88 times [2021-07-13 19:16:40,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:40,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33702833] [2021-07-13 19:16:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:40,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33702833] [2021-07-13 19:16:40,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33702833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:40,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362308687] [2021-07-13 19:16:40,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:40,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:40,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:40,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362308687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:40,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:40,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:40,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626044473] [2021-07-13 19:16:40,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:40,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:40,931 INFO L87 Difference]: Start difference. First operand 886 states and 2648 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) [2021-07-13 19:16:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:40,978 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-07-13 19:16:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:40,978 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 19 [2021-07-13 19:16:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:40,980 INFO L225 Difference]: With dead ends: 1091 [2021-07-13 19:16:40,980 INFO L226 Difference]: Without dead ends: 1091 [2021-07-13 19:16:40,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-07-13 19:16:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-07-13 19:16:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-07-13 19:16:40,991 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-07-13 19:16:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:40,991 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-07-13 19:16:40,991 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) [2021-07-13 19:16:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-07-13 19:16:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:40,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:40,993 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:41,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:41,208 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 634065319, now seen corresponding path program 89 times [2021-07-13 19:16:41,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:41,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696953394] [2021-07-13 19:16:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:41,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:41,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696953394] [2021-07-13 19:16:41,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696953394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:41,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491791555] [2021-07-13 19:16:41,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:41,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:16:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:41,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491791555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:41,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:41,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:41,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243935175] [2021-07-13 19:16:41,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:41,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:41,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:41,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:41,307 INFO L87 Difference]: Start difference. First operand 869 states and 2583 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) [2021-07-13 19:16:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:41,380 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-07-13 19:16:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:41,381 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 19 [2021-07-13 19:16:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:41,383 INFO L225 Difference]: With dead ends: 1088 [2021-07-13 19:16:41,383 INFO L226 Difference]: Without dead ends: 1088 [2021-07-13 19:16:41,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-07-13 19:16:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-07-13 19:16:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.9844097995545655) internal successors, (2680), 898 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-07-13 19:16:41,395 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-07-13 19:16:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:41,395 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-07-13 19:16:41,395 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) [2021-07-13 19:16:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-07-13 19:16:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:41,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:41,397 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:41,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-13 19:16:41,613 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1578827302, now seen corresponding path program 90 times [2021-07-13 19:16:41,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:41,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940700005] [2021-07-13 19:16:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:41,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940700005] [2021-07-13 19:16:41,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940700005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:41,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707587938] [2021-07-13 19:16:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:41,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:41,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707587938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:41,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:41,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:41,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161115681] [2021-07-13 19:16:41,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:41,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:41,705 INFO L87 Difference]: Start difference. First operand 899 states and 2680 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) [2021-07-13 19:16:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:41,804 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-07-13 19:16:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:41,804 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 19 [2021-07-13 19:16:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:41,806 INFO L225 Difference]: With dead ends: 1083 [2021-07-13 19:16:41,806 INFO L226 Difference]: Without dead ends: 1081 [2021-07-13 19:16:41,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-07-13 19:16:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-07-13 19:16:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.987858719646799) internal successors, (2707), 906 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-07-13 19:16:41,819 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-07-13 19:16:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:41,819 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-07-13 19:16:41,819 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) [2021-07-13 19:16:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-07-13 19:16:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:41,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:41,820 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 19:16:42,036 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1915447287, now seen corresponding path program 91 times [2021-07-13 19:16:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661140639] [2021-07-13 19:16:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:42,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:42,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661140639] [2021-07-13 19:16:42,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661140639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755699727] [2021-07-13 19:16:42,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:42,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755699727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:42,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398396177] [2021-07-13 19:16:42,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:42,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:42,196 INFO L87 Difference]: Start difference. First operand 907 states and 2707 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) [2021-07-13 19:16:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:42,303 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-07-13 19:16:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:42,303 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 19 [2021-07-13 19:16:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:42,305 INFO L225 Difference]: With dead ends: 1039 [2021-07-13 19:16:42,305 INFO L226 Difference]: Without dead ends: 1037 [2021-07-13 19:16:42,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-07-13 19:16:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-07-13 19:16:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9750849377123445) internal successors, (2627), 883 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-07-13 19:16:42,316 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-07-13 19:16:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:42,317 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-07-13 19:16:42,317 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) [2021-07-13 19:16:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-07-13 19:16:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:42,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:42,318 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:42,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:42,534 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:42,534 INFO L82 PathProgramCache]: Analyzing trace with hash -998390934, now seen corresponding path program 92 times [2021-07-13 19:16:42,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:42,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271752593] [2021-07-13 19:16:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:42,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:42,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271752593] [2021-07-13 19:16:42,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271752593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348106272] [2021-07-13 19:16:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:42,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:42,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:42,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:42,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348106272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:42,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:42,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026392496] [2021-07-13 19:16:42,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:42,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:42,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:42,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:42,629 INFO L87 Difference]: Start difference. First operand 884 states and 2627 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) [2021-07-13 19:16:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:42,673 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-07-13 19:16:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:42,673 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 19 [2021-07-13 19:16:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:42,675 INFO L225 Difference]: With dead ends: 1108 [2021-07-13 19:16:42,675 INFO L226 Difference]: Without dead ends: 1108 [2021-07-13 19:16:42,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-13 19:16:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-07-13 19:16:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9729119638826185) internal successors, (2634), 886 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-07-13 19:16:42,715 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-07-13 19:16:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:42,715 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-07-13 19:16:42,715 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) [2021-07-13 19:16:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-07-13 19:16:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:42,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:42,716 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:42,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-07-13 19:16:42,917 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash -204833979, now seen corresponding path program 93 times [2021-07-13 19:16:42,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:42,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898772622] [2021-07-13 19:16:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:42,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:42,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898772622] [2021-07-13 19:16:42,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898772622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722633668] [2021-07-13 19:16:42,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:43,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:16:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:16:43,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722633668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:43,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:43,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-07-13 19:16:43,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223842892] [2021-07-13 19:16:43,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:16:43,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:16:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:43,103 INFO L87 Difference]: Start difference. First operand 887 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-13 19:16:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:43,626 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-07-13 19:16:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 19:16:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 [2021-07-13 19:16:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:43,630 INFO L225 Difference]: With dead ends: 2007 [2021-07-13 19:16:43,630 INFO L226 Difference]: Without dead ends: 1998 [2021-07-13 19:16:43,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:16:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-07-13 19:16:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-07-13 19:16:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.930515759312321) internal successors, (4091), 1396 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-07-13 19:16:43,651 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-07-13 19:16:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:43,652 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-07-13 19:16:43,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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) [2021-07-13 19:16:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-07-13 19:16:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:43,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:43,654 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:43,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:43,864 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1567529028, now seen corresponding path program 94 times [2021-07-13 19:16:43,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:43,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612964583] [2021-07-13 19:16:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:43,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:43,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612964583] [2021-07-13 19:16:43,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612964583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:43,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215803047] [2021-07-13 19:16:43,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:43,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:43,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:43,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:43,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215803047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:43,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:43,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:16:43,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112273911] [2021-07-13 19:16:43,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:43,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:43,984 INFO L87 Difference]: Start difference. First operand 1397 states and 4091 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) [2021-07-13 19:16:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:44,053 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-07-13 19:16:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:44,054 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 19 [2021-07-13 19:16:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:44,056 INFO L225 Difference]: With dead ends: 1816 [2021-07-13 19:16:44,056 INFO L226 Difference]: Without dead ends: 1816 [2021-07-13 19:16:44,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-07-13 19:16:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-07-13 19:16:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9140969162995596) internal successors, (3969), 1362 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-07-13 19:16:44,076 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-07-13 19:16:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:44,077 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-07-13 19:16:44,077 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) [2021-07-13 19:16:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-07-13 19:16:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:44,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:44,078 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:44,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-13 19:16:44,294 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 136071470, now seen corresponding path program 95 times [2021-07-13 19:16:44,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:44,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220416513] [2021-07-13 19:16:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:44,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:44,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220416513] [2021-07-13 19:16:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220416513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:44,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999174693] [2021-07-13 19:16:44,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:44,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:16:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999174693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157960276] [2021-07-13 19:16:44,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:44,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:44,387 INFO L87 Difference]: Start difference. First operand 1363 states and 3969 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) [2021-07-13 19:16:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:44,485 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-07-13 19:16:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:44,485 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 19 [2021-07-13 19:16:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:44,488 INFO L225 Difference]: With dead ends: 1590 [2021-07-13 19:16:44,488 INFO L226 Difference]: Without dead ends: 1588 [2021-07-13 19:16:44,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-07-13 19:16:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-07-13 19:16:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.9134545454545453) internal successors, (4006), 1375 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-07-13 19:16:44,506 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-07-13 19:16:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:44,507 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-07-13 19:16:44,507 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) [2021-07-13 19:16:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-07-13 19:16:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:44,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:44,510 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:44,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-07-13 19:16:44,726 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:44,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1853820530, now seen corresponding path program 96 times [2021-07-13 19:16:44,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:44,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621854747] [2021-07-13 19:16:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:44,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621854747] [2021-07-13 19:16:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621854747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010162211] [2021-07-13 19:16:44,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:44,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:44,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010162211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:44,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:44,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:44,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035696480] [2021-07-13 19:16:44,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:44,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:44,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:44,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:44,820 INFO L87 Difference]: Start difference. First operand 1376 states and 4006 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) [2021-07-13 19:16:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:44,863 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-07-13 19:16:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:44,864 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 19 [2021-07-13 19:16:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:44,866 INFO L225 Difference]: With dead ends: 1582 [2021-07-13 19:16:44,866 INFO L226 Difference]: Without dead ends: 1582 [2021-07-13 19:16:44,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-07-13 19:16:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-07-13 19:16:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.9021339220014717) internal successors, (3944), 1359 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-07-13 19:16:44,887 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-07-13 19:16:44,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:44,887 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-07-13 19:16:44,887 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) [2021-07-13 19:16:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-07-13 19:16:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:44,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:44,889 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:45,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:45,105 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 124773196, now seen corresponding path program 97 times [2021-07-13 19:16:45,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:45,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593694513] [2021-07-13 19:16:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:45,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:45,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593694513] [2021-07-13 19:16:45,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593694513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:45,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019378258] [2021-07-13 19:16:45,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:45,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019378258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:45,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:45,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:45,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981792198] [2021-07-13 19:16:45,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:45,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:45,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:45,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:45,200 INFO L87 Difference]: Start difference. First operand 1360 states and 3944 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) [2021-07-13 19:16:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:45,261 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-07-13 19:16:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:45,262 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 19 [2021-07-13 19:16:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:45,264 INFO L225 Difference]: With dead ends: 1713 [2021-07-13 19:16:45,264 INFO L226 Difference]: Without dead ends: 1713 [2021-07-13 19:16:45,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-07-13 19:16:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-07-13 19:16:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9023494860499266) internal successors, (3953), 1362 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) [2021-07-13 19:16:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-07-13 19:16:45,302 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-07-13 19:16:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:45,302 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-07-13 19:16:45,302 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) [2021-07-13 19:16:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-07-13 19:16:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:45,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:45,304 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:45,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:45,517 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:45,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086606, now seen corresponding path program 98 times [2021-07-13 19:16:45,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:45,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770875491] [2021-07-13 19:16:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:45,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:45,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770875491] [2021-07-13 19:16:45,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770875491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:45,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893050459] [2021-07-13 19:16:45,561 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 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 [2021-07-13 19:16:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:45,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893050459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:45,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:45,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:45,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404388796] [2021-07-13 19:16:45,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:45,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:45,616 INFO L87 Difference]: Start difference. First operand 1363 states and 3953 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) [2021-07-13 19:16:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:45,703 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-07-13 19:16:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:45,703 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 19 [2021-07-13 19:16:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:45,706 INFO L225 Difference]: With dead ends: 2155 [2021-07-13 19:16:45,707 INFO L226 Difference]: Without dead ends: 2155 [2021-07-13 19:16:45,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-07-13 19:16:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-07-13 19:16:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.983030303030303) internal successors, (4922), 1650 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-07-13 19:16:45,732 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-07-13 19:16:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:45,732 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-07-13 19:16:45,732 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) [2021-07-13 19:16:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-07-13 19:16:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:45,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:45,734 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:45,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-07-13 19:16:45,950 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1320949180, now seen corresponding path program 99 times [2021-07-13 19:16:45,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:45,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485456817] [2021-07-13 19:16:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:45,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:45,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485456817] [2021-07-13 19:16:45,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485456817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:45,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083215705] [2021-07-13 19:16:45,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:46,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:46,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:46,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083215705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:46,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:16:46,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071738522] [2021-07-13 19:16:46,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:46,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:46,037 INFO L87 Difference]: Start difference. First operand 1651 states and 4922 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) [2021-07-13 19:16:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:46,132 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-07-13 19:16:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:46,132 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 19 [2021-07-13 19:16:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:46,135 INFO L225 Difference]: With dead ends: 1877 [2021-07-13 19:16:46,135 INFO L226 Difference]: Without dead ends: 1873 [2021-07-13 19:16:46,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-07-13 19:16:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-07-13 19:16:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.9958871915393654) internal successors, (5099), 1702 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-07-13 19:16:46,158 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-07-13 19:16:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:46,158 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-07-13 19:16:46,158 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) [2021-07-13 19:16:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-07-13 19:16:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:46,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:46,161 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:46,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-07-13 19:16:46,376 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1089469124, now seen corresponding path program 100 times [2021-07-13 19:16:46,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:46,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18128320] [2021-07-13 19:16:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:46,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18128320] [2021-07-13 19:16:46,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18128320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090897446] [2021-07-13 19:16:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:46,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:46,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090897446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:46,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:46,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272099750] [2021-07-13 19:16:46,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:46,477 INFO L87 Difference]: Start difference. First operand 1703 states and 5099 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) [2021-07-13 19:16:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:46,558 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-07-13 19:16:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:46,559 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 19 [2021-07-13 19:16:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:46,562 INFO L225 Difference]: With dead ends: 2270 [2021-07-13 19:16:46,562 INFO L226 Difference]: Without dead ends: 2270 [2021-07-13 19:16:46,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-07-13 19:16:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-07-13 19:16:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.9396306818181817) internal successors, (4139), 1408 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-07-13 19:16:46,583 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-07-13 19:16:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:46,584 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-07-13 19:16:46,584 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) [2021-07-13 19:16:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-07-13 19:16:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:46,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:46,585 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:46,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-13 19:16:46,801 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1639686362, now seen corresponding path program 101 times [2021-07-13 19:16:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170791551] [2021-07-13 19:16:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:46,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:46,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170791551] [2021-07-13 19:16:46,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170791551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597224507] [2021-07-13 19:16:46,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:46,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:16:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:46,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:46,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:46,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597224507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:46,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083469733] [2021-07-13 19:16:46,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:46,889 INFO L87 Difference]: Start difference. First operand 1409 states and 4139 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) [2021-07-13 19:16:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:46,985 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-07-13 19:16:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:46,985 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 19 [2021-07-13 19:16:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:46,987 INFO L225 Difference]: With dead ends: 1616 [2021-07-13 19:16:46,987 INFO L226 Difference]: Without dead ends: 1612 [2021-07-13 19:16:46,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-07-13 19:16:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-07-13 19:16:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9281092739036665) internal successors, (4073), 1391 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-07-13 19:16:47,026 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-07-13 19:16:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:47,026 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-07-13 19:16:47,026 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) [2021-07-13 19:16:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-07-13 19:16:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:47,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:47,027 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:47,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-13 19:16:47,243 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash 78062698, now seen corresponding path program 102 times [2021-07-13 19:16:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:47,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607137583] [2021-07-13 19:16:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:47,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:47,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607137583] [2021-07-13 19:16:47,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607137583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:47,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215486261] [2021-07-13 19:16:47,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:47,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:47,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215486261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:47,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:47,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:47,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654384364] [2021-07-13 19:16:47,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:47,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:47,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:47,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:47,364 INFO L87 Difference]: Start difference. First operand 1392 states and 4073 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) [2021-07-13 19:16:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:47,415 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-07-13 19:16:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:47,415 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 19 [2021-07-13 19:16:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:47,417 INFO L225 Difference]: With dead ends: 1671 [2021-07-13 19:16:47,417 INFO L226 Difference]: Without dead ends: 1671 [2021-07-13 19:16:47,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-07-13 19:16:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-07-13 19:16:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.923132183908046) internal successors, (4069), 1392 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-07-13 19:16:47,434 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-07-13 19:16:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:47,434 INFO L482 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-07-13 19:16:47,434 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) [2021-07-13 19:16:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-07-13 19:16:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:47,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:47,436 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:47,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-07-13 19:16:47,661 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1650984636, now seen corresponding path program 103 times [2021-07-13 19:16:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112518874] [2021-07-13 19:16:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:47,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112518874] [2021-07-13 19:16:47,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112518874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:47,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347577542] [2021-07-13 19:16:47,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347577542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:47,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:47,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:16:47,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023633828] [2021-07-13 19:16:47,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:47,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:47,761 INFO L87 Difference]: Start difference. First operand 1393 states and 4069 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) [2021-07-13 19:16:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:47,815 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-07-13 19:16:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:47,816 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 19 [2021-07-13 19:16:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:47,818 INFO L225 Difference]: With dead ends: 1578 [2021-07-13 19:16:47,818 INFO L226 Difference]: Without dead ends: 1578 [2021-07-13 19:16:47,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-07-13 19:16:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-07-13 19:16:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.9084194977843425) internal successors, (3938), 1354 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-07-13 19:16:47,835 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-07-13 19:16:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:47,835 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-07-13 19:16:47,835 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) [2021-07-13 19:16:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-07-13 19:16:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:47,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:47,837 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:48,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-07-13 19:16:48,052 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 583122858, now seen corresponding path program 104 times [2021-07-13 19:16:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:48,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293159082] [2021-07-13 19:16:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:48,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:48,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293159082] [2021-07-13 19:16:48,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293159082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:48,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732625441] [2021-07-13 19:16:48,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:48,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:48,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:48,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732625441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:48,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:48,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:16:48,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100102290] [2021-07-13 19:16:48,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:48,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:48,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:48,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:48,220 INFO L87 Difference]: Start difference. First operand 1355 states and 3938 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) [2021-07-13 19:16:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:48,304 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-07-13 19:16:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:48,305 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 19 [2021-07-13 19:16:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:48,307 INFO L225 Difference]: With dead ends: 1698 [2021-07-13 19:16:48,307 INFO L226 Difference]: Without dead ends: 1698 [2021-07-13 19:16:48,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-07-13 19:16:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-07-13 19:16:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8821263482280433) internal successors, (3741), 1298 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-07-13 19:16:48,324 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-07-13 19:16:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:48,324 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-07-13 19:16:48,324 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) [2021-07-13 19:16:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-07-13 19:16:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:48,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:48,326 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:48,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-07-13 19:16:48,542 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1120978436, now seen corresponding path program 105 times [2021-07-13 19:16:48,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:48,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193646597] [2021-07-13 19:16:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:48,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193646597] [2021-07-13 19:16:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193646597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:48,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762161867] [2021-07-13 19:16:48,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:48,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:16:48,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:48,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762161867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:48,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:48,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:16:48,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519912923] [2021-07-13 19:16:48,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:48,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:48,669 INFO L87 Difference]: Start difference. First operand 1299 states and 3741 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) [2021-07-13 19:16:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:48,786 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-07-13 19:16:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:48,787 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 19 [2021-07-13 19:16:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:48,789 INFO L225 Difference]: With dead ends: 2138 [2021-07-13 19:16:48,789 INFO L226 Difference]: Without dead ends: 2138 [2021-07-13 19:16:48,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-07-13 19:16:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-07-13 19:16:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.952286282306163) internal successors, (4455), 1509 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-07-13 19:16:48,810 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-07-13 19:16:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:48,810 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-07-13 19:16:48,810 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) [2021-07-13 19:16:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-07-13 19:16:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:48,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:48,812 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:49,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:49,027 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash 423925554, now seen corresponding path program 106 times [2021-07-13 19:16:49,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:49,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380184752] [2021-07-13 19:16:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:49,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:49,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380184752] [2021-07-13 19:16:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380184752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488546411] [2021-07-13 19:16:49,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:16:49,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:49,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:49,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:49,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488546411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:49,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:49,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111522819] [2021-07-13 19:16:49,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:49,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:49,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:49,174 INFO L87 Difference]: Start difference. First operand 1510 states and 4455 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) [2021-07-13 19:16:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:49,279 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-07-13 19:16:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:49,279 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 19 [2021-07-13 19:16:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:49,282 INFO L225 Difference]: With dead ends: 1994 [2021-07-13 19:16:49,282 INFO L226 Difference]: Without dead ends: 1994 [2021-07-13 19:16:49,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-07-13 19:16:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-07-13 19:16:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.891358024691358) internal successors, (3513), 1215 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-07-13 19:16:49,299 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-07-13 19:16:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:49,299 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-07-13 19:16:49,299 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) [2021-07-13 19:16:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-07-13 19:16:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:49,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:49,301 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:49,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:49,516 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -853604306, now seen corresponding path program 107 times [2021-07-13 19:16:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:49,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999793760] [2021-07-13 19:16:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:49,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:49,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999793760] [2021-07-13 19:16:49,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999793760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437155915] [2021-07-13 19:16:49,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:49,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:49,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:49,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437155915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:49,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:49,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243805244] [2021-07-13 19:16:49,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:49,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:49,626 INFO L87 Difference]: Start difference. First operand 1216 states and 3513 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) [2021-07-13 19:16:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:49,719 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-07-13 19:16:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:49,719 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 19 [2021-07-13 19:16:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:49,721 INFO L225 Difference]: With dead ends: 1394 [2021-07-13 19:16:49,721 INFO L226 Difference]: Without dead ends: 1390 [2021-07-13 19:16:49,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-13 19:16:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-07-13 19:16:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8705583756345177) internal successors, (3393), 1182 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-07-13 19:16:49,736 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-07-13 19:16:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:49,736 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-07-13 19:16:49,736 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) [2021-07-13 19:16:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-07-13 19:16:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:49,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:49,737 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:49,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:49,953 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 864144754, now seen corresponding path program 108 times [2021-07-13 19:16:49,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:49,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166142147] [2021-07-13 19:16:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:49,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:49,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166142147] [2021-07-13 19:16:49,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166142147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552012905] [2021-07-13 19:16:49,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:16:50,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:16:50,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:50,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:50,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552012905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:50,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:50,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009788794] [2021-07-13 19:16:50,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:50,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:50,072 INFO L87 Difference]: Start difference. First operand 1183 states and 3393 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) [2021-07-13 19:16:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:50,129 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-07-13 19:16:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:50,129 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 19 [2021-07-13 19:16:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:50,131 INFO L225 Difference]: With dead ends: 1453 [2021-07-13 19:16:50,131 INFO L226 Difference]: Without dead ends: 1453 [2021-07-13 19:16:50,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-07-13 19:16:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-07-13 19:16:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8678451178451176) internal successors, (3407), 1188 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-07-13 19:16:50,145 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-07-13 19:16:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:50,145 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-07-13 19:16:50,145 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) [2021-07-13 19:16:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-07-13 19:16:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:50,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:50,147 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:50,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:50,362 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash -864902580, now seen corresponding path program 109 times [2021-07-13 19:16:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:50,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820349932] [2021-07-13 19:16:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:50,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:50,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820349932] [2021-07-13 19:16:50,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820349932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335029428] [2021-07-13 19:16:50,403 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 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 [2021-07-13 19:16:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:50,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335029428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:50,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:50,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375339706] [2021-07-13 19:16:50,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:50,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:50,458 INFO L87 Difference]: Start difference. First operand 1189 states and 3407 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) [2021-07-13 19:16:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:50,525 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-07-13 19:16:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:50,525 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 19 [2021-07-13 19:16:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:50,527 INFO L225 Difference]: With dead ends: 1449 [2021-07-13 19:16:50,527 INFO L226 Difference]: Without dead ends: 1449 [2021-07-13 19:16:50,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-07-13 19:16:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-07-13 19:16:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.845814977973568) internal successors, (3230), 1135 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-07-13 19:16:50,541 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-07-13 19:16:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:50,541 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-07-13 19:16:50,541 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) [2021-07-13 19:16:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-07-13 19:16:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:50,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:50,543 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:50,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-13 19:16:50,759 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:50,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1369204914, now seen corresponding path program 110 times [2021-07-13 19:16:50,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:50,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716153659] [2021-07-13 19:16:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:50,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:50,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716153659] [2021-07-13 19:16:50,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716153659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006788755] [2021-07-13 19:16:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:50,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:50,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006788755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:50,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:50,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697999875] [2021-07-13 19:16:50,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:50,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:50,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:50,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:50,855 INFO L87 Difference]: Start difference. First operand 1136 states and 3230 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) [2021-07-13 19:16:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:50,909 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-07-13 19:16:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:50,909 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 19 [2021-07-13 19:16:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:50,911 INFO L225 Difference]: With dead ends: 1670 [2021-07-13 19:16:50,911 INFO L226 Difference]: Without dead ends: 1670 [2021-07-13 19:16:50,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-13 19:16:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-07-13 19:16:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.888359428182437) internal successors, (4243), 1469 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-07-13 19:16:50,953 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-07-13 19:16:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:50,953 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-07-13 19:16:50,954 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) [2021-07-13 19:16:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-07-13 19:16:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:50,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:50,955 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:51,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-13 19:16:51,171 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1907060492, now seen corresponding path program 111 times [2021-07-13 19:16:51,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:51,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999514998] [2021-07-13 19:16:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:51,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:51,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999514998] [2021-07-13 19:16:51,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999514998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:51,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991906311] [2021-07-13 19:16:51,225 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 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 [2021-07-13 19:16:51,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:16:51,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:51,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991906311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:51,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:51,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:51,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858480315] [2021-07-13 19:16:51,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:51,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:51,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:51,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:51,288 INFO L87 Difference]: Start difference. First operand 1470 states and 4243 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) [2021-07-13 19:16:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:51,387 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-07-13 19:16:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:51,388 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 19 [2021-07-13 19:16:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:51,390 INFO L225 Difference]: With dead ends: 1718 [2021-07-13 19:16:51,390 INFO L226 Difference]: Without dead ends: 1718 [2021-07-13 19:16:51,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-07-13 19:16:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-07-13 19:16:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.879543834640057) internal successors, (4040), 1403 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-07-13 19:16:51,412 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-07-13 19:16:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:51,412 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-07-13 19:16:51,412 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) [2021-07-13 19:16:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-07-13 19:16:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:51,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:51,414 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:51,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-13 19:16:51,630 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1400714226, now seen corresponding path program 112 times [2021-07-13 19:16:51,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:51,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89772008] [2021-07-13 19:16:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:51,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:51,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89772008] [2021-07-13 19:16:51,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89772008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:51,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329118997] [2021-07-13 19:16:51,683 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 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 [2021-07-13 19:16:51,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:51,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329118997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:51,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:51,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:51,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025245141] [2021-07-13 19:16:51,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:51,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:51,738 INFO L87 Difference]: Start difference. First operand 1404 states and 4040 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) [2021-07-13 19:16:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:51,896 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-07-13 19:16:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:16:51,896 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 19 [2021-07-13 19:16:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:51,898 INFO L225 Difference]: With dead ends: 1961 [2021-07-13 19:16:51,898 INFO L226 Difference]: Without dead ends: 1961 [2021-07-13 19:16:51,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:16:51,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-07-13 19:16:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-07-13 19:16:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.933617539585871) internal successors, (4817), 1642 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-07-13 19:16:51,918 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-07-13 19:16:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:51,919 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-07-13 19:16:51,919 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) [2021-07-13 19:16:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-07-13 19:16:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:51,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:51,921 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:52,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-13 19:16:52,137 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1043037158, now seen corresponding path program 113 times [2021-07-13 19:16:52,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140796835] [2021-07-13 19:16:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:52,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:52,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140796835] [2021-07-13 19:16:52,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140796835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:52,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258032831] [2021-07-13 19:16:52,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:52,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:52,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:52,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258032831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:52,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:52,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:52,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819498392] [2021-07-13 19:16:52,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:52,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:52,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:52,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:52,232 INFO L87 Difference]: Start difference. First operand 1643 states and 4817 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) [2021-07-13 19:16:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:52,362 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-07-13 19:16:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:16:52,362 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 19 [2021-07-13 19:16:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:52,365 INFO L225 Difference]: With dead ends: 1862 [2021-07-13 19:16:52,365 INFO L226 Difference]: Without dead ends: 1856 [2021-07-13 19:16:52,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-07-13 19:16:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-07-13 19:16:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.9414225941422596) internal successors, (4921), 1673 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-07-13 19:16:52,385 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-07-13 19:16:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:52,385 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-07-13 19:16:52,385 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) [2021-07-13 19:16:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-07-13 19:16:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:52,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:52,387 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:52,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:52,603 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1871868906, now seen corresponding path program 114 times [2021-07-13 19:16:52,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:52,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881985221] [2021-07-13 19:16:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:52,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:52,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881985221] [2021-07-13 19:16:52,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881985221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:52,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520655544] [2021-07-13 19:16:52,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:52,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:52,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:52,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520655544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:52,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:52,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:52,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562979809] [2021-07-13 19:16:52,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:52,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:52,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:52,702 INFO L87 Difference]: Start difference. First operand 1674 states and 4921 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) [2021-07-13 19:16:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:52,755 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-07-13 19:16:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:16:52,755 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 19 [2021-07-13 19:16:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:52,758 INFO L225 Difference]: With dead ends: 1907 [2021-07-13 19:16:52,758 INFO L226 Difference]: Without dead ends: 1907 [2021-07-13 19:16:52,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-07-13 19:16:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-07-13 19:16:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.9318181818181817) internal successors, (4902), 1672 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-07-13 19:16:52,778 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-07-13 19:16:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:52,778 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-07-13 19:16:52,778 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) [2021-07-13 19:16:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-07-13 19:16:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:52,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:52,781 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:52,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-13 19:16:52,997 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1885242812, now seen corresponding path program 115 times [2021-07-13 19:16:52,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:52,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016988788] [2021-07-13 19:16:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:53,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:53,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016988788] [2021-07-13 19:16:53,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016988788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333169942] [2021-07-13 19:16:53,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:53,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:53,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333169942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:53,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:53,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578249020] [2021-07-13 19:16:53,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:53,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:53,124 INFO L87 Difference]: Start difference. First operand 1673 states and 4902 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) [2021-07-13 19:16:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:53,216 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-07-13 19:16:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:53,216 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 19 [2021-07-13 19:16:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:53,219 INFO L225 Difference]: With dead ends: 1965 [2021-07-13 19:16:53,219 INFO L226 Difference]: Without dead ends: 1965 [2021-07-13 19:16:53,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-07-13 19:16:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-07-13 19:16:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.888731396172927) internal successors, (4076), 1411 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-07-13 19:16:53,244 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-07-13 19:16:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:53,244 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-07-13 19:16:53,244 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) [2021-07-13 19:16:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-07-13 19:16:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:53,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:53,245 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:53,462 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1903378218, now seen corresponding path program 116 times [2021-07-13 19:16:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103082346] [2021-07-13 19:16:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:53,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:53,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103082346] [2021-07-13 19:16:53,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103082346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576999571] [2021-07-13 19:16:53,515 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 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 [2021-07-13 19:16:53,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:53,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:53,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:53,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576999571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:53,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:53,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950326739] [2021-07-13 19:16:53,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:53,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:53,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:53,573 INFO L87 Difference]: Start difference. First operand 1412 states and 4076 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) [2021-07-13 19:16:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:53,734 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-07-13 19:16:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:16:53,734 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 19 [2021-07-13 19:16:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:53,737 INFO L225 Difference]: With dead ends: 1975 [2021-07-13 19:16:53,737 INFO L226 Difference]: Without dead ends: 1975 [2021-07-13 19:16:53,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:16:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-07-13 19:16:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-07-13 19:16:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.9010115606936417) internal successors, (4015), 1384 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) [2021-07-13 19:16:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-07-13 19:16:53,755 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-07-13 19:16:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:53,755 INFO L482 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-07-13 19:16:53,755 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) [2021-07-13 19:16:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-07-13 19:16:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:53,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:53,758 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:53,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-07-13 19:16:53,974 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2143162372, now seen corresponding path program 117 times [2021-07-13 19:16:53,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:53,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665523707] [2021-07-13 19:16:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665523707] [2021-07-13 19:16:54,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665523707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405273355] [2021-07-13 19:16:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:16:54,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:54,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405273355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:54,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:54,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938124308] [2021-07-13 19:16:54,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:54,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:54,107 INFO L87 Difference]: Start difference. First operand 1385 states and 4015 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) [2021-07-13 19:16:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,214 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-07-13 19:16:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:54,214 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 19 [2021-07-13 19:16:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,216 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 19:16:54,216 INFO L226 Difference]: Without dead ends: 1513 [2021-07-13 19:16:54,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-07-13 19:16:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-07-13 19:16:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.897026831036983) internal successors, (3995), 1379 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-07-13 19:16:54,233 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-07-13 19:16:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,233 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-07-13 19:16:54,233 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) [2021-07-13 19:16:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-07-13 19:16:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:54,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,235 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:54,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-07-13 19:16:54,451 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1266911364, now seen corresponding path program 118 times [2021-07-13 19:16:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:54,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048105324] [2021-07-13 19:16:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048105324] [2021-07-13 19:16:54,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048105324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338811631] [2021-07-13 19:16:54,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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) [2021-07-13 19:16:54,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:54,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:54,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338811631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:54,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:16:54,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49292351] [2021-07-13 19:16:54,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:54,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:54,664 INFO L87 Difference]: Start difference. First operand 1380 states and 3995 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,869 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-07-13 19:16:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-07-13 19:16:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,872 INFO L225 Difference]: With dead ends: 1622 [2021-07-13 19:16:54,872 INFO L226 Difference]: Without dead ends: 1622 [2021-07-13 19:16:54,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:16:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-07-13 19:16:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-07-13 19:16:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8721311475409834) internal successors, (3504), 1220 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-07-13 19:16:54,902 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-07-13 19:16:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,902 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-07-13 19:16:54,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-07-13 19:16:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:54,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,904 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:55,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,120 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2040102950, now seen corresponding path program 119 times [2021-07-13 19:16:55,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:55,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536904534] [2021-07-13 19:16:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536904534] [2021-07-13 19:16:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536904534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439612472] [2021-07-13 19:16:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:55,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:55,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:55,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439612472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:55,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:55,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977200125] [2021-07-13 19:16:55,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:55,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:55,214 INFO L87 Difference]: Start difference. First operand 1221 states and 3504 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) [2021-07-13 19:16:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:55,309 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-07-13 19:16:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:55,309 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 19 [2021-07-13 19:16:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:55,311 INFO L225 Difference]: With dead ends: 1376 [2021-07-13 19:16:55,311 INFO L226 Difference]: Without dead ends: 1372 [2021-07-13 19:16:55,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-13 19:16:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-07-13 19:16:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.873170731707317) internal successors, (3534), 1230 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-07-13 19:16:55,343 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-07-13 19:16:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:55,344 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-07-13 19:16:55,344 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) [2021-07-13 19:16:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-07-13 19:16:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:55,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:55,345 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:55,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,561 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:55,562 INFO L82 PathProgramCache]: Analyzing trace with hash -537115286, now seen corresponding path program 120 times [2021-07-13 19:16:55,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:55,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651996215] [2021-07-13 19:16:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:55,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651996215] [2021-07-13 19:16:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651996215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741393249] [2021-07-13 19:16:55,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:55,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:55,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:55,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741393249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:55,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:55,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098986186] [2021-07-13 19:16:55,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:55,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:55,654 INFO L87 Difference]: Start difference. First operand 1231 states and 3534 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) [2021-07-13 19:16:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:55,719 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-07-13 19:16:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:55,720 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 19 [2021-07-13 19:16:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:55,722 INFO L225 Difference]: With dead ends: 1459 [2021-07-13 19:16:55,722 INFO L226 Difference]: Without dead ends: 1459 [2021-07-13 19:16:55,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-07-13 19:16:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-07-13 19:16:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8732737611697807) internal successors, (3537), 1231 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-07-13 19:16:55,737 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-07-13 19:16:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:55,737 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-07-13 19:16:55,737 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) [2021-07-13 19:16:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-07-13 19:16:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:55,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:55,739 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:55,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-07-13 19:16:55,955 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:55,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2028804676, now seen corresponding path program 121 times [2021-07-13 19:16:55,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:55,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52998941] [2021-07-13 19:16:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:55,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:55,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52998941] [2021-07-13 19:16:55,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52998941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881637106] [2021-07-13 19:16:55,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:56,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881637106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:56,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:16:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604096769] [2021-07-13 19:16:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:56,051 INFO L87 Difference]: Start difference. First operand 1232 states and 3537 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) [2021-07-13 19:16:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:56,129 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-07-13 19:16:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:56,129 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 19 [2021-07-13 19:16:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:56,131 INFO L225 Difference]: With dead ends: 1479 [2021-07-13 19:16:56,131 INFO L226 Difference]: Without dead ends: 1479 [2021-07-13 19:16:56,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-07-13 19:16:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-07-13 19:16:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.8733766233766236) internal successors, (3540), 1232 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-07-13 19:16:56,145 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-07-13 19:16:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,145 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-07-13 19:16:56,145 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) [2021-07-13 19:16:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-07-13 19:16:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:56,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:56,147 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:56,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:56,363 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -32055126, now seen corresponding path program 122 times [2021-07-13 19:16:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:56,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123451102] [2021-07-13 19:16:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:56,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123451102] [2021-07-13 19:16:56,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123451102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457918313] [2021-07-13 19:16:56,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:56,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:56,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457918313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:56,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:16:56,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984151083] [2021-07-13 19:16:56,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:56,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:56,467 INFO L87 Difference]: Start difference. First operand 1233 states and 3540 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) [2021-07-13 19:16:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:56,550 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-07-13 19:16:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:56,550 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 19 [2021-07-13 19:16:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:56,552 INFO L225 Difference]: With dead ends: 1443 [2021-07-13 19:16:56,552 INFO L226 Difference]: Without dead ends: 1443 [2021-07-13 19:16:56,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:56,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-07-13 19:16:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-07-13 19:16:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.874285714285714) internal successors, (3521), 1225 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-07-13 19:16:56,566 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-07-13 19:16:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,566 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-07-13 19:16:56,566 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) [2021-07-13 19:16:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-07-13 19:16:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:56,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:56,568 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:56,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-07-13 19:16:56,784 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:56,784 INFO L82 PathProgramCache]: Analyzing trace with hash 505800452, now seen corresponding path program 123 times [2021-07-13 19:16:56,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:56,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293090606] [2021-07-13 19:16:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:56,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:56,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293090606] [2021-07-13 19:16:56,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293090606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715231322] [2021-07-13 19:16:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:16:56,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:16:56,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:56,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715231322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:56,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:16:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758131810] [2021-07-13 19:16:56,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:56,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:56,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:56,889 INFO L87 Difference]: Start difference. First operand 1226 states and 3521 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) [2021-07-13 19:16:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:56,959 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-07-13 19:16:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:56,959 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 19 [2021-07-13 19:16:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:56,961 INFO L225 Difference]: With dead ends: 1646 [2021-07-13 19:16:56,962 INFO L226 Difference]: Without dead ends: 1646 [2021-07-13 19:16:56,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-07-13 19:16:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-07-13 19:16:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-07-13 19:16:56,978 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-07-13 19:16:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,978 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-07-13 19:16:56,978 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) [2021-07-13 19:16:56,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-07-13 19:16:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:56,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:56,980 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:57,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-13 19:16:57,196 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:57,196 INFO L82 PathProgramCache]: Analyzing trace with hash -545814, now seen corresponding path program 124 times [2021-07-13 19:16:57,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:57,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717376913] [2021-07-13 19:16:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:57,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717376913] [2021-07-13 19:16:57,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717376913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648846338] [2021-07-13 19:16:57,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:16:57,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:57,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:57,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:57,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648846338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:16:57,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477135483] [2021-07-13 19:16:57,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:57,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:57,342 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:57,480 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-07-13 19:16:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-07-13 19:16:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:57,484 INFO L225 Difference]: With dead ends: 1661 [2021-07-13 19:16:57,484 INFO L226 Difference]: Without dead ends: 1661 [2021-07-13 19:16:57,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-07-13 19:16:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-07-13 19:16:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-07-13 19:16:57,507 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-07-13 19:16:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:57,508 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-07-13 19:16:57,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-07-13 19:16:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:57,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:57,510 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:57,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-07-13 19:16:57,726 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:57,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1482589124, now seen corresponding path program 125 times [2021-07-13 19:16:57,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:57,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680499531] [2021-07-13 19:16:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:57,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680499531] [2021-07-13 19:16:57,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680499531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204962823] [2021-07-13 19:16:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:16:57,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:16:57,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:57,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204962823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:16:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852115210] [2021-07-13 19:16:57,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:57,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:57,860 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:58,055 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-07-13 19:16:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:16:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 19 [2021-07-13 19:16:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:58,059 INFO L225 Difference]: With dead ends: 1853 [2021-07-13 19:16:58,059 INFO L226 Difference]: Without dead ends: 1853 [2021-07-13 19:16:58,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:16:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-07-13 19:16:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-07-13 19:16:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.9021113243762) internal successors, (4536), 1563 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-07-13 19:16:58,081 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-07-13 19:16:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:58,081 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-07-13 19:16:58,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-07-13 19:16:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-07-13 19:16:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:58,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:58,083 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:58,297 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -554248274, now seen corresponding path program 126 times [2021-07-13 19:16:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194154813] [2021-07-13 19:16:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:58,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:58,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194154813] [2021-07-13 19:16:58,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194154813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824047964] [2021-07-13 19:16:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:16:58,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:16:58,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:58,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824047964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:58,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:16:58,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35543788] [2021-07-13 19:16:58,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:58,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:58,478 INFO L87 Difference]: Start difference. First operand 1564 states and 4536 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) [2021-07-13 19:16:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:58,650 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-07-13 19:16:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:16:58,650 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 19 [2021-07-13 19:16:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:58,653 INFO L225 Difference]: With dead ends: 1749 [2021-07-13 19:16:58,653 INFO L226 Difference]: Without dead ends: 1743 [2021-07-13 19:16:58,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:16:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-07-13 19:16:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-07-13 19:16:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.8841623036649215) internal successors, (4407), 1528 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-07-13 19:16:58,680 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-07-13 19:16:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:58,680 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-07-13 19:16:58,680 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) [2021-07-13 19:16:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-07-13 19:16:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:58,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:58,682 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:58,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-13 19:16:58,897 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1091484980, now seen corresponding path program 127 times [2021-07-13 19:16:58,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:58,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855427091] [2021-07-13 19:16:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:58,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:58,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855427091] [2021-07-13 19:16:58,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855427091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187792753] [2021-07-13 19:16:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:16:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:59,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187792753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:59,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:16:59,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212204220] [2021-07-13 19:16:59,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:59,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:59,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:59,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:59,027 INFO L87 Difference]: Start difference. First operand 1529 states and 4407 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) [2021-07-13 19:16:59,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,159 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-07-13 19:16:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:59,160 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 19 [2021-07-13 19:16:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,162 INFO L225 Difference]: With dead ends: 1732 [2021-07-13 19:16:59,162 INFO L226 Difference]: Without dead ends: 1732 [2021-07-13 19:16:59,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-07-13 19:16:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-07-13 19:16:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.889655172413793) internal successors, (4609), 1595 states have internal predecessors, (4609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-07-13 19:16:59,181 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-07-13 19:16:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,181 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-07-13 19:16:59,181 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) [2021-07-13 19:16:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-07-13 19:16:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:59,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,183 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:59,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-07-13 19:16:59,383 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1597831246, now seen corresponding path program 128 times [2021-07-13 19:16:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:59,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356535989] [2021-07-13 19:16:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:59,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:59,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356535989] [2021-07-13 19:16:59,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356535989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024853337] [2021-07-13 19:16:59,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:16:59,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:59,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:59,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:16:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:59,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024853337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:59,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 19:16:59,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035459620] [2021-07-13 19:16:59,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:59,536 INFO L87 Difference]: Start difference. First operand 1596 states and 4609 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) [2021-07-13 19:16:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,788 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-07-13 19:16:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:16:59,789 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 19 [2021-07-13 19:16:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,791 INFO L225 Difference]: With dead ends: 1746 [2021-07-13 19:16:59,791 INFO L226 Difference]: Without dead ends: 1746 [2021-07-13 19:16:59,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:16:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-07-13 19:16:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-07-13 19:16:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.8771580345285526) internal successors, (4333), 1506 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-07-13 19:16:59,808 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-07-13 19:16:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,808 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-07-13 19:16:59,808 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) [2021-07-13 19:16:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-07-13 19:16:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:16:59,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,810 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:00,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,026 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash -114696308, now seen corresponding path program 129 times [2021-07-13 19:17:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:00,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073353470] [2021-07-13 19:17:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073353470] [2021-07-13 19:17:00,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073353470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725757667] [2021-07-13 19:17:00,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:00,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725757667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:00,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 19:17:00,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915825552] [2021-07-13 19:17:00,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:00,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:00,160 INFO L87 Difference]: Start difference. First operand 1507 states and 4333 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) [2021-07-13 19:17:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:00,426 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-07-13 19:17:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:17:00,426 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 19 [2021-07-13 19:17:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:00,429 INFO L225 Difference]: With dead ends: 1884 [2021-07-13 19:17:00,429 INFO L226 Difference]: Without dead ends: 1884 [2021-07-13 19:17:00,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:17:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-07-13 19:17:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-07-13 19:17:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8792987188132164) internal successors, (4270), 1483 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-07-13 19:17:00,447 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-07-13 19:17:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:00,447 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-07-13 19:17:00,447 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) [2021-07-13 19:17:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-07-13 19:17:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:00,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:00,449 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:00,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,662 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:00,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2004726350, now seen corresponding path program 130 times [2021-07-13 19:17:00,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:00,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126494676] [2021-07-13 19:17:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:00,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126494676] [2021-07-13 19:17:00,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126494676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43979345] [2021-07-13 19:17:00,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:00,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:00,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43979345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:00,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-07-13 19:17:00,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177856436] [2021-07-13 19:17:00,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:00,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:00,787 INFO L87 Difference]: Start difference. First operand 1484 states and 4270 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) [2021-07-13 19:17:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:00,938 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-07-13 19:17:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:00,939 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 19 [2021-07-13 19:17:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:00,941 INFO L225 Difference]: With dead ends: 1607 [2021-07-13 19:17:00,941 INFO L226 Difference]: Without dead ends: 1603 [2021-07-13 19:17:00,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-07-13 19:17:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-07-13 19:17:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8772757923128793) internal successors, (4267), 1483 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-07-13 19:17:00,958 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-07-13 19:17:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:00,958 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-07-13 19:17:00,958 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) [2021-07-13 19:17:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-07-13 19:17:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:00,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:00,960 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:01,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:01,173 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1629667698, now seen corresponding path program 131 times [2021-07-13 19:17:01,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:01,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870623893] [2021-07-13 19:17:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870623893] [2021-07-13 19:17:01,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870623893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424197841] [2021-07-13 19:17:01,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:01,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:01,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424197841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:01,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:17:01,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095513982] [2021-07-13 19:17:01,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:01,314 INFO L87 Difference]: Start difference. First operand 1484 states and 4267 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,552 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-07-13 19:17:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:17:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:01,555 INFO L225 Difference]: With dead ends: 1883 [2021-07-13 19:17:01,555 INFO L226 Difference]: Without dead ends: 1883 [2021-07-13 19:17:01,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:17:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-07-13 19:17:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-07-13 19:17:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 2.8966745843230406) internal successors, (4878), 1684 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-07-13 19:17:01,575 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-07-13 19:17:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:01,575 INFO L482 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-07-13 19:17:01,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-07-13 19:17:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:01,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:01,577 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:01,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-13 19:17:01,794 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:01,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1550714670, now seen corresponding path program 132 times [2021-07-13 19:17:01,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:01,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151404330] [2021-07-13 19:17:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151404330] [2021-07-13 19:17:01,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151404330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798494694] [2021-07-13 19:17:01,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:01,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:01,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:01,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798494694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:01,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-07-13 19:17:01,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192013068] [2021-07-13 19:17:01,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:01,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:01,936 INFO L87 Difference]: Start difference. First operand 1685 states and 4878 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:02,059 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-07-13 19:17:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:17:02,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:02,063 INFO L225 Difference]: With dead ends: 1804 [2021-07-13 19:17:02,063 INFO L226 Difference]: Without dead ends: 1802 [2021-07-13 19:17:02,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-07-13 19:17:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-07-13 19:17:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 2.8985849056603774) internal successors, (4916), 1696 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-07-13 19:17:02,082 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-07-13 19:17:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:02,082 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-07-13 19:17:02,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-07-13 19:17:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:02,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:02,085 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:02,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-13 19:17:02,301 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1026503566, now seen corresponding path program 133 times [2021-07-13 19:17:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:02,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941947936] [2021-07-13 19:17:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:02,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941947936] [2021-07-13 19:17:02,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941947936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904246971] [2021-07-13 19:17:02,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:02,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904246971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:02,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-07-13 19:17:02,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167718091] [2021-07-13 19:17:02,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:02,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:02,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:02,424 INFO L87 Difference]: Start difference. First operand 1697 states and 4916 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:02,534 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-07-13 19:17:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:02,537 INFO L225 Difference]: With dead ends: 1866 [2021-07-13 19:17:02,537 INFO L226 Difference]: Without dead ends: 1866 [2021-07-13 19:17:02,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-07-13 19:17:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-07-13 19:17:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.897466116676488) internal successors, (4917), 1697 states have internal predecessors, (4917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-07-13 19:17:02,556 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-07-13 19:17:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:02,557 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-07-13 19:17:02,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-07-13 19:17:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:02,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:02,559 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:02,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-13 19:17:02,759 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416396, now seen corresponding path program 134 times [2021-07-13 19:17:02,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:02,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596091958] [2021-07-13 19:17:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:02,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596091958] [2021-07-13 19:17:02,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596091958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561792636] [2021-07-13 19:17:02,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:02,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:02,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:02,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:02,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561792636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:02,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-07-13 19:17:02,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419336310] [2021-07-13 19:17:02,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:02,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:02,893 INFO L87 Difference]: Start difference. First operand 1698 states and 4917 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:03,048 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-07-13 19:17:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:03,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:03,050 INFO L225 Difference]: With dead ends: 1913 [2021-07-13 19:17:03,051 INFO L226 Difference]: Without dead ends: 1913 [2021-07-13 19:17:03,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:17:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-07-13 19:17:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-07-13 19:17:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.896409652736904) internal successors, (4921), 1699 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-07-13 19:17:03,072 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-07-13 19:17:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:03,072 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-07-13 19:17:03,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-07-13 19:17:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:03,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:03,074 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:03,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-13 19:17:03,289 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash -521443406, now seen corresponding path program 135 times [2021-07-13 19:17:03,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:03,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162980197] [2021-07-13 19:17:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:03,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:03,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162980197] [2021-07-13 19:17:03,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162980197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595870580] [2021-07-13 19:17:03,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:03,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:03,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:03,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595870580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:03,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-07-13 19:17:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110519345] [2021-07-13 19:17:03,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:03,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:03,416 INFO L87 Difference]: Start difference. First operand 1700 states and 4921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:03,625 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-07-13 19:17:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:17:03,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:03,628 INFO L225 Difference]: With dead ends: 2111 [2021-07-13 19:17:03,628 INFO L226 Difference]: Without dead ends: 2111 [2021-07-13 19:17:03,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:17:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-07-13 19:17:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-07-13 19:17:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 2.9123548046462515) internal successors, (5516), 1894 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-07-13 19:17:03,673 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-07-13 19:17:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:03,673 INFO L482 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-07-13 19:17:03,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-07-13 19:17:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:03,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:03,675 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:03,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:03,889 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:03,889 INFO L82 PathProgramCache]: Analyzing trace with hash 16412172, now seen corresponding path program 136 times [2021-07-13 19:17:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:03,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361130326] [2021-07-13 19:17:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:03,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:03,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361130326] [2021-07-13 19:17:03,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361130326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814151339] [2021-07-13 19:17:03,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:03,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:04,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814151339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:04,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-07-13 19:17:04,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345517569] [2021-07-13 19:17:04,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:04,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:04,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:04,032 INFO L87 Difference]: Start difference. First operand 1895 states and 5516 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:04,214 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-07-13 19:17:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:04,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:04,217 INFO L225 Difference]: With dead ends: 2071 [2021-07-13 19:17:04,217 INFO L226 Difference]: Without dead ends: 2071 [2021-07-13 19:17:04,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:17:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-13 19:17:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-07-13 19:17:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9082666666666666) internal successors, (5453), 1875 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-07-13 19:17:04,238 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-07-13 19:17:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:04,238 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-07-13 19:17:04,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-07-13 19:17:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:04,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:04,241 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:04,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-07-13 19:17:04,457 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash -489934094, now seen corresponding path program 137 times [2021-07-13 19:17:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:04,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276408339] [2021-07-13 19:17:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:04,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276408339] [2021-07-13 19:17:04,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276408339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320811301] [2021-07-13 19:17:04,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:04,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:04,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:04,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320811301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:04,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-07-13 19:17:04,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405860511] [2021-07-13 19:17:04,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:04,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:04,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:04,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:04,595 INFO L87 Difference]: Start difference. First operand 1876 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:04,767 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-07-13 19:17:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:17:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:04,770 INFO L225 Difference]: With dead ends: 2136 [2021-07-13 19:17:04,770 INFO L226 Difference]: Without dead ends: 2136 [2021-07-13 19:17:04,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:17:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-07-13 19:17:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-07-13 19:17:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.9188391539596656) internal successors, (5934), 2033 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-07-13 19:17:04,792 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-07-13 19:17:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:04,792 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-07-13 19:17:04,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-07-13 19:17:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:04,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:04,794 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:05,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-13 19:17:05,007 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:05,008 INFO L82 PathProgramCache]: Analyzing trace with hash 993200844, now seen corresponding path program 138 times [2021-07-13 19:17:05,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:05,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191219692] [2021-07-13 19:17:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:05,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:05,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191219692] [2021-07-13 19:17:05,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191219692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814848009] [2021-07-13 19:17:05,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:05,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:05,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:05,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814848009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:05,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:17:05,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180753025] [2021-07-13 19:17:05,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:05,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:05,155 INFO L87 Difference]: Start difference. First operand 2034 states and 5934 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) [2021-07-13 19:17:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:05,359 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-07-13 19:17:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:05,360 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 19 [2021-07-13 19:17:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:05,362 INFO L225 Difference]: With dead ends: 2171 [2021-07-13 19:17:05,362 INFO L226 Difference]: Without dead ends: 2171 [2021-07-13 19:17:05,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:17:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-07-13 19:17:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-07-13 19:17:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.9181055747409967) internal successors, (5915), 2027 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-07-13 19:17:05,385 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-07-13 19:17:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:05,385 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-07-13 19:17:05,385 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) [2021-07-13 19:17:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-07-13 19:17:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:17:05,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:05,387 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:05,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:05,601 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash -274256334, now seen corresponding path program 139 times [2021-07-13 19:17:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:05,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099669451] [2021-07-13 19:17:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:05,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099669451] [2021-07-13 19:17:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099669451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922712820] [2021-07-13 19:17:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:05,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922712820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:05,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:17:05,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580245753] [2021-07-13 19:17:05,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:17:05,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:05,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:17:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:05,785 INFO L87 Difference]: Start difference. First operand 2028 states and 5915 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) [2021-07-13 19:17:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,095 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-07-13 19:17:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:17:06,095 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 19 [2021-07-13 19:17:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,098 INFO L225 Difference]: With dead ends: 2447 [2021-07-13 19:17:06,098 INFO L226 Difference]: Without dead ends: 2447 [2021-07-13 19:17:06,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:17:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-13 19:17:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-07-13 19:17:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.920328343795268) internal successors, (6048), 2071 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-07-13 19:17:06,122 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-07-13 19:17:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,122 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-07-13 19:17:06,122 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) [2021-07-13 19:17:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-07-13 19:17:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:06,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,124 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:06,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:06,340 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash 935559555, now seen corresponding path program 140 times [2021-07-13 19:17:06,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:06,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834653450] [2021-07-13 19:17:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:06,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:06,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834653450] [2021-07-13 19:17:06,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834653450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531544762] [2021-07-13 19:17:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:06,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:06,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531544762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:06,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-13 19:17:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666532682] [2021-07-13 19:17:06,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:06,440 INFO L87 Difference]: Start difference. First operand 2072 states and 6048 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) [2021-07-13 19:17:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,556 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-07-13 19:17:06,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:06,556 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 [2021-07-13 19:17:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,559 INFO L225 Difference]: With dead ends: 2203 [2021-07-13 19:17:06,559 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 19:17:06,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:06,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 19:17:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-07-13 19:17:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.9192456479690523) internal successors, (6037), 2068 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-07-13 19:17:06,581 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-07-13 19:17:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,581 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-07-13 19:17:06,581 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) [2021-07-13 19:17:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-07-13 19:17:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:06,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,584 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:06,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:06,799 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash -221292409, now seen corresponding path program 141 times [2021-07-13 19:17:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263137938] [2021-07-13 19:17:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:06,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263137938] [2021-07-13 19:17:06,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263137938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464576786] [2021-07-13 19:17:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:06,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:17:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464576786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:06,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:06,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:06,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547698724] [2021-07-13 19:17:06,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:06,899 INFO L87 Difference]: Start difference. First operand 2069 states and 6037 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) [2021-07-13 19:17:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,960 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-07-13 19:17:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:06,960 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 20 [2021-07-13 19:17:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,963 INFO L225 Difference]: With dead ends: 2256 [2021-07-13 19:17:06,963 INFO L226 Difference]: Without dead ends: 2254 [2021-07-13 19:17:06,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-13 19:17:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-07-13 19:17:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.9181905678537055) internal successors, (6064), 2078 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-07-13 19:17:06,987 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-07-13 19:17:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,987 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-07-13 19:17:06,987 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) [2021-07-13 19:17:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-07-13 19:17:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:06,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,989 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:07,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-07-13 19:17:07,203 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1524162281, now seen corresponding path program 142 times [2021-07-13 19:17:07,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:07,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904779998] [2021-07-13 19:17:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:07,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:07,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904779998] [2021-07-13 19:17:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904779998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641717301] [2021-07-13 19:17:07,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:07,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:07,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:07,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:07,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641717301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:07,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:07,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552684846] [2021-07-13 19:17:07,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:07,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:07,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:07,302 INFO L87 Difference]: Start difference. First operand 2079 states and 6064 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) [2021-07-13 19:17:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:07,391 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-07-13 19:17:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:07,392 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 20 [2021-07-13 19:17:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:07,395 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 19:17:07,395 INFO L226 Difference]: Without dead ends: 2284 [2021-07-13 19:17:07,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-07-13 19:17:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-07-13 19:17:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.91405118300338) internal successors, (6035), 2071 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-07-13 19:17:07,419 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-07-13 19:17:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:07,419 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-07-13 19:17:07,419 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) [2021-07-13 19:17:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-07-13 19:17:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:07,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:07,421 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:07,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-07-13 19:17:07,638 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1060191707, now seen corresponding path program 143 times [2021-07-13 19:17:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:07,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170559804] [2021-07-13 19:17:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:07,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:07,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170559804] [2021-07-13 19:17:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170559804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264676013] [2021-07-13 19:17:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:07,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:07,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:07,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264676013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:07,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641789166] [2021-07-13 19:17:07,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:07,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:07,781 INFO L87 Difference]: Start difference. First operand 2072 states and 6035 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) [2021-07-13 19:17:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:07,899 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-07-13 19:17:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:07,899 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 [2021-07-13 19:17:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:07,902 INFO L225 Difference]: With dead ends: 2223 [2021-07-13 19:17:07,902 INFO L226 Difference]: Without dead ends: 2220 [2021-07-13 19:17:07,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-07-13 19:17:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-07-13 19:17:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9084302325581395) internal successors, (6003), 2064 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-07-13 19:17:07,926 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-07-13 19:17:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:07,926 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-07-13 19:17:07,926 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) [2021-07-13 19:17:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-07-13 19:17:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:07,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:07,929 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:08,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-13 19:17:08,145 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash 429213289, now seen corresponding path program 144 times [2021-07-13 19:17:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:08,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931319114] [2021-07-13 19:17:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:08,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931319114] [2021-07-13 19:17:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931319114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436101540] [2021-07-13 19:17:08,194 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 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 [2021-07-13 19:17:08,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:17:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:08,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436101540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:08,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424774094] [2021-07-13 19:17:08,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:08,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:08,249 INFO L87 Difference]: Start difference. First operand 2065 states and 6003 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) [2021-07-13 19:17:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:08,381 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-07-13 19:17:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:08,381 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 [2021-07-13 19:17:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:08,384 INFO L225 Difference]: With dead ends: 2220 [2021-07-13 19:17:08,384 INFO L226 Difference]: Without dead ends: 2216 [2021-07-13 19:17:08,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-07-13 19:17:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-07-13 19:17:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9040697674418605) internal successors, (5994), 2064 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-07-13 19:17:08,408 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-07-13 19:17:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:08,408 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-07-13 19:17:08,408 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) [2021-07-13 19:17:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-07-13 19:17:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:08,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:08,410 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:08,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-13 19:17:08,626 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash -643872091, now seen corresponding path program 145 times [2021-07-13 19:17:08,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:08,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573013859] [2021-07-13 19:17:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:08,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:08,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573013859] [2021-07-13 19:17:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573013859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683696083] [2021-07-13 19:17:08,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:08,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:08,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683696083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:08,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 19:17:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445602846] [2021-07-13 19:17:08,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:08,732 INFO L87 Difference]: Start difference. First operand 2065 states and 5994 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) [2021-07-13 19:17:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:08,834 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-07-13 19:17:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:08,835 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 20 [2021-07-13 19:17:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:08,837 INFO L225 Difference]: With dead ends: 2259 [2021-07-13 19:17:08,837 INFO L226 Difference]: Without dead ends: 2253 [2021-07-13 19:17:08,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-07-13 19:17:08,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-07-13 19:17:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.9016867469879517) internal successors, (6021), 2075 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-07-13 19:17:08,860 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-07-13 19:17:08,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:08,860 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-07-13 19:17:08,860 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) [2021-07-13 19:17:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-07-13 19:17:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:08,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:08,862 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:09,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-13 19:17:09,078 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1340924973, now seen corresponding path program 146 times [2021-07-13 19:17:09,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:09,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644615927] [2021-07-13 19:17:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:09,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644615927] [2021-07-13 19:17:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644615927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272099885] [2021-07-13 19:17:09,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:09,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:09,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272099885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:09,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 19:17:09,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669671077] [2021-07-13 19:17:09,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:09,186 INFO L87 Difference]: Start difference. First operand 2076 states and 6021 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) [2021-07-13 19:17:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:09,312 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-07-13 19:17:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:09,312 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 20 [2021-07-13 19:17:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:09,315 INFO L225 Difference]: With dead ends: 2223 [2021-07-13 19:17:09,315 INFO L226 Difference]: Without dead ends: 2214 [2021-07-13 19:17:09,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-07-13 19:17:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-07-13 19:17:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.9015996122152203) internal successors, (5986), 2063 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-07-13 19:17:09,337 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-07-13 19:17:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:09,337 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-07-13 19:17:09,337 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) [2021-07-13 19:17:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-07-13 19:17:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:09,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:09,339 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:09,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:09,555 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 564789647, now seen corresponding path program 147 times [2021-07-13 19:17:09,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:09,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339196718] [2021-07-13 19:17:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:09,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:09,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339196718] [2021-07-13 19:17:09,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339196718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299147658] [2021-07-13 19:17:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:09,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:09,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299147658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:09,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:09,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:09,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447199549] [2021-07-13 19:17:09,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:09,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:09,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:09,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:09,673 INFO L87 Difference]: Start difference. First operand 2064 states and 5986 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) [2021-07-13 19:17:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:09,726 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-07-13 19:17:09,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:09,726 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 20 [2021-07-13 19:17:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:09,729 INFO L225 Difference]: With dead ends: 2236 [2021-07-13 19:17:09,729 INFO L226 Difference]: Without dead ends: 2236 [2021-07-13 19:17:09,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-07-13 19:17:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-07-13 19:17:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9001937984496124) internal successors, (5986), 2064 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-07-13 19:17:09,752 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-07-13 19:17:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:09,752 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-07-13 19:17:09,753 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) [2021-07-13 19:17:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-07-13 19:17:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:09,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:09,755 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:09,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-13 19:17:09,970 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1984722959, now seen corresponding path program 148 times [2021-07-13 19:17:09,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:09,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258772006] [2021-07-13 19:17:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:10,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:10,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258772006] [2021-07-13 19:17:10,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258772006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895310271] [2021-07-13 19:17:10,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:10,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:10,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895310271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:10,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:10,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457700038] [2021-07-13 19:17:10,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:10,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:10,063 INFO L87 Difference]: Start difference. First operand 2065 states and 5986 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) [2021-07-13 19:17:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:10,137 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-07-13 19:17:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:10,137 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 20 [2021-07-13 19:17:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:10,140 INFO L225 Difference]: With dead ends: 2263 [2021-07-13 19:17:10,140 INFO L226 Difference]: Without dead ends: 2262 [2021-07-13 19:17:10,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-07-13 19:17:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-07-13 19:17:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.897001934235977) internal successors, (5991), 2068 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-07-13 19:17:10,164 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-07-13 19:17:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:10,164 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-07-13 19:17:10,164 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) [2021-07-13 19:17:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-07-13 19:17:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:10,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:10,166 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:10,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-07-13 19:17:10,382 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -274109651, now seen corresponding path program 149 times [2021-07-13 19:17:10,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:10,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925866986] [2021-07-13 19:17:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:10,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:10,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925866986] [2021-07-13 19:17:10,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925866986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049445943] [2021-07-13 19:17:10,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:10,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:10,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049445943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:10,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-07-13 19:17:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938841523] [2021-07-13 19:17:10,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:10,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:10,476 INFO L87 Difference]: Start difference. First operand 2069 states and 5991 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) [2021-07-13 19:17:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:10,589 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-07-13 19:17:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:10,590 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 20 [2021-07-13 19:17:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:10,592 INFO L225 Difference]: With dead ends: 2229 [2021-07-13 19:17:10,592 INFO L226 Difference]: Without dead ends: 2225 [2021-07-13 19:17:10,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-07-13 19:17:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-07-13 19:17:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.8913784705309302) internal successors, (5936), 2053 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-07-13 19:17:10,616 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-07-13 19:17:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:10,616 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-07-13 19:17:10,616 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) [2021-07-13 19:17:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-07-13 19:17:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:10,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:10,618 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:10,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:10,832 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1215295345, now seen corresponding path program 150 times [2021-07-13 19:17:10,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:10,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282000845] [2021-07-13 19:17:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:10,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:10,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282000845] [2021-07-13 19:17:10,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282000845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987792240] [2021-07-13 19:17:10,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:10,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:10,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:10,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:10,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987792240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:10,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:17:10,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903878988] [2021-07-13 19:17:10,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:10,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:10,937 INFO L87 Difference]: Start difference. First operand 2054 states and 5936 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) [2021-07-13 19:17:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:11,061 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-07-13 19:17:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:11,061 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 [2021-07-13 19:17:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:11,064 INFO L225 Difference]: With dead ends: 2217 [2021-07-13 19:17:11,064 INFO L226 Difference]: Without dead ends: 2211 [2021-07-13 19:17:11,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-07-13 19:17:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-07-13 19:17:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.8880195599022005) internal successors, (5906), 2045 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-07-13 19:17:11,088 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-07-13 19:17:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:11,089 INFO L482 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-07-13 19:17:11,089 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) [2021-07-13 19:17:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-07-13 19:17:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:11,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:11,091 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:11,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:11,291 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:11,292 INFO L82 PathProgramCache]: Analyzing trace with hash 142209965, now seen corresponding path program 151 times [2021-07-13 19:17:11,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:11,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339487848] [2021-07-13 19:17:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:11,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:11,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339487848] [2021-07-13 19:17:11,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339487848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783147537] [2021-07-13 19:17:11,346 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 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 [2021-07-13 19:17:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:11,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783147537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:11,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:17:11,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145086271] [2021-07-13 19:17:11,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:11,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:11,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:11,405 INFO L87 Difference]: Start difference. First operand 2046 states and 5906 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) [2021-07-13 19:17:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:11,556 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-07-13 19:17:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:11,556 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 20 [2021-07-13 19:17:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:11,559 INFO L225 Difference]: With dead ends: 2213 [2021-07-13 19:17:11,559 INFO L226 Difference]: Without dead ends: 2207 [2021-07-13 19:17:11,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-13 19:17:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-07-13 19:17:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.8836754643206257) internal successors, (5900), 2046 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-07-13 19:17:11,583 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-07-13 19:17:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:11,584 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-07-13 19:17:11,584 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) [2021-07-13 19:17:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-07-13 19:17:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:11,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:11,586 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:11,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:11,794 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1236301553, now seen corresponding path program 152 times [2021-07-13 19:17:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:11,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29000173] [2021-07-13 19:17:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:11,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:11,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29000173] [2021-07-13 19:17:11,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29000173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015834908] [2021-07-13 19:17:11,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:11,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:11,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:11,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:11,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015834908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:11,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:17:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943347157] [2021-07-13 19:17:11,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:11,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:11,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:11,928 INFO L87 Difference]: Start difference. First operand 2047 states and 5900 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) [2021-07-13 19:17:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:12,075 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-07-13 19:17:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:12,075 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 20 [2021-07-13 19:17:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:12,078 INFO L225 Difference]: With dead ends: 2421 [2021-07-13 19:17:12,078 INFO L226 Difference]: Without dead ends: 2413 [2021-07-13 19:17:12,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-07-13 19:17:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-07-13 19:17:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.884301488238118) internal successors, (6008), 2083 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-07-13 19:17:12,103 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-07-13 19:17:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:12,103 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-07-13 19:17:12,103 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) [2021-07-13 19:17:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-07-13 19:17:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:12,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:12,105 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:12,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:12,318 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1102498691, now seen corresponding path program 153 times [2021-07-13 19:17:12,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:12,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594574487] [2021-07-13 19:17:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:12,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:12,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594574487] [2021-07-13 19:17:12,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594574487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157711436] [2021-07-13 19:17:12,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:12,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:12,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:12,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157711436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:12,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:17:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164527029] [2021-07-13 19:17:12,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:12,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:12,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:12,430 INFO L87 Difference]: Start difference. First operand 2084 states and 6008 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) [2021-07-13 19:17:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:12,564 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-07-13 19:17:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:12,564 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 [2021-07-13 19:17:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:12,567 INFO L225 Difference]: With dead ends: 2248 [2021-07-13 19:17:12,567 INFO L226 Difference]: Without dead ends: 2240 [2021-07-13 19:17:12,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-07-13 19:17:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-07-13 19:17:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.8816169393647737) internal successors, (5988), 2078 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-07-13 19:17:12,590 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-07-13 19:17:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:12,590 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-07-13 19:17:12,590 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) [2021-07-13 19:17:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-07-13 19:17:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:12,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:12,592 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:12,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-07-13 19:17:12,808 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -836470393, now seen corresponding path program 154 times [2021-07-13 19:17:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581474358] [2021-07-13 19:17:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:12,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:12,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581474358] [2021-07-13 19:17:12,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581474358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053521152] [2021-07-13 19:17:12,849 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 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 [2021-07-13 19:17:12,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:12,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053521152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:12,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:12,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248122109] [2021-07-13 19:17:12,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:12,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:12,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:12,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:12,913 INFO L87 Difference]: Start difference. First operand 2079 states and 5988 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) [2021-07-13 19:17:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:12,963 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-07-13 19:17:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:12,963 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 20 [2021-07-13 19:17:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:12,966 INFO L225 Difference]: With dead ends: 2261 [2021-07-13 19:17:12,966 INFO L226 Difference]: Without dead ends: 2259 [2021-07-13 19:17:12,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-07-13 19:17:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-07-13 19:17:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.880424300867888) internal successors, (5974), 2074 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-07-13 19:17:12,990 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-07-13 19:17:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:12,990 INFO L482 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-07-13 19:17:12,990 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) [2021-07-13 19:17:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-07-13 19:17:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:12,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:12,992 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:13,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:13,195 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:13,195 INFO L82 PathProgramCache]: Analyzing trace with hash 908984297, now seen corresponding path program 155 times [2021-07-13 19:17:13,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:13,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944999291] [2021-07-13 19:17:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:13,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:13,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944999291] [2021-07-13 19:17:13,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944999291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:13,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055709007] [2021-07-13 19:17:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:13,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:13,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:13,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055709007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:13,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:13,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929215534] [2021-07-13 19:17:13,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:13,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:13,314 INFO L87 Difference]: Start difference. First operand 2075 states and 5974 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) [2021-07-13 19:17:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:13,386 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-07-13 19:17:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:13,386 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 20 [2021-07-13 19:17:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:13,389 INFO L225 Difference]: With dead ends: 2242 [2021-07-13 19:17:13,389 INFO L226 Difference]: Without dead ends: 2242 [2021-07-13 19:17:13,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-07-13 19:17:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-07-13 19:17:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.874515503875969) internal successors, (5933), 2064 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-07-13 19:17:13,415 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-07-13 19:17:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:13,415 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-07-13 19:17:13,416 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) [2021-07-13 19:17:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-07-13 19:17:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:13,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:13,418 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:13,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-13 19:17:13,621 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:13,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1675369691, now seen corresponding path program 156 times [2021-07-13 19:17:13,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:13,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902521358] [2021-07-13 19:17:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:13,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902521358] [2021-07-13 19:17:13,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902521358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643721991] [2021-07-13 19:17:13,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:13,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:13,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643721991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:13,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:13,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:13,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437119786] [2021-07-13 19:17:13,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:13,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:13,727 INFO L87 Difference]: Start difference. First operand 2065 states and 5933 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) [2021-07-13 19:17:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:13,836 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-07-13 19:17:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:13,836 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 [2021-07-13 19:17:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:13,839 INFO L225 Difference]: With dead ends: 2234 [2021-07-13 19:17:13,839 INFO L226 Difference]: Without dead ends: 2231 [2021-07-13 19:17:13,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-07-13 19:17:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-07-13 19:17:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8690360272638755) internal successors, (5893), 2054 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-07-13 19:17:13,864 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-07-13 19:17:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:13,864 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-07-13 19:17:13,864 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) [2021-07-13 19:17:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-07-13 19:17:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:13,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:13,866 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:14,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-13 19:17:14,083 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash -185964695, now seen corresponding path program 157 times [2021-07-13 19:17:14,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:14,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826594568] [2021-07-13 19:17:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:14,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826594568] [2021-07-13 19:17:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826594568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941294978] [2021-07-13 19:17:14,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:14,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941294978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:14,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 19:17:14,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826359716] [2021-07-13 19:17:14,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:14,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:14,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:14,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:14,188 INFO L87 Difference]: Start difference. First operand 2055 states and 5893 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) [2021-07-13 19:17:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:14,307 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-07-13 19:17:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:14,308 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 20 [2021-07-13 19:17:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:14,310 INFO L225 Difference]: With dead ends: 2228 [2021-07-13 19:17:14,310 INFO L226 Difference]: Without dead ends: 2224 [2021-07-13 19:17:14,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-07-13 19:17:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-07-13 19:17:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.862706913339825) internal successors, (5880), 2054 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-07-13 19:17:14,334 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-07-13 19:17:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:14,334 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-07-13 19:17:14,334 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) [2021-07-13 19:17:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-07-13 19:17:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:14,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:14,336 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:14,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-13 19:17:14,552 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1259050075, now seen corresponding path program 158 times [2021-07-13 19:17:14,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:14,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370250319] [2021-07-13 19:17:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:14,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:14,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370250319] [2021-07-13 19:17:14,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370250319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187571047] [2021-07-13 19:17:14,605 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 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 [2021-07-13 19:17:14,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:14,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187571047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:14,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:14,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 19:17:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424032618] [2021-07-13 19:17:14,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:14,673 INFO L87 Difference]: Start difference. First operand 2055 states and 5880 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) [2021-07-13 19:17:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:14,782 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-07-13 19:17:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:14,783 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 20 [2021-07-13 19:17:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:14,786 INFO L225 Difference]: With dead ends: 2691 [2021-07-13 19:17:14,786 INFO L226 Difference]: Without dead ends: 2685 [2021-07-13 19:17:14,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-07-13 19:17:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-07-13 19:17:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8612463485881205) internal successors, (5877), 2054 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-07-13 19:17:14,811 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-07-13 19:17:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:14,812 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-07-13 19:17:14,812 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) [2021-07-13 19:17:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-07-13 19:17:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:14,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:14,814 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:15,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:15,030 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash -164958487, now seen corresponding path program 159 times [2021-07-13 19:17:15,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:15,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852832657] [2021-07-13 19:17:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:15,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:15,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852832657] [2021-07-13 19:17:15,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852832657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698929294] [2021-07-13 19:17:15,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:15,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:15,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:15,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698929294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:17:15,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456307357] [2021-07-13 19:17:15,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:15,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:15,142 INFO L87 Difference]: Start difference. First operand 2055 states and 5877 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) [2021-07-13 19:17:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:15,265 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-07-13 19:17:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:15,265 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 [2021-07-13 19:17:15,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:15,268 INFO L225 Difference]: With dead ends: 2703 [2021-07-13 19:17:15,269 INFO L226 Difference]: Without dead ends: 2695 [2021-07-13 19:17:15,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-07-13 19:17:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-07-13 19:17:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.862403100775194) internal successors, (5908), 2064 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-07-13 19:17:15,323 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-07-13 19:17:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:15,323 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-07-13 19:17:15,323 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) [2021-07-13 19:17:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-07-13 19:17:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:15,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:15,325 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:15,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-13 19:17:15,538 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:15,538 INFO L82 PathProgramCache]: Analyzing trace with hash -607857627, now seen corresponding path program 160 times [2021-07-13 19:17:15,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:15,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483037060] [2021-07-13 19:17:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:15,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:15,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483037060] [2021-07-13 19:17:15,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483037060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771045404] [2021-07-13 19:17:15,599 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 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 [2021-07-13 19:17:15,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:15,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771045404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:15,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 19:17:15,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469807946] [2021-07-13 19:17:15,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:15,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:15,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:15,663 INFO L87 Difference]: Start difference. First operand 2065 states and 5908 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) [2021-07-13 19:17:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:15,803 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-07-13 19:17:15,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:15,803 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 20 [2021-07-13 19:17:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:15,807 INFO L225 Difference]: With dead ends: 2452 [2021-07-13 19:17:15,807 INFO L226 Difference]: Without dead ends: 2442 [2021-07-13 19:17:15,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-07-13 19:17:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-07-13 19:17:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.8614341085271318) internal successors, (5906), 2064 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-07-13 19:17:15,833 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-07-13 19:17:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:15,833 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-07-13 19:17:15,833 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) [2021-07-13 19:17:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-07-13 19:17:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:15,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:15,836 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:16,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:16,052 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:16,052 INFO L82 PathProgramCache]: Analyzing trace with hash 130741455, now seen corresponding path program 161 times [2021-07-13 19:17:16,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:16,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273805608] [2021-07-13 19:17:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:16,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273805608] [2021-07-13 19:17:16,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273805608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473957994] [2021-07-13 19:17:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:16,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473957994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:16,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-13 19:17:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68795274] [2021-07-13 19:17:16,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:16,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:16,201 INFO L87 Difference]: Start difference. First operand 2065 states and 5906 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:17:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:16,313 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-07-13 19:17:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:16,316 INFO L225 Difference]: With dead ends: 2203 [2021-07-13 19:17:16,316 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 19:17:16,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 19:17:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-07-13 19:17:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8507684680218146) internal successors, (5750), 2017 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-07-13 19:17:16,339 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-07-13 19:17:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:16,339 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-07-13 19:17:16,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:17:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-07-13 19:17:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:16,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:16,341 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:16,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:16,557 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1438631789, now seen corresponding path program 162 times [2021-07-13 19:17:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:16,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768053490] [2021-07-13 19:17:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:16,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:16,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768053490] [2021-07-13 19:17:16,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768053490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006780111] [2021-07-13 19:17:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:16,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:16,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006780111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:16,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:16,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160977356] [2021-07-13 19:17:16,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:16,663 INFO L87 Difference]: Start difference. First operand 2018 states and 5750 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) [2021-07-13 19:17:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:16,776 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-07-13 19:17:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:16,776 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 [2021-07-13 19:17:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:16,779 INFO L225 Difference]: With dead ends: 2240 [2021-07-13 19:17:16,779 INFO L226 Difference]: Without dead ends: 2231 [2021-07-13 19:17:16,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-07-13 19:17:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-07-13 19:17:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.846268656716418) internal successors, (5721), 2010 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-07-13 19:17:16,802 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-07-13 19:17:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:16,802 INFO L482 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-07-13 19:17:16,802 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) [2021-07-13 19:17:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-07-13 19:17:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:16,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:16,804 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:17,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-07-13 19:17:17,020 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1762243919, now seen corresponding path program 163 times [2021-07-13 19:17:17,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:17,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909540888] [2021-07-13 19:17:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:17,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:17,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909540888] [2021-07-13 19:17:17,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909540888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676306768] [2021-07-13 19:17:17,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:17,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676306768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:17,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 19:17:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747649566] [2021-07-13 19:17:17,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:17,131 INFO L87 Difference]: Start difference. First operand 2011 states and 5721 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) [2021-07-13 19:17:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:17,274 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-07-13 19:17:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:17,274 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 20 [2021-07-13 19:17:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:17,276 INFO L225 Difference]: With dead ends: 2239 [2021-07-13 19:17:17,277 INFO L226 Difference]: Without dead ends: 2231 [2021-07-13 19:17:17,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-07-13 19:17:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-07-13 19:17:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.842313395946614) internal successors, (5750), 2023 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-07-13 19:17:17,300 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-07-13 19:17:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:17,300 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-07-13 19:17:17,300 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) [2021-07-13 19:17:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-07-13 19:17:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:17,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:17,302 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:17,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:17,518 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2089824237, now seen corresponding path program 164 times [2021-07-13 19:17:17,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:17,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609104198] [2021-07-13 19:17:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:17,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609104198] [2021-07-13 19:17:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609104198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458121522] [2021-07-13 19:17:17,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:17,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:17,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458121522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:17,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:17,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 19:17:17,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281952964] [2021-07-13 19:17:17,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:17,634 INFO L87 Difference]: Start difference. First operand 2024 states and 5750 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) [2021-07-13 19:17:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:17,777 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-07-13 19:17:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:17,777 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 20 [2021-07-13 19:17:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:17,780 INFO L225 Difference]: With dead ends: 2477 [2021-07-13 19:17:17,780 INFO L226 Difference]: Without dead ends: 2467 [2021-07-13 19:17:17,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-07-13 19:17:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-07-13 19:17:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.840394088669951) internal successors, (5766), 2030 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-07-13 19:17:17,804 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-07-13 19:17:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:17,804 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-07-13 19:17:17,804 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) [2021-07-13 19:17:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-07-13 19:17:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:17,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:17,806 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:18,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:18,023 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1135579185, now seen corresponding path program 165 times [2021-07-13 19:17:18,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:18,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102893452] [2021-07-13 19:17:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:18,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102893452] [2021-07-13 19:17:18,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102893452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825674495] [2021-07-13 19:17:18,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:18,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:18,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825674495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:18,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:18,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338666133] [2021-07-13 19:17:18,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:18,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:18,125 INFO L87 Difference]: Start difference. First operand 2031 states and 5766 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) [2021-07-13 19:17:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:18,198 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-07-13 19:17:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:17:18,199 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 20 [2021-07-13 19:17:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:18,201 INFO L225 Difference]: With dead ends: 2228 [2021-07-13 19:17:18,201 INFO L226 Difference]: Without dead ends: 2228 [2021-07-13 19:17:18,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-07-13 19:17:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-07-13 19:17:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.837140019860973) internal successors, (5714), 2014 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-07-13 19:17:18,224 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-07-13 19:17:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:18,225 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-07-13 19:17:18,225 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) [2021-07-13 19:17:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-07-13 19:17:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:18,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:18,227 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:18,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:18,429 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash -460779053, now seen corresponding path program 166 times [2021-07-13 19:17:18,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:18,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569739546] [2021-07-13 19:17:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:18,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569739546] [2021-07-13 19:17:18,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569739546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729816018] [2021-07-13 19:17:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:18,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:18,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:18,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:18,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729816018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:18,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:17:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417924329] [2021-07-13 19:17:18,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:18,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:18,561 INFO L87 Difference]: Start difference. First operand 2015 states and 5714 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) [2021-07-13 19:17:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:18,700 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-07-13 19:17:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:18,701 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 20 [2021-07-13 19:17:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:18,704 INFO L225 Difference]: With dead ends: 2228 [2021-07-13 19:17:18,704 INFO L226 Difference]: Without dead ends: 2218 [2021-07-13 19:17:18,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-07-13 19:17:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-07-13 19:17:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.8322548531607765) internal successors, (5690), 2009 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-07-13 19:17:18,730 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-07-13 19:17:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:18,730 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-07-13 19:17:18,730 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) [2021-07-13 19:17:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-07-13 19:17:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:18,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:18,733 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:18,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:18,949 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1325858673, now seen corresponding path program 167 times [2021-07-13 19:17:18,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:18,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365340244] [2021-07-13 19:17:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:18,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:18,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365340244] [2021-07-13 19:17:18,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365340244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:18,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685033209] [2021-07-13 19:17:18,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:19,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:19,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685033209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-07-13 19:17:19,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848595707] [2021-07-13 19:17:19,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:19,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:19,041 INFO L87 Difference]: Start difference. First operand 2010 states and 5690 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:19,096 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-07-13 19:17:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:19,100 INFO L225 Difference]: With dead ends: 2251 [2021-07-13 19:17:19,100 INFO L226 Difference]: Without dead ends: 2251 [2021-07-13 19:17:19,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-07-13 19:17:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-07-13 19:17:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8348214285714284) internal successors, (5715), 2016 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-07-13 19:17:19,143 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-07-13 19:17:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:19,143 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-07-13 19:17:19,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-07-13 19:17:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:19,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:19,145 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:19,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:19,361 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:19,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:19,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2130209325, now seen corresponding path program 168 times [2021-07-13 19:17:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:19,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561888038] [2021-07-13 19:17:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:19,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561888038] [2021-07-13 19:17:19,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561888038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937787852] [2021-07-13 19:17:19,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:19,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:17:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:19,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937787852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:19,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890350291] [2021-07-13 19:17:19,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:19,455 INFO L87 Difference]: Start difference. First operand 2017 states and 5715 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) [2021-07-13 19:17:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:19,558 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-07-13 19:17:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:19,558 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 [2021-07-13 19:17:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:19,561 INFO L225 Difference]: With dead ends: 2206 [2021-07-13 19:17:19,561 INFO L226 Difference]: Without dead ends: 2204 [2021-07-13 19:17:19,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-07-13 19:17:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-07-13 19:17:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.831845238095238) internal successors, (5709), 2016 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-07-13 19:17:19,586 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-07-13 19:17:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:19,586 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-07-13 19:17:19,586 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) [2021-07-13 19:17:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-07-13 19:17:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:19,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:19,588 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:19,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:19,804 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -675352975, now seen corresponding path program 169 times [2021-07-13 19:17:19,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:19,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425167638] [2021-07-13 19:17:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:19,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425167638] [2021-07-13 19:17:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425167638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362242311] [2021-07-13 19:17:19,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:19,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362242311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:19,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:19,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-07-13 19:17:19,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022956509] [2021-07-13 19:17:19,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:19,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:19,908 INFO L87 Difference]: Start difference. First operand 2017 states and 5709 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) [2021-07-13 19:17:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:20,038 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-07-13 19:17:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:20,038 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 20 [2021-07-13 19:17:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:20,041 INFO L225 Difference]: With dead ends: 2212 [2021-07-13 19:17:20,042 INFO L226 Difference]: Without dead ends: 2208 [2021-07-13 19:17:20,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-07-13 19:17:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-07-13 19:17:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.825892857142857) internal successors, (5697), 2016 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-07-13 19:17:20,068 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-07-13 19:17:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:20,068 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-07-13 19:17:20,068 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) [2021-07-13 19:17:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-07-13 19:17:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:20,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:20,070 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:20,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-13 19:17:20,285 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:20,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438355, now seen corresponding path program 170 times [2021-07-13 19:17:20,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:20,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68418873] [2021-07-13 19:17:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:20,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68418873] [2021-07-13 19:17:20,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68418873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913823812] [2021-07-13 19:17:20,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:20,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:20,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:20,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913823812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:20,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:17:20,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461243536] [2021-07-13 19:17:20,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:20,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:20,417 INFO L87 Difference]: Start difference. First operand 2017 states and 5697 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) [2021-07-13 19:17:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:20,549 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-07-13 19:17:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:20,550 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 20 [2021-07-13 19:17:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:20,552 INFO L225 Difference]: With dead ends: 2220 [2021-07-13 19:17:20,552 INFO L226 Difference]: Without dead ends: 2214 [2021-07-13 19:17:20,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-07-13 19:17:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-07-13 19:17:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8179563492063493) internal successors, (5681), 2016 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-07-13 19:17:20,576 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-07-13 19:17:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:20,576 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-07-13 19:17:20,576 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) [2021-07-13 19:17:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-07-13 19:17:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:20,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:20,578 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:20,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:20,794 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash -654346767, now seen corresponding path program 171 times [2021-07-13 19:17:20,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:20,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533893058] [2021-07-13 19:17:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:20,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533893058] [2021-07-13 19:17:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533893058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390782234] [2021-07-13 19:17:20,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:20,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:20,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:20,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390782234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:20,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:20,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:17:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736961312] [2021-07-13 19:17:20,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:20,909 INFO L87 Difference]: Start difference. First operand 2017 states and 5681 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) [2021-07-13 19:17:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:21,044 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-07-13 19:17:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:21,045 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 [2021-07-13 19:17:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:21,048 INFO L225 Difference]: With dead ends: 2831 [2021-07-13 19:17:21,048 INFO L226 Difference]: Without dead ends: 2823 [2021-07-13 19:17:21,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-07-13 19:17:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-07-13 19:17:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.8147420147420146) internal successors, (5728), 2035 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-07-13 19:17:21,101 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-07-13 19:17:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:21,101 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-07-13 19:17:21,101 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) [2021-07-13 19:17:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-07-13 19:17:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:21,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:21,104 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:21,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-07-13 19:17:21,319 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1097245907, now seen corresponding path program 172 times [2021-07-13 19:17:21,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:21,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458525838] [2021-07-13 19:17:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:21,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:21,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458525838] [2021-07-13 19:17:21,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458525838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837728770] [2021-07-13 19:17:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:21,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:21,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:21,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:21,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837728770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:21,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:17:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777799421] [2021-07-13 19:17:21,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:21,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:21,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:21,441 INFO L87 Difference]: Start difference. First operand 2036 states and 5728 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) [2021-07-13 19:17:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:21,587 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-07-13 19:17:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:21,587 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 20 [2021-07-13 19:17:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:21,591 INFO L225 Difference]: With dead ends: 2850 [2021-07-13 19:17:21,591 INFO L226 Difference]: Without dead ends: 2840 [2021-07-13 19:17:21,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-07-13 19:17:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-07-13 19:17:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.8118908382066277) internal successors, (5770), 2052 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-07-13 19:17:21,617 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-07-13 19:17:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:21,617 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-07-13 19:17:21,617 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) [2021-07-13 19:17:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-07-13 19:17:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:21,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:21,620 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:21,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:21,836 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1942217359, now seen corresponding path program 173 times [2021-07-13 19:17:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176551389] [2021-07-13 19:17:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:21,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:21,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176551389] [2021-07-13 19:17:21,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176551389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674680063] [2021-07-13 19:17:21,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:21,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:21,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:21,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:21,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674680063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:21,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:21,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:17:21,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226554454] [2021-07-13 19:17:21,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:21,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:21,960 INFO L87 Difference]: Start difference. First operand 2053 states and 5770 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) [2021-07-13 19:17:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:22,146 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-07-13 19:17:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:22,147 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 20 [2021-07-13 19:17:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,150 INFO L225 Difference]: With dead ends: 2624 [2021-07-13 19:17:22,150 INFO L226 Difference]: Without dead ends: 2612 [2021-07-13 19:17:22,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:17:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-07-13 19:17:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-07-13 19:17:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.809152872444012) internal successors, (5770), 2054 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-07-13 19:17:22,175 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-07-13 19:17:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:22,175 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-07-13 19:17:22,175 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) [2021-07-13 19:17:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-07-13 19:17:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:22,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:22,178 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:22,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,393 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2140466681, now seen corresponding path program 174 times [2021-07-13 19:17:22,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:22,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481903119] [2021-07-13 19:17:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:22,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481903119] [2021-07-13 19:17:22,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481903119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081837752] [2021-07-13 19:17:22,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:22,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:22,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081837752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:22,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:17:22,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463437919] [2021-07-13 19:17:22,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:22,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:22,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:22,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:22,520 INFO L87 Difference]: Start difference. First operand 2055 states and 5770 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) [2021-07-13 19:17:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:22,635 INFO L93 Difference]: Finished difference Result 2268 states and 6139 transitions. [2021-07-13 19:17:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:22,636 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 20 [2021-07-13 19:17:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,638 INFO L225 Difference]: With dead ends: 2268 [2021-07-13 19:17:22,638 INFO L226 Difference]: Without dead ends: 2264 [2021-07-13 19:17:22,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-13 19:17:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2086. [2021-07-13 19:17:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.8134292565947243) internal successors, (5866), 2085 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5866 transitions. [2021-07-13 19:17:22,662 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5866 transitions. Word has length 20 [2021-07-13 19:17:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:22,662 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5866 transitions. [2021-07-13 19:17:22,662 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) [2021-07-13 19:17:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5866 transitions. [2021-07-13 19:17:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:22,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:22,664 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:22,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-07-13 19:17:22,880 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1369412393, now seen corresponding path program 175 times [2021-07-13 19:17:22,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:22,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798204986] [2021-07-13 19:17:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:22,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798204986] [2021-07-13 19:17:22,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798204986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582860858] [2021-07-13 19:17:22,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:22,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:23,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582860858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:23,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-07-13 19:17:23,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017194157] [2021-07-13 19:17:23,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:23,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:23,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:23,023 INFO L87 Difference]: Start difference. First operand 2086 states and 5866 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-07-13 19:17:23,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:23,148 INFO L93 Difference]: Finished difference Result 2348 states and 6353 transitions. [2021-07-13 19:17:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:23,151 INFO L225 Difference]: With dead ends: 2348 [2021-07-13 19:17:23,151 INFO L226 Difference]: Without dead ends: 2340 [2021-07-13 19:17:23,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:23,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-07-13 19:17:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2086. [2021-07-13 19:17:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.809592326139089) internal successors, (5858), 2085 states have internal predecessors, (5858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5858 transitions. [2021-07-13 19:17:23,175 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5858 transitions. Word has length 20 [2021-07-13 19:17:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:23,175 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5858 transitions. [2021-07-13 19:17:23,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-07-13 19:17:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5858 transitions. [2021-07-13 19:17:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:23,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:23,177 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:23,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:23,393 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash 926513253, now seen corresponding path program 176 times [2021-07-13 19:17:23,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:23,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290851557] [2021-07-13 19:17:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290851557] [2021-07-13 19:17:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290851557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823271072] [2021-07-13 19:17:23,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:23,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:23,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:23,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823271072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:23,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-07-13 19:17:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001926562] [2021-07-13 19:17:23,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:23,521 INFO L87 Difference]: Start difference. First operand 2086 states and 5858 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-07-13 19:17:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:23,664 INFO L93 Difference]: Finished difference Result 2366 states and 6371 transitions. [2021-07-13 19:17:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:23,667 INFO L225 Difference]: With dead ends: 2366 [2021-07-13 19:17:23,667 INFO L226 Difference]: Without dead ends: 2356 [2021-07-13 19:17:23,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-07-13 19:17:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2100. [2021-07-13 19:17:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.8075273939971415) internal successors, (5893), 2099 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5893 transitions. [2021-07-13 19:17:23,692 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5893 transitions. Word has length 20 [2021-07-13 19:17:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:23,693 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5893 transitions. [2021-07-13 19:17:23,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-07-13 19:17:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5893 transitions. [2021-07-13 19:17:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:23,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:23,695 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:23,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:23,910 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash 81541801, now seen corresponding path program 177 times [2021-07-13 19:17:23,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:23,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232455639] [2021-07-13 19:17:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232455639] [2021-07-13 19:17:23,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232455639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418523319] [2021-07-13 19:17:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:24,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418523319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:24,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 19:17:24,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601564840] [2021-07-13 19:17:24,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:24,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:24,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:24,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:24,046 INFO L87 Difference]: Start difference. First operand 2100 states and 5893 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:24,224 INFO L93 Difference]: Finished difference Result 2617 states and 7055 transitions. [2021-07-13 19:17:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:24,228 INFO L225 Difference]: With dead ends: 2617 [2021-07-13 19:17:24,228 INFO L226 Difference]: Without dead ends: 2605 [2021-07-13 19:17:24,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:17:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-07-13 19:17:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2100. [2021-07-13 19:17:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.806574559313959) internal successors, (5891), 2099 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5891 transitions. [2021-07-13 19:17:24,254 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5891 transitions. Word has length 20 [2021-07-13 19:17:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:24,254 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5891 transitions. [2021-07-13 19:17:24,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5891 transitions. [2021-07-13 19:17:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:24,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:24,257 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:24,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:24,472 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1400047683, now seen corresponding path program 178 times [2021-07-13 19:17:24,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:24,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917326538] [2021-07-13 19:17:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:24,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917326538] [2021-07-13 19:17:24,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917326538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319239933] [2021-07-13 19:17:24,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:24,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:24,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319239933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:24,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-07-13 19:17:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327592115] [2021-07-13 19:17:24,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:24,601 INFO L87 Difference]: Start difference. First operand 2100 states and 5891 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:24,697 INFO L93 Difference]: Finished difference Result 2417 states and 6519 transitions. [2021-07-13 19:17:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:24,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:24,700 INFO L225 Difference]: With dead ends: 2417 [2021-07-13 19:17:24,700 INFO L226 Difference]: Without dead ends: 2417 [2021-07-13 19:17:24,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-07-13 19:17:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2170. [2021-07-13 19:17:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.827109266943292) internal successors, (6132), 2169 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6132 transitions. [2021-07-13 19:17:24,745 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6132 transitions. Word has length 20 [2021-07-13 19:17:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:24,745 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6132 transitions. [2021-07-13 19:17:24,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6132 transitions. [2021-07-13 19:17:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:24,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:24,748 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:24,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-07-13 19:17:24,963 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1677748861, now seen corresponding path program 179 times [2021-07-13 19:17:24,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:24,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284230821] [2021-07-13 19:17:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:25,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284230821] [2021-07-13 19:17:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284230821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529274492] [2021-07-13 19:17:25,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:25,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:17:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:25,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529274492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:25,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-07-13 19:17:25,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055540543] [2021-07-13 19:17:25,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:25,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:25,103 INFO L87 Difference]: Start difference. First operand 2170 states and 6132 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) [2021-07-13 19:17:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:25,261 INFO L93 Difference]: Finished difference Result 2716 states and 7385 transitions. [2021-07-13 19:17:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:25,261 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 20 [2021-07-13 19:17:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:25,265 INFO L225 Difference]: With dead ends: 2716 [2021-07-13 19:17:25,265 INFO L226 Difference]: Without dead ends: 2704 [2021-07-13 19:17:25,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:17:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-07-13 19:17:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2170. [2021-07-13 19:17:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.8261871830336562) internal successors, (6130), 2169 states have internal predecessors, (6130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6130 transitions. [2021-07-13 19:17:25,291 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6130 transitions. Word has length 20 [2021-07-13 19:17:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:25,291 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6130 transitions. [2021-07-13 19:17:25,291 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) [2021-07-13 19:17:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6130 transitions. [2021-07-13 19:17:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:25,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:25,293 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:25,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-07-13 19:17:25,507 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:25,507 INFO L82 PathProgramCache]: Analyzing trace with hash 682973831, now seen corresponding path program 180 times [2021-07-13 19:17:25,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:25,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603577537] [2021-07-13 19:17:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:25,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603577537] [2021-07-13 19:17:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603577537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445808271] [2021-07-13 19:17:25,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:25,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:25,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:25,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:25,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445808271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:25,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-07-13 19:17:25,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232562366] [2021-07-13 19:17:25,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:25,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:25,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:25,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:25,635 INFO L87 Difference]: Start difference. First operand 2170 states and 6130 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-07-13 19:17:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:25,701 INFO L93 Difference]: Finished difference Result 2664 states and 7257 transitions. [2021-07-13 19:17:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:25,705 INFO L225 Difference]: With dead ends: 2664 [2021-07-13 19:17:25,705 INFO L226 Difference]: Without dead ends: 2664 [2021-07-13 19:17:25,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-07-13 19:17:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2389. [2021-07-13 19:17:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8618090452261304) internal successors, (6834), 2388 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6834 transitions. [2021-07-13 19:17:25,733 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6834 transitions. Word has length 20 [2021-07-13 19:17:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:25,733 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6834 transitions. [2021-07-13 19:17:25,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-07-13 19:17:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6834 transitions. [2021-07-13 19:17:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:25,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:25,735 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:25,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:25,951 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1866538775, now seen corresponding path program 181 times [2021-07-13 19:17:25,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:25,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657406462] [2021-07-13 19:17:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657406462] [2021-07-13 19:17:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657406462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681370499] [2021-07-13 19:17:26,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:26,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681370499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:26,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-07-13 19:17:26,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422002106] [2021-07-13 19:17:26,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:26,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:26,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:26,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:26,096 INFO L87 Difference]: Start difference. First operand 2389 states and 6834 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:26,168 INFO L93 Difference]: Finished difference Result 2613 states and 7149 transitions. [2021-07-13 19:17:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:26,171 INFO L225 Difference]: With dead ends: 2613 [2021-07-13 19:17:26,171 INFO L226 Difference]: Without dead ends: 2613 [2021-07-13 19:17:26,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-07-13 19:17:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2388. [2021-07-13 19:17:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.860913280268119) internal successors, (6829), 2387 states have internal predecessors, (6829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6829 transitions. [2021-07-13 19:17:26,199 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6829 transitions. Word has length 20 [2021-07-13 19:17:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:26,199 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6829 transitions. [2021-07-13 19:17:26,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6829 transitions. [2021-07-13 19:17:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:26,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:26,202 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:26,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-07-13 19:17:26,418 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash -155925467, now seen corresponding path program 182 times [2021-07-13 19:17:26,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:26,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154510398] [2021-07-13 19:17:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:26,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154510398] [2021-07-13 19:17:26,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154510398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978639590] [2021-07-13 19:17:26,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:26,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:26,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:26,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978639590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:26,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-07-13 19:17:26,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232940970] [2021-07-13 19:17:26,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:26,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:26,541 INFO L87 Difference]: Start difference. First operand 2388 states and 6829 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-07-13 19:17:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:26,684 INFO L93 Difference]: Finished difference Result 2617 states and 7158 transitions. [2021-07-13 19:17:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:26,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:26,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:26,687 INFO L225 Difference]: With dead ends: 2617 [2021-07-13 19:17:26,687 INFO L226 Difference]: Without dead ends: 2615 [2021-07-13 19:17:26,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-07-13 19:17:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2388. [2021-07-13 19:17:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.8600754084625053) internal successors, (6827), 2387 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6827 transitions. [2021-07-13 19:17:26,715 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6827 transitions. Word has length 20 [2021-07-13 19:17:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:26,715 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6827 transitions. [2021-07-13 19:17:26,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-07-13 19:17:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6827 transitions. [2021-07-13 19:17:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:26,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:26,717 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-13 19:17:26,933 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1333479529, now seen corresponding path program 183 times [2021-07-13 19:17:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412236038] [2021-07-13 19:17:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:26,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412236038] [2021-07-13 19:17:26,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412236038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061719691] [2021-07-13 19:17:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:27,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:17:27,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:27,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:27,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061719691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:27,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-07-13 19:17:27,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594214892] [2021-07-13 19:17:27,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:27,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:27,060 INFO L87 Difference]: Start difference. First operand 2388 states and 6827 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-07-13 19:17:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:27,199 INFO L93 Difference]: Finished difference Result 2623 states and 7164 transitions. [2021-07-13 19:17:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:17:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:27,203 INFO L225 Difference]: With dead ends: 2623 [2021-07-13 19:17:27,203 INFO L226 Difference]: Without dead ends: 2619 [2021-07-13 19:17:27,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-07-13 19:17:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2395. [2021-07-13 19:17:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8613199665831246) internal successors, (6850), 2394 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6850 transitions. [2021-07-13 19:17:27,231 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6850 transitions. Word has length 20 [2021-07-13 19:17:27,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:27,231 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6850 transitions. [2021-07-13 19:17:27,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-07-13 19:17:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6850 transitions. [2021-07-13 19:17:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:27,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:27,234 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:27,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-07-13 19:17:27,449 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:27,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:27,449 INFO L82 PathProgramCache]: Analyzing trace with hash 260394149, now seen corresponding path program 184 times [2021-07-13 19:17:27,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:27,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953557130] [2021-07-13 19:17:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953557130] [2021-07-13 19:17:27,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953557130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133247947] [2021-07-13 19:17:27,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:27,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:27,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133247947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:27,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-07-13 19:17:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438987212] [2021-07-13 19:17:27,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:27,584 INFO L87 Difference]: Start difference. First operand 2395 states and 6850 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-13 19:17:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:27,721 INFO L93 Difference]: Finished difference Result 3316 states and 9099 transitions. [2021-07-13 19:17:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:27,726 INFO L225 Difference]: With dead ends: 3316 [2021-07-13 19:17:27,726 INFO L226 Difference]: Without dead ends: 3310 [2021-07-13 19:17:27,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-07-13 19:17:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2395. [2021-07-13 19:17:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8592314118629907) internal successors, (6845), 2394 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6845 transitions. [2021-07-13 19:17:27,757 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6845 transitions. Word has length 20 [2021-07-13 19:17:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:27,757 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6845 transitions. [2021-07-13 19:17:27,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2021-07-13 19:17:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6845 transitions. [2021-07-13 19:17:27,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:27,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:27,760 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:27,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,975 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1354485737, now seen corresponding path program 185 times [2021-07-13 19:17:27,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:27,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891027854] [2021-07-13 19:17:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891027854] [2021-07-13 19:17:28,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891027854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143509282] [2021-07-13 19:17:28,039 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 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 [2021-07-13 19:17:28,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:17:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143509282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:28,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-07-13 19:17:28,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272224368] [2021-07-13 19:17:28,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:28,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:28,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:28,114 INFO L87 Difference]: Start difference. First operand 2395 states and 6845 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:28,256 INFO L93 Difference]: Finished difference Result 3332 states and 9114 transitions. [2021-07-13 19:17:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:17:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:28,261 INFO L225 Difference]: With dead ends: 3332 [2021-07-13 19:17:28,261 INFO L226 Difference]: Without dead ends: 3324 [2021-07-13 19:17:28,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-07-13 19:17:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2411. [2021-07-13 19:17:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.85850622406639) internal successors, (6889), 2410 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6889 transitions. [2021-07-13 19:17:28,312 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6889 transitions. Word has length 20 [2021-07-13 19:17:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:28,312 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6889 transitions. [2021-07-13 19:17:28,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6889 transitions. [2021-07-13 19:17:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:28,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:28,315 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:28,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:28,530 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash 911586597, now seen corresponding path program 186 times [2021-07-13 19:17:28,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:28,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315073127] [2021-07-13 19:17:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:28,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315073127] [2021-07-13 19:17:28,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315073127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735232930] [2021-07-13 19:17:28,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:28,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:17:28,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:17:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735232930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:28,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-07-13 19:17:28,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138599050] [2021-07-13 19:17:28,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:28,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:28,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:28,671 INFO L87 Difference]: Start difference. First operand 2411 states and 6889 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:28,809 INFO L93 Difference]: Finished difference Result 3194 states and 8791 transitions. [2021-07-13 19:17:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:28,813 INFO L225 Difference]: With dead ends: 3194 [2021-07-13 19:17:28,813 INFO L226 Difference]: Without dead ends: 3184 [2021-07-13 19:17:28,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-07-13 19:17:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2411. [2021-07-13 19:17:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.857676348547718) internal successors, (6887), 2410 states have internal predecessors, (6887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6887 transitions. [2021-07-13 19:17:28,844 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6887 transitions. Word has length 20 [2021-07-13 19:17:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:28,844 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6887 transitions. [2021-07-13 19:17:28,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6887 transitions. [2021-07-13 19:17:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:28,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:28,846 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:29,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-07-13 19:17:29,063 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:29,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash 66615145, now seen corresponding path program 187 times [2021-07-13 19:17:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:29,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789431060] [2021-07-13 19:17:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:29,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:29,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789431060] [2021-07-13 19:17:29,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789431060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220693257] [2021-07-13 19:17:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:29,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220693257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:29,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-13 19:17:29,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471289493] [2021-07-13 19:17:29,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:17:29,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:17:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:29,219 INFO L87 Difference]: Start difference. First operand 2411 states and 6887 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) [2021-07-13 19:17:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:29,378 INFO L93 Difference]: Finished difference Result 3215 states and 8812 transitions. [2021-07-13 19:17:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:17:29,378 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 20 [2021-07-13 19:17:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:29,382 INFO L225 Difference]: With dead ends: 3215 [2021-07-13 19:17:29,382 INFO L226 Difference]: Without dead ends: 3203 [2021-07-13 19:17:29,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:17:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-07-13 19:17:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2417. [2021-07-13 19:17:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.857201986754967) internal successors, (6903), 2416 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6903 transitions. [2021-07-13 19:17:29,413 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6903 transitions. Word has length 20 [2021-07-13 19:17:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:29,413 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6903 transitions. [2021-07-13 19:17:29,413 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) [2021-07-13 19:17:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6903 transitions. [2021-07-13 19:17:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:17:29,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:29,416 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:29,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:29,632 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -357696091, now seen corresponding path program 188 times [2021-07-13 19:17:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:29,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681548623] [2021-07-13 19:17:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:29,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:29,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681548623] [2021-07-13 19:17:29,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681548623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014302714] [2021-07-13 19:17:29,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:29,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:29,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:17:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:29,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014302714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:29,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:29,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-13 19:17:29,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317246584] [2021-07-13 19:17:29,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:17:29,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:17:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:29,797 INFO L87 Difference]: Start difference. First operand 2417 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:29,941 INFO L93 Difference]: Finished difference Result 2609 states and 7349 transitions. [2021-07-13 19:17:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:17:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:17:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:29,945 INFO L225 Difference]: With dead ends: 2609 [2021-07-13 19:17:29,945 INFO L226 Difference]: Without dead ends: 2602 [2021-07-13 19:17:29,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:17:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-07-13 19:17:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2417. [2021-07-13 19:17:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8567880794701987) internal successors, (6902), 2416 states have internal predecessors, (6902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6902 transitions. [2021-07-13 19:17:29,972 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6902 transitions. Word has length 20 [2021-07-13 19:17:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:29,972 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6902 transitions. [2021-07-13 19:17:29,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6902 transitions. [2021-07-13 19:17:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:29,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:29,975 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:30,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-07-13 19:17:30,191 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 208179366, now seen corresponding path program 189 times [2021-07-13 19:17:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:30,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557820468] [2021-07-13 19:17:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:30,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:30,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557820468] [2021-07-13 19:17:30,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557820468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609769257] [2021-07-13 19:17:30,251 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 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 [2021-07-13 19:17:30,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:30,564 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 19:17:30,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:30,565 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 [2021-07-13 19:17:31,458 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-07-13 19:17:31,613 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-07-13 19:17:31,790 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 384 [2021-07-13 19:17:32,060 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 477 [2021-07-13 19:17:32,699 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 232 [2021-07-13 19:17:32,866 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 357 [2021-07-13 19:17:32,994 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 278 [2021-07-13 19:17:34,158 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 289 [2021-07-13 19:17:34,311 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 290 [2021-07-13 19:17:34,541 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 412 [2021-07-13 19:17:34,890 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 552 [2021-07-13 19:17:35,453 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-07-13 19:17:36,136 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-07-13 19:17:36,845 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 714 [2021-07-13 19:17:37,675 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 705 [2021-07-13 19:17:37,990 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 442 [2021-07-13 19:17:38,359 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 217 [2021-07-13 19:17:38,782 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-07-13 19:17:38,885 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-07-13 19:17:38,998 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 224 [2021-07-13 19:17:39,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:39,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:39,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:39,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609769257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793590124] [2021-07-13 19:17:39,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:39,235 INFO L87 Difference]: Start difference. First operand 2417 states and 6902 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:39,426 INFO L93 Difference]: Finished difference Result 2595 states and 7261 transitions. [2021-07-13 19:17:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:39,430 INFO L225 Difference]: With dead ends: 2595 [2021-07-13 19:17:39,430 INFO L226 Difference]: Without dead ends: 2592 [2021-07-13 19:17:39,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-07-13 19:17:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2489. [2021-07-13 19:17:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.8589228295819935) internal successors, (7113), 2488 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7113 transitions. [2021-07-13 19:17:39,458 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7113 transitions. Word has length 21 [2021-07-13 19:17:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:39,458 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 7113 transitions. [2021-07-13 19:17:39,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7113 transitions. [2021-07-13 19:17:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:39,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:39,461 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:39,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-13 19:17:39,677 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -120892348, now seen corresponding path program 190 times [2021-07-13 19:17:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:39,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359443372] [2021-07-13 19:17:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:39,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359443372] [2021-07-13 19:17:39,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359443372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918905276] [2021-07-13 19:17:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:39,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:39,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:39,996 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 [2021-07-13 19:17:40,738 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 258 [2021-07-13 19:17:41,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:41,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:41,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:41,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:41,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918905276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:41,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:41,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635695113] [2021-07-13 19:17:41,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:41,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:41,468 INFO L87 Difference]: Start difference. First operand 2489 states and 7113 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:41,681 INFO L93 Difference]: Finished difference Result 2702 states and 7537 transitions. [2021-07-13 19:17:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:41,686 INFO L225 Difference]: With dead ends: 2702 [2021-07-13 19:17:41,686 INFO L226 Difference]: Without dead ends: 2699 [2021-07-13 19:17:41,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-07-13 19:17:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2548. [2021-07-13 19:17:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 2.8696505692972125) internal successors, (7309), 2547 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 7309 transitions. [2021-07-13 19:17:41,718 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 7309 transitions. Word has length 21 [2021-07-13 19:17:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:41,718 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 7309 transitions. [2021-07-13 19:17:41,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 7309 transitions. [2021-07-13 19:17:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:41,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:41,721 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:41,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1211 [2021-07-13 19:17:41,937 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash 670459314, now seen corresponding path program 191 times [2021-07-13 19:17:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942000715] [2021-07-13 19:17:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:41,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:41,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942000715] [2021-07-13 19:17:41,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942000715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821969212] [2021-07-13 19:17:41,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:17:42,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:42,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:42,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:42,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:42,323 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 19:17:42,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:42,323 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 [2021-07-13 19:17:43,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:43,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:43,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:43,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:43,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821969212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:43,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:43,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061975375] [2021-07-13 19:17:43,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:43,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:43,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:43,387 INFO L87 Difference]: Start difference. First operand 2548 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:43,587 INFO L93 Difference]: Finished difference Result 2762 states and 7744 transitions. [2021-07-13 19:17:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:43,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:43,591 INFO L225 Difference]: With dead ends: 2762 [2021-07-13 19:17:43,591 INFO L226 Difference]: Without dead ends: 2759 [2021-07-13 19:17:43,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-07-13 19:17:43,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2605. [2021-07-13 19:17:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 2.883640552995392) internal successors, (7509), 2604 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 7509 transitions. [2021-07-13 19:17:43,621 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 7509 transitions. Word has length 21 [2021-07-13 19:17:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:43,621 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 7509 transitions. [2021-07-13 19:17:43,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 7509 transitions. [2021-07-13 19:17:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:43,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:43,624 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:43,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-07-13 19:17:43,840 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -567442940, now seen corresponding path program 192 times [2021-07-13 19:17:43,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:43,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947924010] [2021-07-13 19:17:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:43,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:43,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947924010] [2021-07-13 19:17:43,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947924010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259343931] [2021-07-13 19:17:43,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:43,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:17:43,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:44,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:44,172 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 [2021-07-13 19:17:45,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:45,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:45,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:45,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259343931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:45,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:45,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021647216] [2021-07-13 19:17:45,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:45,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:45,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:45,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:45,624 INFO L87 Difference]: Start difference. First operand 2605 states and 7509 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:45,892 INFO L93 Difference]: Finished difference Result 2824 states and 7965 transitions. [2021-07-13 19:17:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:45,896 INFO L225 Difference]: With dead ends: 2824 [2021-07-13 19:17:45,897 INFO L226 Difference]: Without dead ends: 2821 [2021-07-13 19:17:45,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-07-13 19:17:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2666. [2021-07-13 19:17:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.900187617260788) internal successors, (7729), 2665 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7729 transitions. [2021-07-13 19:17:45,928 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7729 transitions. Word has length 21 [2021-07-13 19:17:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:45,928 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7729 transitions. [2021-07-13 19:17:45,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7729 transitions. [2021-07-13 19:17:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:45,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:45,931 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:46,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:46,147 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash -287707150, now seen corresponding path program 193 times [2021-07-13 19:17:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:46,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315076571] [2021-07-13 19:17:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:46,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315076571] [2021-07-13 19:17:46,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315076571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219123265] [2021-07-13 19:17:46,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:46,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:46,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:46,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:46,473 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 [2021-07-13 19:17:47,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:47,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:47,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:47,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:47,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219123265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:47,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:47,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052961798] [2021-07-13 19:17:47,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:47,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:47,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:47,479 INFO L87 Difference]: Start difference. First operand 2666 states and 7729 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:47,673 INFO L93 Difference]: Finished difference Result 2927 states and 8298 transitions. [2021-07-13 19:17:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:47,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:47,678 INFO L225 Difference]: With dead ends: 2927 [2021-07-13 19:17:47,678 INFO L226 Difference]: Without dead ends: 2924 [2021-07-13 19:17:47,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-07-13 19:17:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2756. [2021-07-13 19:17:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.9219600725952812) internal successors, (8050), 2755 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 8050 transitions. [2021-07-13 19:17:47,711 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 8050 transitions. Word has length 21 [2021-07-13 19:17:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:47,711 INFO L482 AbstractCegarLoop]: Abstraction has 2756 states and 8050 transitions. [2021-07-13 19:17:47,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 8050 transitions. [2021-07-13 19:17:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:47,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:47,714 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:47,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1894 [2021-07-13 19:17:47,930 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -205832252, now seen corresponding path program 194 times [2021-07-13 19:17:47,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:47,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135093306] [2021-07-13 19:17:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:47,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:47,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135093306] [2021-07-13 19:17:47,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135093306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259576463] [2021-07-13 19:17:47,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:17:48,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:48,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:48,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:48,254 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 [2021-07-13 19:17:49,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:49,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:49,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:49,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259576463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:49,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265297285] [2021-07-13 19:17:49,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:49,067 INFO L87 Difference]: Start difference. First operand 2756 states and 8050 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:49,306 INFO L93 Difference]: Finished difference Result 3020 states and 8621 transitions. [2021-07-13 19:17:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:49,311 INFO L225 Difference]: With dead ends: 3020 [2021-07-13 19:17:49,311 INFO L226 Difference]: Without dead ends: 3017 [2021-07-13 19:17:49,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-07-13 19:17:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2845. [2021-07-13 19:17:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9433895921237694) internal successors, (8371), 2844 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8371 transitions. [2021-07-13 19:17:49,346 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8371 transitions. Word has length 21 [2021-07-13 19:17:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:49,346 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8371 transitions. [2021-07-13 19:17:49,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8371 transitions. [2021-07-13 19:17:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:49,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:49,349 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:49,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:49,565 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1962677710, now seen corresponding path program 195 times [2021-07-13 19:17:49,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:49,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447148200] [2021-07-13 19:17:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:49,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:49,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447148200] [2021-07-13 19:17:49,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447148200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667859242] [2021-07-13 19:17:49,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:17:49,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:17:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:49,930 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-13 19:17:49,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:49,931 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 [2021-07-13 19:17:50,480 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 320 [2021-07-13 19:17:50,698 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-07-13 19:17:50,826 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 368 [2021-07-13 19:17:51,004 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 431 [2021-07-13 19:17:51,165 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 410 [2021-07-13 19:17:51,599 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-07-13 19:17:51,723 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-07-13 19:17:51,860 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 312 [2021-07-13 19:17:52,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:52,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:52,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:52,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667859242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:52,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:52,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181364883] [2021-07-13 19:17:52,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:52,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:52,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:52,278 INFO L87 Difference]: Start difference. First operand 2845 states and 8371 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:52,557 INFO L93 Difference]: Finished difference Result 3164 states and 9122 transitions. [2021-07-13 19:17:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:52,562 INFO L225 Difference]: With dead ends: 3164 [2021-07-13 19:17:52,562 INFO L226 Difference]: Without dead ends: 3161 [2021-07-13 19:17:52,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-07-13 19:17:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3004. [2021-07-13 19:17:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.965700965700966) internal successors, (8906), 3003 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 8906 transitions. [2021-07-13 19:17:52,599 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 8906 transitions. Word has length 21 [2021-07-13 19:17:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:52,600 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 8906 transitions. [2021-07-13 19:17:52,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 8906 transitions. [2021-07-13 19:17:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:52,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:52,603 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:52,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2227 [2021-07-13 19:17:52,819 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash -590312060, now seen corresponding path program 196 times [2021-07-13 19:17:52,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:52,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576372857] [2021-07-13 19:17:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:52,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576372857] [2021-07-13 19:17:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576372857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280454084] [2021-07-13 19:17:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:17:52,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:52,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:52,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:53,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:53,152 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 [2021-07-13 19:17:54,155 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-07-13 19:17:54,271 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-07-13 19:17:54,399 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 249 [2021-07-13 19:17:54,570 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 333 [2021-07-13 19:17:54,757 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 302 [2021-07-13 19:17:55,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:55,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:55,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:55,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:55,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280454084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:55,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:55,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172612809] [2021-07-13 19:17:55,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:55,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:55,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:55,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:55,318 INFO L87 Difference]: Start difference. First operand 3004 states and 8906 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:55,541 INFO L93 Difference]: Finished difference Result 3650 states and 10596 transitions. [2021-07-13 19:17:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:55,547 INFO L225 Difference]: With dead ends: 3650 [2021-07-13 19:17:55,547 INFO L226 Difference]: Without dead ends: 3647 [2021-07-13 19:17:55,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-07-13 19:17:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3491. [2021-07-13 19:17:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 2.9773638968481375) internal successors, (10391), 3490 states have internal predecessors, (10391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 10391 transitions. [2021-07-13 19:17:55,620 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 10391 transitions. Word has length 21 [2021-07-13 19:17:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:55,620 INFO L482 AbstractCegarLoop]: Abstraction has 3491 states and 10391 transitions. [2021-07-13 19:17:55,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 10391 transitions. [2021-07-13 19:17:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:17:55,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:55,624 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:55,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-07-13 19:17:55,840 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash -996649870, now seen corresponding path program 197 times [2021-07-13 19:17:55,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:55,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671104892] [2021-07-13 19:17:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:55,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:55,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671104892] [2021-07-13 19:17:55,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671104892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500874405] [2021-07-13 19:17:55,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:17:55,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:17:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:55,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:56,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:56,183 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 [2021-07-13 19:17:57,271 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 225 [2021-07-13 19:17:57,417 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-07-13 19:17:57,562 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-07-13 19:17:57,765 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 298 [2021-07-13 19:17:58,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:58,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:58,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:58,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:17:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500874405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:58,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 19:17:58,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289170406] [2021-07-13 19:17:58,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:17:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:58,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:17:58,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:58,283 INFO L87 Difference]: Start difference. First operand 3491 states and 10391 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:58,528 INFO L93 Difference]: Finished difference Result 4057 states and 11844 transitions. [2021-07-13 19:17:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:17:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:58,534 INFO L225 Difference]: With dead ends: 4057 [2021-07-13 19:17:58,534 INFO L226 Difference]: Without dead ends: 4054 [2021-07-13 19:17:58,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:58,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-07-13 19:17:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3906. [2021-07-13 19:17:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3905 states have (on average 2.9836107554417413) internal successors, (11651), 3905 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 11651 transitions. [2021-07-13 19:17:58,585 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 11651 transitions. Word has length 21 [2021-07-13 19:17:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:58,585 INFO L482 AbstractCegarLoop]: Abstraction has 3906 states and 11651 transitions. [2021-07-13 19:17:58,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 11651 transitions. [2021-07-13 19:17:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:17:58,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:58,590 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:58,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2674,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:58,806 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash -836665722, now seen corresponding path program 198 times [2021-07-13 19:17:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:58,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608691305] [2021-07-13 19:17:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608691305] [2021-07-13 19:17:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608691305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545689003] [2021-07-13 19:17:58,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:17:58,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:17:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:17:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545689003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:58,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:17:58,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587074069] [2021-07-13 19:17:58,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:58,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:58,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:58,958 INFO L87 Difference]: Start difference. First operand 3906 states and 11651 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:17:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:59,141 INFO L93 Difference]: Finished difference Result 4087 states and 11914 transitions. [2021-07-13 19:17:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:17:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:59,147 INFO L225 Difference]: With dead ends: 4087 [2021-07-13 19:17:59,147 INFO L226 Difference]: Without dead ends: 4087 [2021-07-13 19:17:59,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:17:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-07-13 19:17:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3867. [2021-07-13 19:17:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.982152095188826) internal successors, (11529), 3866 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11529 transitions. [2021-07-13 19:17:59,200 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11529 transitions. Word has length 22 [2021-07-13 19:17:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:59,200 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11529 transitions. [2021-07-13 19:17:59,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:17:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11529 transitions. [2021-07-13 19:17:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:17:59,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:59,205 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:59,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2911 [2021-07-13 19:17:59,405 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2113302545, now seen corresponding path program 199 times [2021-07-13 19:17:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:59,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573162939] [2021-07-13 19:17:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:59,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573162939] [2021-07-13 19:17:59,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573162939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421549032] [2021-07-13 19:17:59,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:17:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:17:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:59,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421549032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:59,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:59,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:17:59,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056659242] [2021-07-13 19:17:59,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:59,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:59,559 INFO L87 Difference]: Start difference. First operand 3867 states and 11529 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:17:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:59,805 INFO L93 Difference]: Finished difference Result 4251 states and 12125 transitions. [2021-07-13 19:17:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:17:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:17:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:59,811 INFO L225 Difference]: With dead ends: 4251 [2021-07-13 19:17:59,811 INFO L226 Difference]: Without dead ends: 4240 [2021-07-13 19:17:59,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:17:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-07-13 19:17:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3890. [2021-07-13 19:17:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978657752635639) internal successors, (11584), 3889 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11584 transitions. [2021-07-13 19:17:59,863 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11584 transitions. Word has length 22 [2021-07-13 19:17:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:59,864 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11584 transitions. [2021-07-13 19:17:59,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:17:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11584 transitions. [2021-07-13 19:17:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:17:59,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:59,868 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:00,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,084 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 579717254, now seen corresponding path program 200 times [2021-07-13 19:18:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:00,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361639456] [2021-07-13 19:18:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:00,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361639456] [2021-07-13 19:18:00,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361639456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305382802] [2021-07-13 19:18:00,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:00,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:00,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:00,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:00,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305382802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:00,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267685572] [2021-07-13 19:18:00,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:00,196 INFO L87 Difference]: Start difference. First operand 3890 states and 11584 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) [2021-07-13 19:18:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:00,347 INFO L93 Difference]: Finished difference Result 3929 states and 11639 transitions. [2021-07-13 19:18:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:00,347 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 22 [2021-07-13 19:18:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:00,353 INFO L225 Difference]: With dead ends: 3929 [2021-07-13 19:18:00,353 INFO L226 Difference]: Without dead ends: 3928 [2021-07-13 19:18:00,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-07-13 19:18:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3890. [2021-07-13 19:18:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978143481614811) internal successors, (11582), 3889 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11582 transitions. [2021-07-13 19:18:00,400 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11582 transitions. Word has length 22 [2021-07-13 19:18:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:00,400 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11582 transitions. [2021-07-13 19:18:00,400 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) [2021-07-13 19:18:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11582 transitions. [2021-07-13 19:18:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:00,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:00,404 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:00,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2913,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,620 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1496773607, now seen corresponding path program 201 times [2021-07-13 19:18:00,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:00,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867010242] [2021-07-13 19:18:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:00,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:00,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867010242] [2021-07-13 19:18:00,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867010242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108378363] [2021-07-13 19:18:00,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:00,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:00,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:00,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108378363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:00,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:00,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347508763] [2021-07-13 19:18:00,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:00,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:00,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:00,738 INFO L87 Difference]: Start difference. First operand 3890 states and 11582 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) [2021-07-13 19:18:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:00,800 INFO L93 Difference]: Finished difference Result 4355 states and 12410 transitions. [2021-07-13 19:18:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:00,801 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 22 [2021-07-13 19:18:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:00,806 INFO L225 Difference]: With dead ends: 4355 [2021-07-13 19:18:00,807 INFO L226 Difference]: Without dead ends: 4355 [2021-07-13 19:18:00,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-07-13 19:18:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3867. [2021-07-13 19:18:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.9733574754267975) internal successors, (11495), 3866 states have internal predecessors, (11495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11495 transitions. [2021-07-13 19:18:00,857 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11495 transitions. Word has length 22 [2021-07-13 19:18:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:00,857 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11495 transitions. [2021-07-13 19:18:00,857 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) [2021-07-13 19:18:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11495 transitions. [2021-07-13 19:18:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:00,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:00,862 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:01,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2914,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:01,077 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash -374385774, now seen corresponding path program 202 times [2021-07-13 19:18:01,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:01,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829207105] [2021-07-13 19:18:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:01,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829207105] [2021-07-13 19:18:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829207105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434874923] [2021-07-13 19:18:01,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:01,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:01,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:01,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434874923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:01,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279877561] [2021-07-13 19:18:01,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:01,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:01,190 INFO L87 Difference]: Start difference. First operand 3867 states and 11495 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) [2021-07-13 19:18:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:01,304 INFO L93 Difference]: Finished difference Result 4245 states and 12197 transitions. [2021-07-13 19:18:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:01,304 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 22 [2021-07-13 19:18:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:01,311 INFO L225 Difference]: With dead ends: 4245 [2021-07-13 19:18:01,311 INFO L226 Difference]: Without dead ends: 4245 [2021-07-13 19:18:01,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-07-13 19:18:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3908. [2021-07-13 19:18:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 2.975172766828769) internal successors, (11624), 3907 states have internal predecessors, (11624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 11624 transitions. [2021-07-13 19:18:01,363 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 11624 transitions. Word has length 22 [2021-07-13 19:18:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 11624 transitions. [2021-07-13 19:18:01,364 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) [2021-07-13 19:18:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 11624 transitions. [2021-07-13 19:18:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:01,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:01,368 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:01,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:01,584 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash 570376209, now seen corresponding path program 203 times [2021-07-13 19:18:01,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:01,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903793897] [2021-07-13 19:18:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:01,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:01,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903793897] [2021-07-13 19:18:01,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903793897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474817436] [2021-07-13 19:18:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:01,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:01,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:01,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474817436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:01,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:01,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939594515] [2021-07-13 19:18:01,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:01,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:01,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:01,692 INFO L87 Difference]: Start difference. First operand 3908 states and 11624 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) [2021-07-13 19:18:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:01,825 INFO L93 Difference]: Finished difference Result 4249 states and 12137 transitions. [2021-07-13 19:18:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:01,825 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 22 [2021-07-13 19:18:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:01,831 INFO L225 Difference]: With dead ends: 4249 [2021-07-13 19:18:01,831 INFO L226 Difference]: Without dead ends: 4247 [2021-07-13 19:18:01,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-07-13 19:18:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3918. [2021-07-13 19:18:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 2.976257339800868) internal successors, (11658), 3917 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 11658 transitions. [2021-07-13 19:18:01,882 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 11658 transitions. Word has length 22 [2021-07-13 19:18:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:01,882 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 11658 transitions. [2021-07-13 19:18:01,882 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) [2021-07-13 19:18:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 11658 transitions. [2021-07-13 19:18:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:01,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:01,887 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:02,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2916,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:02,102 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:02,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1371068916, now seen corresponding path program 204 times [2021-07-13 19:18:02,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:02,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691056456] [2021-07-13 19:18:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:02,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:02,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691056456] [2021-07-13 19:18:02,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691056456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947355706] [2021-07-13 19:18:02,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:02,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:02,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947355706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:02,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:02,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767534737] [2021-07-13 19:18:02,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:02,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:02,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:02,212 INFO L87 Difference]: Start difference. First operand 3918 states and 11658 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) [2021-07-13 19:18:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:02,359 INFO L93 Difference]: Finished difference Result 4124 states and 11966 transitions. [2021-07-13 19:18:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:02,359 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 22 [2021-07-13 19:18:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:02,365 INFO L225 Difference]: With dead ends: 4124 [2021-07-13 19:18:02,365 INFO L226 Difference]: Without dead ends: 4122 [2021-07-13 19:18:02,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-07-13 19:18:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3900. [2021-07-13 19:18:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.9746088740702743) internal successors, (11598), 3899 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11598 transitions. [2021-07-13 19:18:02,415 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11598 transitions. Word has length 22 [2021-07-13 19:18:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:02,415 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 11598 transitions. [2021-07-13 19:18:02,415 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) [2021-07-13 19:18:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11598 transitions. [2021-07-13 19:18:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:02,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:02,420 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:02,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2917,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:02,621 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2006842027, now seen corresponding path program 205 times [2021-07-13 19:18:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259571024] [2021-07-13 19:18:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:02,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:02,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259571024] [2021-07-13 19:18:02,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259571024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81524618] [2021-07-13 19:18:02,676 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 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 [2021-07-13 19:18:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:02,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81524618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:02,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489590819] [2021-07-13 19:18:02,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:02,739 INFO L87 Difference]: Start difference. First operand 3900 states and 11598 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) [2021-07-13 19:18:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:02,807 INFO L93 Difference]: Finished difference Result 4352 states and 12338 transitions. [2021-07-13 19:18:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:02,807 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 22 [2021-07-13 19:18:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:02,813 INFO L225 Difference]: With dead ends: 4352 [2021-07-13 19:18:02,813 INFO L226 Difference]: Without dead ends: 4352 [2021-07-13 19:18:02,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-07-13 19:18:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3904. [2021-07-13 19:18:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.9741224698949527) internal successors, (11608), 3903 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 11608 transitions. [2021-07-13 19:18:02,864 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 11608 transitions. Word has length 22 [2021-07-13 19:18:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:02,864 INFO L482 AbstractCegarLoop]: Abstraction has 3904 states and 11608 transitions. [2021-07-13 19:18:02,864 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) [2021-07-13 19:18:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 11608 transitions. [2021-07-13 19:18:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:02,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:02,869 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:03,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:03,077 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1213285072, now seen corresponding path program 206 times [2021-07-13 19:18:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:03,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161293558] [2021-07-13 19:18:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:03,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161293558] [2021-07-13 19:18:03,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161293558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700240595] [2021-07-13 19:18:03,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:03,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700240595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:03,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:18:03,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379003788] [2021-07-13 19:18:03,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:03,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:03,197 INFO L87 Difference]: Start difference. First operand 3904 states and 11608 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) [2021-07-13 19:18:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:03,372 INFO L93 Difference]: Finished difference Result 4085 states and 11883 transitions. [2021-07-13 19:18:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:18:03,372 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 22 [2021-07-13 19:18:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:03,378 INFO L225 Difference]: With dead ends: 4085 [2021-07-13 19:18:03,378 INFO L226 Difference]: Without dead ends: 4079 [2021-07-13 19:18:03,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2021-07-13 19:18:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 3861. [2021-07-13 19:18:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.978238341968912) internal successors, (11496), 3860 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 11496 transitions. [2021-07-13 19:18:03,428 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 11496 transitions. Word has length 22 [2021-07-13 19:18:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:03,428 INFO L482 AbstractCegarLoop]: Abstraction has 3861 states and 11496 transitions. [2021-07-13 19:18:03,428 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) [2021-07-13 19:18:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 11496 transitions. [2021-07-13 19:18:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:03,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:03,433 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:03,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-07-13 19:18:03,647 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 559077935, now seen corresponding path program 207 times [2021-07-13 19:18:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:03,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642945798] [2021-07-13 19:18:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:03,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642945798] [2021-07-13 19:18:03,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642945798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850573481] [2021-07-13 19:18:03,701 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 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 [2021-07-13 19:18:03,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:03,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:03,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850573481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:03,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:18:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910698590] [2021-07-13 19:18:03,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:03,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:03,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:03,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:03,771 INFO L87 Difference]: Start difference. First operand 3861 states and 11496 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) [2021-07-13 19:18:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:03,854 INFO L93 Difference]: Finished difference Result 4587 states and 12943 transitions. [2021-07-13 19:18:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:03,854 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 22 [2021-07-13 19:18:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:03,860 INFO L225 Difference]: With dead ends: 4587 [2021-07-13 19:18:03,860 INFO L226 Difference]: Without dead ends: 4587 [2021-07-13 19:18:03,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-07-13 19:18:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3836. [2021-07-13 19:18:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 2.9734028683181224) internal successors, (11403), 3835 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 11403 transitions. [2021-07-13 19:18:03,913 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 11403 transitions. Word has length 22 [2021-07-13 19:18:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:03,914 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 11403 transitions. [2021-07-13 19:18:03,914 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) [2021-07-13 19:18:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 11403 transitions. [2021-07-13 19:18:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:03,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:03,918 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:04,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2920 [2021-07-13 19:18:04,133 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1612288028, now seen corresponding path program 208 times [2021-07-13 19:18:04,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:04,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151677712] [2021-07-13 19:18:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:04,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151677712] [2021-07-13 19:18:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151677712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131044883] [2021-07-13 19:18:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:04,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:04,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131044883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:04,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:04,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384672799] [2021-07-13 19:18:04,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:04,250 INFO L87 Difference]: Start difference. First operand 3836 states and 11403 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) [2021-07-13 19:18:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:04,352 INFO L93 Difference]: Finished difference Result 4225 states and 12107 transitions. [2021-07-13 19:18:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:04,353 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 22 [2021-07-13 19:18:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:04,358 INFO L225 Difference]: With dead ends: 4225 [2021-07-13 19:18:04,358 INFO L226 Difference]: Without dead ends: 4225 [2021-07-13 19:18:04,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-07-13 19:18:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3857. [2021-07-13 19:18:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 2.975103734439834) internal successors, (11472), 3856 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 11472 transitions. [2021-07-13 19:18:04,410 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 11472 transitions. Word has length 22 [2021-07-13 19:18:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:04,410 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 11472 transitions. [2021-07-13 19:18:04,410 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) [2021-07-13 19:18:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 11472 transitions. [2021-07-13 19:18:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:04,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:04,414 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:04,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2921 [2021-07-13 19:18:04,629 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:04,630 INFO L82 PathProgramCache]: Analyzing trace with hash -667526045, now seen corresponding path program 209 times [2021-07-13 19:18:04,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:04,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311534683] [2021-07-13 19:18:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:04,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311534683] [2021-07-13 19:18:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311534683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160208761] [2021-07-13 19:18:04,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:04,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:18:04,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:04,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160208761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:04,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388542869] [2021-07-13 19:18:04,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:04,737 INFO L87 Difference]: Start difference. First operand 3857 states and 11472 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) [2021-07-13 19:18:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:04,871 INFO L93 Difference]: Finished difference Result 4205 states and 11997 transitions. [2021-07-13 19:18:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:04,872 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 22 [2021-07-13 19:18:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:04,877 INFO L225 Difference]: With dead ends: 4205 [2021-07-13 19:18:04,877 INFO L226 Difference]: Without dead ends: 4203 [2021-07-13 19:18:04,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-07-13 19:18:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3869. [2021-07-13 19:18:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.9762150982419855) internal successors, (11512), 3868 states have internal predecessors, (11512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 11512 transitions. [2021-07-13 19:18:04,955 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 11512 transitions. Word has length 22 [2021-07-13 19:18:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:04,955 INFO L482 AbstractCegarLoop]: Abstraction has 3869 states and 11512 transitions. [2021-07-13 19:18:04,955 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) [2021-07-13 19:18:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 11512 transitions. [2021-07-13 19:18:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:04,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:04,960 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:05,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2922,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:05,175 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:05,176 INFO L82 PathProgramCache]: Analyzing trace with hash 133166662, now seen corresponding path program 210 times [2021-07-13 19:18:05,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:05,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445283256] [2021-07-13 19:18:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:05,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:05,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445283256] [2021-07-13 19:18:05,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445283256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:05,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135988528] [2021-07-13 19:18:05,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:05,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:18:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:05,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135988528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:05,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:05,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:05,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14991035] [2021-07-13 19:18:05,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:05,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:05,284 INFO L87 Difference]: Start difference. First operand 3869 states and 11512 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) [2021-07-13 19:18:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:05,428 INFO L93 Difference]: Finished difference Result 4090 states and 11844 transitions. [2021-07-13 19:18:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:05,429 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 22 [2021-07-13 19:18:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:05,435 INFO L225 Difference]: With dead ends: 4090 [2021-07-13 19:18:05,435 INFO L226 Difference]: Without dead ends: 4088 [2021-07-13 19:18:05,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-07-13 19:18:05,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3838. [2021-07-13 19:18:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.973416731821736) internal successors, (11409), 3837 states have internal predecessors, (11409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11409 transitions. [2021-07-13 19:18:05,485 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11409 transitions. Word has length 22 [2021-07-13 19:18:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:05,485 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11409 transitions. [2021-07-13 19:18:05,485 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) [2021-07-13 19:18:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11409 transitions. [2021-07-13 19:18:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:05,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:05,489 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:05,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:05,705 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1050223015, now seen corresponding path program 211 times [2021-07-13 19:18:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:05,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096819015] [2021-07-13 19:18:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:05,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:05,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096819015] [2021-07-13 19:18:05,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096819015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:05,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864051288] [2021-07-13 19:18:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:05,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864051288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:05,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:05,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:05,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047372867] [2021-07-13 19:18:05,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:05,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:05,820 INFO L87 Difference]: Start difference. First operand 3838 states and 11409 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) [2021-07-13 19:18:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:05,879 INFO L93 Difference]: Finished difference Result 4172 states and 11863 transitions. [2021-07-13 19:18:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:05,879 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 22 [2021-07-13 19:18:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:05,885 INFO L225 Difference]: With dead ends: 4172 [2021-07-13 19:18:05,886 INFO L226 Difference]: Without dead ends: 4172 [2021-07-13 19:18:05,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-07-13 19:18:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3828. [2021-07-13 19:18:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.9699503527567286) internal successors, (11366), 3827 states have internal predecessors, (11366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11366 transitions. [2021-07-13 19:18:05,945 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11366 transitions. Word has length 22 [2021-07-13 19:18:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:05,945 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11366 transitions. [2021-07-13 19:18:05,945 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) [2021-07-13 19:18:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11366 transitions. [2021-07-13 19:18:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:05,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:05,950 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:06,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:06,166 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779970, now seen corresponding path program 212 times [2021-07-13 19:18:06,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:06,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483714117] [2021-07-13 19:18:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:06,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:06,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483714117] [2021-07-13 19:18:06,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483714117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:06,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293209631] [2021-07-13 19:18:06,222 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 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 [2021-07-13 19:18:06,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:06,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293209631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:06,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:06,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:06,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620350134] [2021-07-13 19:18:06,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:06,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:06,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:06,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:06,280 INFO L87 Difference]: Start difference. First operand 3828 states and 11366 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) [2021-07-13 19:18:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:06,449 INFO L93 Difference]: Finished difference Result 4046 states and 11697 transitions. [2021-07-13 19:18:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:18:06,449 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 22 [2021-07-13 19:18:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:06,456 INFO L225 Difference]: With dead ends: 4046 [2021-07-13 19:18:06,456 INFO L226 Difference]: Without dead ends: 4044 [2021-07-13 19:18:06,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-07-13 19:18:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 3828. [2021-07-13 19:18:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.969427750195976) internal successors, (11364), 3827 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11364 transitions. [2021-07-13 19:18:06,512 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11364 transitions. Word has length 22 [2021-07-13 19:18:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11364 transitions. [2021-07-13 19:18:06,512 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) [2021-07-13 19:18:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11364 transitions. [2021-07-13 19:18:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:06,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:06,517 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:06,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2925,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:06,733 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash -678824319, now seen corresponding path program 213 times [2021-07-13 19:18:06,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:06,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234299921] [2021-07-13 19:18:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:06,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:06,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234299921] [2021-07-13 19:18:06,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234299921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:06,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014409191] [2021-07-13 19:18:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:06,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:18:06,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:06,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:06,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014409191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:06,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:06,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:06,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195077015] [2021-07-13 19:18:06,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:06,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:06,853 INFO L87 Difference]: Start difference. First operand 3828 states and 11364 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) [2021-07-13 19:18:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:06,935 INFO L93 Difference]: Finished difference Result 4424 states and 12469 transitions. [2021-07-13 19:18:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:06,935 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 22 [2021-07-13 19:18:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:06,942 INFO L225 Difference]: With dead ends: 4424 [2021-07-13 19:18:06,942 INFO L226 Difference]: Without dead ends: 4424 [2021-07-13 19:18:06,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-07-13 19:18:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3838. [2021-07-13 19:18:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.9689861871253584) internal successors, (11392), 3837 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11392 transitions. [2021-07-13 19:18:06,994 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11392 transitions. Word has length 22 [2021-07-13 19:18:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:06,994 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11392 transitions. [2021-07-13 19:18:06,994 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) [2021-07-13 19:18:06,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11392 transitions. [2021-07-13 19:18:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:06,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:06,998 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:07,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2926,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:07,214 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:07,214 INFO L82 PathProgramCache]: Analyzing trace with hash -961782330, now seen corresponding path program 214 times [2021-07-13 19:18:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:07,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365734115] [2021-07-13 19:18:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:07,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:07,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365734115] [2021-07-13 19:18:07,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365734115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131212309] [2021-07-13 19:18:07,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:07,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:07,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:07,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:07,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131212309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:07,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131356794] [2021-07-13 19:18:07,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:07,329 INFO L87 Difference]: Start difference. First operand 3838 states and 11392 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) [2021-07-13 19:18:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:07,469 INFO L93 Difference]: Finished difference Result 4109 states and 11999 transitions. [2021-07-13 19:18:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:07,469 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 22 [2021-07-13 19:18:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:07,474 INFO L225 Difference]: With dead ends: 4109 [2021-07-13 19:18:07,475 INFO L226 Difference]: Without dead ends: 4106 [2021-07-13 19:18:07,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-07-13 19:18:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3841. [2021-07-13 19:18:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 2.968489583333333) internal successors, (11399), 3840 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 11399 transitions. [2021-07-13 19:18:07,524 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 11399 transitions. Word has length 22 [2021-07-13 19:18:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:07,524 INFO L482 AbstractCegarLoop]: Abstraction has 3841 states and 11399 transitions. [2021-07-13 19:18:07,524 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) [2021-07-13 19:18:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 11399 transitions. [2021-07-13 19:18:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:07,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:07,528 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:07,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:07,743 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1555283175, now seen corresponding path program 215 times [2021-07-13 19:18:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:07,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668746977] [2021-07-13 19:18:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:07,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:07,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668746977] [2021-07-13 19:18:07,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668746977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721007257] [2021-07-13 19:18:07,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:07,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:18:07,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:07,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:07,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721007257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:07,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592466368] [2021-07-13 19:18:07,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:07,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:07,866 INFO L87 Difference]: Start difference. First operand 3841 states and 11399 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) [2021-07-13 19:18:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:07,976 INFO L93 Difference]: Finished difference Result 5862 states and 16951 transitions. [2021-07-13 19:18:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:07,977 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 22 [2021-07-13 19:18:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:07,985 INFO L225 Difference]: With dead ends: 5862 [2021-07-13 19:18:07,985 INFO L226 Difference]: Without dead ends: 5862 [2021-07-13 19:18:07,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-07-13 19:18:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5031. [2021-07-13 19:18:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 3.0290258449304175) internal successors, (15236), 5030 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 15236 transitions. [2021-07-13 19:18:08,051 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 15236 transitions. Word has length 22 [2021-07-13 19:18:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 5031 states and 15236 transitions. [2021-07-13 19:18:08,051 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) [2021-07-13 19:18:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 15236 transitions. [2021-07-13 19:18:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:08,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:08,057 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:08,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2928,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:08,258 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash -69053073, now seen corresponding path program 216 times [2021-07-13 19:18:08,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:08,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046277775] [2021-07-13 19:18:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:08,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:08,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046277775] [2021-07-13 19:18:08,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046277775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:08,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815784801] [2021-07-13 19:18:08,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:08,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:08,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:08,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:08,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815784801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:08,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714117137] [2021-07-13 19:18:08,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:08,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:08,381 INFO L87 Difference]: Start difference. First operand 5031 states and 15236 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) [2021-07-13 19:18:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:08,517 INFO L93 Difference]: Finished difference Result 5380 states and 15831 transitions. [2021-07-13 19:18:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:08,517 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 22 [2021-07-13 19:18:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:08,525 INFO L225 Difference]: With dead ends: 5380 [2021-07-13 19:18:08,525 INFO L226 Difference]: Without dead ends: 5376 [2021-07-13 19:18:08,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-07-13 19:18:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5084. [2021-07-13 19:18:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 3.0334448160535117) internal successors, (15419), 5083 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 15419 transitions. [2021-07-13 19:18:08,593 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 15419 transitions. Word has length 22 [2021-07-13 19:18:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:08,593 INFO L482 AbstractCegarLoop]: Abstraction has 5084 states and 15419 transitions. [2021-07-13 19:18:08,593 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) [2021-07-13 19:18:08,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 15419 transitions. [2021-07-13 19:18:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:08,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:08,599 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:08,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:08,814 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash -175700274, now seen corresponding path program 217 times [2021-07-13 19:18:08,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:08,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951688066] [2021-07-13 19:18:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:08,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:08,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951688066] [2021-07-13 19:18:08,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951688066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:08,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673365512] [2021-07-13 19:18:08,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:08,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673365512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:08,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:08,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:08,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985818523] [2021-07-13 19:18:08,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:08,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:08,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:08,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:08,934 INFO L87 Difference]: Start difference. First operand 5084 states and 15419 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) [2021-07-13 19:18:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:09,078 INFO L93 Difference]: Finished difference Result 5286 states and 15759 transitions. [2021-07-13 19:18:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:09,079 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 22 [2021-07-13 19:18:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:09,086 INFO L225 Difference]: With dead ends: 5286 [2021-07-13 19:18:09,086 INFO L226 Difference]: Without dead ends: 5280 [2021-07-13 19:18:09,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-07-13 19:18:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 5075. [2021-07-13 19:18:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.034095388253843) internal successors, (15395), 5074 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 15395 transitions. [2021-07-13 19:18:09,155 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 15395 transitions. Word has length 22 [2021-07-13 19:18:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:09,156 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 15395 transitions. [2021-07-13 19:18:09,156 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) [2021-07-13 19:18:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 15395 transitions. [2021-07-13 19:18:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:09,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:09,161 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:09,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-07-13 19:18:09,365 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:09,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1953602065, now seen corresponding path program 218 times [2021-07-13 19:18:09,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:09,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678479881] [2021-07-13 19:18:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:09,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:09,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678479881] [2021-07-13 19:18:09,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678479881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:09,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585093657] [2021-07-13 19:18:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:09,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:09,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:09,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585093657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:09,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:09,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:09,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457612671] [2021-07-13 19:18:09,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:09,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:09,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:09,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:09,478 INFO L87 Difference]: Start difference. First operand 5075 states and 15395 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) [2021-07-13 19:18:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:09,585 INFO L93 Difference]: Finished difference Result 6136 states and 17834 transitions. [2021-07-13 19:18:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:09,585 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 22 [2021-07-13 19:18:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:09,594 INFO L225 Difference]: With dead ends: 6136 [2021-07-13 19:18:09,594 INFO L226 Difference]: Without dead ends: 6136 [2021-07-13 19:18:09,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-07-13 19:18:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 3901. [2021-07-13 19:18:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.9856410256410255) internal successors, (11644), 3900 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 11644 transitions. [2021-07-13 19:18:09,706 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 11644 transitions. Word has length 22 [2021-07-13 19:18:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:09,706 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 11644 transitions. [2021-07-13 19:18:09,706 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) [2021-07-13 19:18:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 11644 transitions. [2021-07-13 19:18:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:09,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:09,710 INFO L508 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:09,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2931 [2021-07-13 19:18:09,925 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1332552238, now seen corresponding path program 219 times [2021-07-13 19:18:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:09,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073579755] [2021-07-13 19:18:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:09,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073579755] [2021-07-13 19:18:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073579755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613443816] [2021-07-13 19:18:09,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:09,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:18:09,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:09,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:18:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:18:10,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613443816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:10,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:10,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 19:18:10,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983788209] [2021-07-13 19:18:10,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:18:10,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:10,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:18:10,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:10,119 INFO L87 Difference]: Start difference. First operand 3901 states and 11644 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:11,366 INFO L93 Difference]: Finished difference Result 9069 states and 26193 transitions. [2021-07-13 19:18:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 19:18:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:11,380 INFO L225 Difference]: With dead ends: 9069 [2021-07-13 19:18:11,380 INFO L226 Difference]: Without dead ends: 9055 [2021-07-13 19:18:11,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=1057, Invalid=8255, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 19:18:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2021-07-13 19:18:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5387. [2021-07-13 19:18:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 2.9433717044188636) internal successors, (15853), 5386 states have internal predecessors, (15853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 15853 transitions. [2021-07-13 19:18:11,481 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 15853 transitions. Word has length 22 [2021-07-13 19:18:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:11,481 INFO L482 AbstractCegarLoop]: Abstraction has 5387 states and 15853 transitions. [2021-07-13 19:18:11,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 15853 transitions. [2021-07-13 19:18:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:11,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:11,487 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:11,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2932,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:11,701 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -387790255, now seen corresponding path program 220 times [2021-07-13 19:18:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:11,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605377038] [2021-07-13 19:18:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:11,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605377038] [2021-07-13 19:18:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605377038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113562148] [2021-07-13 19:18:11,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:11,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:11,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:11,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:11,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113562148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:11,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:11,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:11,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637356201] [2021-07-13 19:18:11,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:11,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:11,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:11,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:11,858 INFO L87 Difference]: Start difference. First operand 5387 states and 15853 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) [2021-07-13 19:18:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:12,012 INFO L93 Difference]: Finished difference Result 5771 states and 16395 transitions. [2021-07-13 19:18:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:12,013 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 22 [2021-07-13 19:18:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:12,021 INFO L225 Difference]: With dead ends: 5771 [2021-07-13 19:18:12,021 INFO L226 Difference]: Without dead ends: 5767 [2021-07-13 19:18:12,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-07-13 19:18:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5367. [2021-07-13 19:18:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 2.9403652627655608) internal successors, (15778), 5366 states have internal predecessors, (15778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 15778 transitions. [2021-07-13 19:18:12,095 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 15778 transitions. Word has length 22 [2021-07-13 19:18:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:12,095 INFO L482 AbstractCegarLoop]: Abstraction has 5367 states and 15778 transitions. [2021-07-13 19:18:12,095 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) [2021-07-13 19:18:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 15778 transitions. [2021-07-13 19:18:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:12,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:12,101 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:12,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2933 [2021-07-13 19:18:12,317 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1329958805, now seen corresponding path program 221 times [2021-07-13 19:18:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578664802] [2021-07-13 19:18:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:12,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578664802] [2021-07-13 19:18:12,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578664802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690506950] [2021-07-13 19:18:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:12,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:18:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:12,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:12,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690506950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:12,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:12,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297827210] [2021-07-13 19:18:12,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:12,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:12,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:12,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:12,426 INFO L87 Difference]: Start difference. First operand 5367 states and 15778 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) [2021-07-13 19:18:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:12,498 INFO L93 Difference]: Finished difference Result 5976 states and 16857 transitions. [2021-07-13 19:18:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:12,498 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 22 [2021-07-13 19:18:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:12,508 INFO L225 Difference]: With dead ends: 5976 [2021-07-13 19:18:12,508 INFO L226 Difference]: Without dead ends: 5976 [2021-07-13 19:18:12,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-07-13 19:18:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5368. [2021-07-13 19:18:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.9381404881684365) internal successors, (15769), 5367 states have internal predecessors, (15769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15769 transitions. [2021-07-13 19:18:12,585 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15769 transitions. Word has length 22 [2021-07-13 19:18:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:12,585 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15769 transitions. [2021-07-13 19:18:12,585 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) [2021-07-13 19:18:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15769 transitions. [2021-07-13 19:18:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:12,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:12,591 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:12,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2934,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:12,792 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:12,792 INFO L82 PathProgramCache]: Analyzing trace with hash -399088529, now seen corresponding path program 222 times [2021-07-13 19:18:12,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:12,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349964945] [2021-07-13 19:18:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:12,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:12,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349964945] [2021-07-13 19:18:12,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349964945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776859793] [2021-07-13 19:18:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:12,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:18:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:12,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:12,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776859793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:12,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:18:12,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691169033] [2021-07-13 19:18:12,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:12,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:12,911 INFO L87 Difference]: Start difference. First operand 5368 states and 15769 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) [2021-07-13 19:18:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:12,984 INFO L93 Difference]: Finished difference Result 5731 states and 16223 transitions. [2021-07-13 19:18:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:12,985 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 22 [2021-07-13 19:18:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:12,993 INFO L225 Difference]: With dead ends: 5731 [2021-07-13 19:18:12,993 INFO L226 Difference]: Without dead ends: 5731 [2021-07-13 19:18:12,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-07-13 19:18:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5320. [2021-07-13 19:18:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 2.9332581312276744) internal successors, (15602), 5319 states have internal predecessors, (15602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 15602 transitions. [2021-07-13 19:18:13,070 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 15602 transitions. Word has length 22 [2021-07-13 19:18:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:13,070 INFO L482 AbstractCegarLoop]: Abstraction has 5320 states and 15602 transitions. [2021-07-13 19:18:13,070 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) [2021-07-13 19:18:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 15602 transitions. [2021-07-13 19:18:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:13,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:13,076 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:13,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2935 [2021-07-13 19:18:13,292 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1835018965, now seen corresponding path program 223 times [2021-07-13 19:18:13,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:13,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905785436] [2021-07-13 19:18:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:13,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:13,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905785436] [2021-07-13 19:18:13,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905785436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:13,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019062019] [2021-07-13 19:18:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:13,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019062019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:13,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:13,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:18:13,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474977132] [2021-07-13 19:18:13,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:13,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:13,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:13,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:13,419 INFO L87 Difference]: Start difference. First operand 5320 states and 15602 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) [2021-07-13 19:18:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:13,526 INFO L93 Difference]: Finished difference Result 6238 states and 17516 transitions. [2021-07-13 19:18:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:13,526 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 22 [2021-07-13 19:18:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:13,536 INFO L225 Difference]: With dead ends: 6238 [2021-07-13 19:18:13,536 INFO L226 Difference]: Without dead ends: 6238 [2021-07-13 19:18:13,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-07-13 19:18:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5233. [2021-07-13 19:18:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.922400611620795) internal successors, (15290), 5232 states have internal predecessors, (15290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15290 transitions. [2021-07-13 19:18:13,621 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15290 transitions. Word has length 22 [2021-07-13 19:18:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:13,636 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 15290 transitions. [2021-07-13 19:18:13,637 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) [2021-07-13 19:18:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15290 transitions. [2021-07-13 19:18:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:13,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:13,644 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:13,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2936,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:13,868 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1922092753, now seen corresponding path program 224 times [2021-07-13 19:18:13,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:13,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541669772] [2021-07-13 19:18:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:13,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:13,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541669772] [2021-07-13 19:18:13,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541669772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:13,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824450291] [2021-07-13 19:18:13,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:13,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:13,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:13,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824450291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:13,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:13,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:18:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166481084] [2021-07-13 19:18:13,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:13,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:13,998 INFO L87 Difference]: Start difference. First operand 5233 states and 15290 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) [2021-07-13 19:18:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:14,154 INFO L93 Difference]: Finished difference Result 8227 states and 23267 transitions. [2021-07-13 19:18:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:14,155 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 22 [2021-07-13 19:18:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:14,169 INFO L225 Difference]: With dead ends: 8227 [2021-07-13 19:18:14,170 INFO L226 Difference]: Without dead ends: 8227 [2021-07-13 19:18:14,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-07-13 19:18:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6539. [2021-07-13 19:18:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 2.962220862649128) internal successors, (19367), 6538 states have internal predecessors, (19367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 19367 transitions. [2021-07-13 19:18:14,326 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 19367 transitions. Word has length 22 [2021-07-13 19:18:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:14,326 INFO L482 AbstractCegarLoop]: Abstraction has 6539 states and 19367 transitions. [2021-07-13 19:18:14,326 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) [2021-07-13 19:18:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 19367 transitions. [2021-07-13 19:18:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:14,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:14,335 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:14,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2937,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:14,535 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 971614503, now seen corresponding path program 225 times [2021-07-13 19:18:14,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:14,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030237091] [2021-07-13 19:18:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:14,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:14,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030237091] [2021-07-13 19:18:14,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030237091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:14,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672937430] [2021-07-13 19:18:14,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:14,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:18:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:14,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672937430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:14,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:14,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:14,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898242188] [2021-07-13 19:18:14,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:14,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:14,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:14,682 INFO L87 Difference]: Start difference. First operand 6539 states and 19367 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) [2021-07-13 19:18:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:14,828 INFO L93 Difference]: Finished difference Result 8105 states and 23072 transitions. [2021-07-13 19:18:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:14,828 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 22 [2021-07-13 19:18:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:14,842 INFO L225 Difference]: With dead ends: 8105 [2021-07-13 19:18:14,842 INFO L226 Difference]: Without dead ends: 8105 [2021-07-13 19:18:14,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-07-13 19:18:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 5159. [2021-07-13 19:18:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 2.929042264443583) internal successors, (15108), 5158 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15108 transitions. [2021-07-13 19:18:14,945 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15108 transitions. Word has length 22 [2021-07-13 19:18:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:14,945 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 15108 transitions. [2021-07-13 19:18:14,946 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) [2021-07-13 19:18:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15108 transitions. [2021-07-13 19:18:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:14,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:14,952 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:15,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:15,162 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:15,162 INFO L82 PathProgramCache]: Analyzing trace with hash -305915357, now seen corresponding path program 226 times [2021-07-13 19:18:15,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:15,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434523043] [2021-07-13 19:18:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:15,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:15,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434523043] [2021-07-13 19:18:15,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434523043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:15,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041505059] [2021-07-13 19:18:15,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:15,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:15,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:15,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041505059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:15,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:15,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:15,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711336883] [2021-07-13 19:18:15,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:15,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:15,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:15,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:15,256 INFO L87 Difference]: Start difference. First operand 5159 states and 15108 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) [2021-07-13 19:18:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:15,379 INFO L93 Difference]: Finished difference Result 5517 states and 15611 transitions. [2021-07-13 19:18:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:15,379 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 22 [2021-07-13 19:18:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:15,386 INFO L225 Difference]: With dead ends: 5517 [2021-07-13 19:18:15,387 INFO L226 Difference]: Without dead ends: 5513 [2021-07-13 19:18:15,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-07-13 19:18:15,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 5171. [2021-07-13 19:18:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 2.927852998065764) internal successors, (15137), 5170 states have internal predecessors, (15137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 15137 transitions. [2021-07-13 19:18:15,461 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 15137 transitions. Word has length 22 [2021-07-13 19:18:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:15,461 INFO L482 AbstractCegarLoop]: Abstraction has 5171 states and 15137 transitions. [2021-07-13 19:18:15,461 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) [2021-07-13 19:18:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 15137 transitions. [2021-07-13 19:18:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:15,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:15,467 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:15,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:15,682 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:15,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1411833703, now seen corresponding path program 227 times [2021-07-13 19:18:15,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:15,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552458105] [2021-07-13 19:18:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:15,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552458105] [2021-07-13 19:18:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552458105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623491884] [2021-07-13 19:18:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:15,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:18:15,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:15,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623491884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:15,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:15,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176841712] [2021-07-13 19:18:15,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:15,782 INFO L87 Difference]: Start difference. First operand 5171 states and 15137 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) [2021-07-13 19:18:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:15,856 INFO L93 Difference]: Finished difference Result 5892 states and 16526 transitions. [2021-07-13 19:18:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:15,856 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 22 [2021-07-13 19:18:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:15,864 INFO L225 Difference]: With dead ends: 5892 [2021-07-13 19:18:15,864 INFO L226 Difference]: Without dead ends: 5892 [2021-07-13 19:18:15,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-07-13 19:18:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5183. [2021-07-13 19:18:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 2.9260903126206097) internal successors, (15163), 5182 states have internal predecessors, (15163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15163 transitions. [2021-07-13 19:18:15,939 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15163 transitions. Word has length 22 [2021-07-13 19:18:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:15,939 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 15163 transitions. [2021-07-13 19:18:15,939 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) [2021-07-13 19:18:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15163 transitions. [2021-07-13 19:18:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:15,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:15,945 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:16,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2940 [2021-07-13 19:18:16,152 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash -317213631, now seen corresponding path program 228 times [2021-07-13 19:18:16,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:16,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586904226] [2021-07-13 19:18:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:16,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:16,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586904226] [2021-07-13 19:18:16,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586904226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:16,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963281699] [2021-07-13 19:18:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:16,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:18:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:16,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963281699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:16,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:16,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:16,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454617667] [2021-07-13 19:18:16,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:16,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:16,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:16,276 INFO L87 Difference]: Start difference. First operand 5183 states and 15163 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) [2021-07-13 19:18:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:16,363 INFO L93 Difference]: Finished difference Result 5922 states and 16620 transitions. [2021-07-13 19:18:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:16,364 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 22 [2021-07-13 19:18:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:16,373 INFO L225 Difference]: With dead ends: 5922 [2021-07-13 19:18:16,373 INFO L226 Difference]: Without dead ends: 5922 [2021-07-13 19:18:16,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-07-13 19:18:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5178. [2021-07-13 19:18:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.924666795441375) internal successors, (15141), 5177 states have internal predecessors, (15141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15141 transitions. [2021-07-13 19:18:16,458 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15141 transitions. Word has length 22 [2021-07-13 19:18:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:16,458 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 15141 transitions. [2021-07-13 19:18:16,458 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) [2021-07-13 19:18:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15141 transitions. [2021-07-13 19:18:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:16,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:16,465 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:16,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-07-13 19:18:16,681 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1916893863, now seen corresponding path program 229 times [2021-07-13 19:18:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:16,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466866286] [2021-07-13 19:18:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:16,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:16,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466866286] [2021-07-13 19:18:16,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466866286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:16,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388954944] [2021-07-13 19:18:16,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388954944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:16,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:16,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445833844] [2021-07-13 19:18:16,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:16,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:16,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:16,798 INFO L87 Difference]: Start difference. First operand 5178 states and 15141 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) [2021-07-13 19:18:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:16,885 INFO L93 Difference]: Finished difference Result 8667 states and 25108 transitions. [2021-07-13 19:18:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:16,885 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 22 [2021-07-13 19:18:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:16,899 INFO L225 Difference]: With dead ends: 8667 [2021-07-13 19:18:16,899 INFO L226 Difference]: Without dead ends: 8667 [2021-07-13 19:18:16,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-07-13 19:18:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8167. [2021-07-13 19:18:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 8166 states have (on average 2.984570168993387) internal successors, (24372), 8166 states have internal predecessors, (24372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 24372 transitions. [2021-07-13 19:18:17,040 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 24372 transitions. Word has length 22 [2021-07-13 19:18:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:17,040 INFO L482 AbstractCegarLoop]: Abstraction has 8167 states and 24372 transitions. [2021-07-13 19:18:17,040 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) [2021-07-13 19:18:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 24372 transitions. [2021-07-13 19:18:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:17,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:17,050 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:17,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2942 [2021-07-13 19:18:17,250 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:17,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1840217855, now seen corresponding path program 230 times [2021-07-13 19:18:17,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:17,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521352174] [2021-07-13 19:18:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:17,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521352174] [2021-07-13 19:18:17,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521352174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230642159] [2021-07-13 19:18:17,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:17,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:17,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230642159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:17,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595300692] [2021-07-13 19:18:17,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:17,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:17,392 INFO L87 Difference]: Start difference. First operand 8167 states and 24372 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) [2021-07-13 19:18:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:17,526 INFO L93 Difference]: Finished difference Result 9066 states and 26143 transitions. [2021-07-13 19:18:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:17,527 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 22 [2021-07-13 19:18:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:17,543 INFO L225 Difference]: With dead ends: 9066 [2021-07-13 19:18:17,543 INFO L226 Difference]: Without dead ends: 9066 [2021-07-13 19:18:17,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-07-13 19:18:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8041. [2021-07-13 19:18:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 2.981218905472637) internal successors, (23969), 8040 states have internal predecessors, (23969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 23969 transitions. [2021-07-13 19:18:17,691 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 23969 transitions. Word has length 22 [2021-07-13 19:18:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:17,691 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 23969 transitions. [2021-07-13 19:18:17,691 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) [2021-07-13 19:18:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 23969 transitions. [2021-07-13 19:18:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:17,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:17,700 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2943,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:17,916 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:17,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1948403175, now seen corresponding path program 231 times [2021-07-13 19:18:17,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:17,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397552825] [2021-07-13 19:18:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:17,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:17,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397552825] [2021-07-13 19:18:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397552825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620368814] [2021-07-13 19:18:17,979 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 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 [2021-07-13 19:18:18,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:18:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:18,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620368814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:18,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:18,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82621352] [2021-07-13 19:18:18,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:18,043 INFO L87 Difference]: Start difference. First operand 8041 states and 23969 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) [2021-07-13 19:18:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:18,309 INFO L93 Difference]: Finished difference Result 12727 states and 37454 transitions. [2021-07-13 19:18:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:18,310 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 22 [2021-07-13 19:18:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:18,332 INFO L225 Difference]: With dead ends: 12727 [2021-07-13 19:18:18,332 INFO L226 Difference]: Without dead ends: 12727 [2021-07-13 19:18:18,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:18:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12727 states. [2021-07-13 19:18:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12727 to 11269. [2021-07-13 19:18:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 3.0277777777777777) internal successors, (34117), 11268 states have internal predecessors, (34117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 34117 transitions. [2021-07-13 19:18:18,523 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 34117 transitions. Word has length 22 [2021-07-13 19:18:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:18,524 INFO L482 AbstractCegarLoop]: Abstraction has 11269 states and 34117 transitions. [2021-07-13 19:18:18,524 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) [2021-07-13 19:18:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 34117 transitions. [2021-07-13 19:18:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:18,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:18,536 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:18,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2944 [2021-07-13 19:18:18,749 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2063972437, now seen corresponding path program 232 times [2021-07-13 19:18:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:18,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781373302] [2021-07-13 19:18:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:18,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:18,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781373302] [2021-07-13 19:18:18,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781373302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223174149] [2021-07-13 19:18:18,802 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 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 [2021-07-13 19:18:18,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:18,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:18,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223174149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:18,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:18,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964464668] [2021-07-13 19:18:18,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:18,864 INFO L87 Difference]: Start difference. First operand 11269 states and 34117 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) [2021-07-13 19:18:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:18,966 INFO L93 Difference]: Finished difference Result 11783 states and 35094 transitions. [2021-07-13 19:18:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:18,966 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 22 [2021-07-13 19:18:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:18,989 INFO L225 Difference]: With dead ends: 11783 [2021-07-13 19:18:18,989 INFO L226 Difference]: Without dead ends: 11783 [2021-07-13 19:18:18,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-07-13 19:18:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 11255. [2021-07-13 19:18:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 3.027368046916652) internal successors, (34070), 11254 states have internal predecessors, (34070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 34070 transitions. [2021-07-13 19:18:19,186 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 34070 transitions. Word has length 22 [2021-07-13 19:18:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:19,186 INFO L482 AbstractCegarLoop]: Abstraction has 11255 states and 34070 transitions. [2021-07-13 19:18:19,186 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) [2021-07-13 19:18:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 34070 transitions. [2021-07-13 19:18:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:19,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:19,198 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:19,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2945,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:19,414 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1693139281, now seen corresponding path program 233 times [2021-07-13 19:18:19,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:19,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109885911] [2021-07-13 19:18:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:19,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:19,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109885911] [2021-07-13 19:18:19,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109885911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:19,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887831080] [2021-07-13 19:18:19,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:19,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:18:19,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:19,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:19,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887831080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:19,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:19,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:19,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935284408] [2021-07-13 19:18:19,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:19,537 INFO L87 Difference]: Start difference. First operand 11255 states and 34070 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) [2021-07-13 19:18:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:19,685 INFO L93 Difference]: Finished difference Result 12824 states and 38032 transitions. [2021-07-13 19:18:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:19,685 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 22 [2021-07-13 19:18:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:19,712 INFO L225 Difference]: With dead ends: 12824 [2021-07-13 19:18:19,712 INFO L226 Difference]: Without dead ends: 12824 [2021-07-13 19:18:19,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-07-13 19:18:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7201. [2021-07-13 19:18:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.9608333333333334) internal successors, (21318), 7200 states have internal predecessors, (21318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21318 transitions. [2021-07-13 19:18:19,893 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21318 transitions. Word has length 22 [2021-07-13 19:18:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:19,893 INFO L482 AbstractCegarLoop]: Abstraction has 7201 states and 21318 transitions. [2021-07-13 19:18:19,893 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) [2021-07-13 19:18:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21318 transitions. [2021-07-13 19:18:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:19,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:19,902 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:20,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-07-13 19:18:20,118 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2095481749, now seen corresponding path program 234 times [2021-07-13 19:18:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:20,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544670903] [2021-07-13 19:18:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:20,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544670903] [2021-07-13 19:18:20,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544670903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:20,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239130789] [2021-07-13 19:18:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:20,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:20,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239130789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:20,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:20,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160644344] [2021-07-13 19:18:20,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:20,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:20,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:20,243 INFO L87 Difference]: Start difference. First operand 7201 states and 21318 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) [2021-07-13 19:18:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:20,429 INFO L93 Difference]: Finished difference Result 10561 states and 30382 transitions. [2021-07-13 19:18:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:20,430 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 22 [2021-07-13 19:18:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:20,448 INFO L225 Difference]: With dead ends: 10561 [2021-07-13 19:18:20,448 INFO L226 Difference]: Without dead ends: 10561 [2021-07-13 19:18:20,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:18:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-07-13 19:18:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 6109. [2021-07-13 19:18:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.947282252783235) internal successors, (18002), 6108 states have internal predecessors, (18002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 18002 transitions. [2021-07-13 19:18:20,578 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 18002 transitions. Word has length 22 [2021-07-13 19:18:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:20,578 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 18002 transitions. [2021-07-13 19:18:20,578 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) [2021-07-13 19:18:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 18002 transitions. [2021-07-13 19:18:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:20,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:20,585 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:20,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2947,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:20,800 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1959701393, now seen corresponding path program 235 times [2021-07-13 19:18:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:20,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918512140] [2021-07-13 19:18:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:20,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:20,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918512140] [2021-07-13 19:18:20,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918512140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:20,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859578178] [2021-07-13 19:18:20,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:20,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859578178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:20,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:20,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:20,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949550766] [2021-07-13 19:18:20,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:20,914 INFO L87 Difference]: Start difference. First operand 6109 states and 18002 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) [2021-07-13 19:18:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:21,052 INFO L93 Difference]: Finished difference Result 6375 states and 18328 transitions. [2021-07-13 19:18:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:21,052 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 22 [2021-07-13 19:18:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:21,062 INFO L225 Difference]: With dead ends: 6375 [2021-07-13 19:18:21,062 INFO L226 Difference]: Without dead ends: 6371 [2021-07-13 19:18:21,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2021-07-13 19:18:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6109. [2021-07-13 19:18:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.9466273739358217) internal successors, (17998), 6108 states have internal predecessors, (17998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 17998 transitions. [2021-07-13 19:18:21,153 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 17998 transitions. Word has length 22 [2021-07-13 19:18:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:21,153 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 17998 transitions. [2021-07-13 19:18:21,153 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) [2021-07-13 19:18:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 17998 transitions. [2021-07-13 19:18:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:21,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:21,160 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:21,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:21,362 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1459014895, now seen corresponding path program 236 times [2021-07-13 19:18:21,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:21,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287187175] [2021-07-13 19:18:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:21,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:21,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287187175] [2021-07-13 19:18:21,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287187175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:21,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097314713] [2021-07-13 19:18:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:21,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:21,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:21,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097314713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:21,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:21,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:18:21,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058404710] [2021-07-13 19:18:21,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:21,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:21,498 INFO L87 Difference]: Start difference. First operand 6109 states and 17998 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:21,661 INFO L93 Difference]: Finished difference Result 7567 states and 21448 transitions. [2021-07-13 19:18:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:21,675 INFO L225 Difference]: With dead ends: 7567 [2021-07-13 19:18:21,675 INFO L226 Difference]: Without dead ends: 7567 [2021-07-13 19:18:21,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:18:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2021-07-13 19:18:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 4949. [2021-07-13 19:18:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.927445432497979) internal successors, (14485), 4948 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14485 transitions. [2021-07-13 19:18:21,821 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14485 transitions. Word has length 22 [2021-07-13 19:18:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:21,821 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14485 transitions. [2021-07-13 19:18:21,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14485 transitions. [2021-07-13 19:18:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:21,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:21,827 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:22,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2949,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:22,041 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2062760815, now seen corresponding path program 237 times [2021-07-13 19:18:22,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:22,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802235258] [2021-07-13 19:18:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:22,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:22,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802235258] [2021-07-13 19:18:22,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802235258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679079088] [2021-07-13 19:18:22,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:22,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:18:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679079088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:22,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611233509] [2021-07-13 19:18:22,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:22,146 INFO L87 Difference]: Start difference. First operand 4949 states and 14485 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) [2021-07-13 19:18:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:22,284 INFO L93 Difference]: Finished difference Result 5274 states and 14931 transitions. [2021-07-13 19:18:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:22,285 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 22 [2021-07-13 19:18:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:22,293 INFO L225 Difference]: With dead ends: 5274 [2021-07-13 19:18:22,293 INFO L226 Difference]: Without dead ends: 5270 [2021-07-13 19:18:22,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-07-13 19:18:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4961. [2021-07-13 19:18:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.926209677419355) internal successors, (14514), 4960 states have internal predecessors, (14514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 14514 transitions. [2021-07-13 19:18:22,372 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 14514 transitions. Word has length 22 [2021-07-13 19:18:22,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:22,372 INFO L482 AbstractCegarLoop]: Abstraction has 4961 states and 14514 transitions. [2021-07-13 19:18:22,372 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) [2021-07-13 19:18:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 14514 transitions. [2021-07-13 19:18:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:22,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:22,378 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:22,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-07-13 19:18:22,593 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash -345011755, now seen corresponding path program 238 times [2021-07-13 19:18:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:22,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506288838] [2021-07-13 19:18:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:22,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:22,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506288838] [2021-07-13 19:18:22,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506288838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026129644] [2021-07-13 19:18:22,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:22,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026129644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:22,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163476525] [2021-07-13 19:18:22,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:22,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:22,739 INFO L87 Difference]: Start difference. First operand 4961 states and 14514 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) [2021-07-13 19:18:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:22,841 INFO L93 Difference]: Finished difference Result 5690 states and 15948 transitions. [2021-07-13 19:18:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:22,842 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 22 [2021-07-13 19:18:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:22,851 INFO L225 Difference]: With dead ends: 5690 [2021-07-13 19:18:22,851 INFO L226 Difference]: Without dead ends: 5690 [2021-07-13 19:18:22,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-07-13 19:18:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4969. [2021-07-13 19:18:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 2.9253220611916264) internal successors, (14533), 4968 states have internal predecessors, (14533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 14533 transitions. [2021-07-13 19:18:22,929 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 14533 transitions. Word has length 22 [2021-07-13 19:18:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:22,929 INFO L482 AbstractCegarLoop]: Abstraction has 4969 states and 14533 transitions. [2021-07-13 19:18:22,929 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) [2021-07-13 19:18:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 14533 transitions. [2021-07-13 19:18:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:22,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:22,935 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:23,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2951 [2021-07-13 19:18:23,151 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:23,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2074059089, now seen corresponding path program 239 times [2021-07-13 19:18:23,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:23,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295551693] [2021-07-13 19:18:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:23,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295551693] [2021-07-13 19:18:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295551693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:23,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553031458] [2021-07-13 19:18:23,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:23,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:18:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:23,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553031458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:23,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:23,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:18:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601021634] [2021-07-13 19:18:23,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:23,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:23,261 INFO L87 Difference]: Start difference. First operand 4969 states and 14533 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) [2021-07-13 19:18:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:23,385 INFO L93 Difference]: Finished difference Result 5878 states and 16463 transitions. [2021-07-13 19:18:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:23,386 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 22 [2021-07-13 19:18:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:23,394 INFO L225 Difference]: With dead ends: 5878 [2021-07-13 19:18:23,394 INFO L226 Difference]: Without dead ends: 5878 [2021-07-13 19:18:23,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-07-13 19:18:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4973. [2021-07-13 19:18:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4972 states have (on average 2.924979887369268) internal successors, (14543), 4972 states have internal predecessors, (14543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 14543 transitions. [2021-07-13 19:18:23,470 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 14543 transitions. Word has length 22 [2021-07-13 19:18:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:23,470 INFO L482 AbstractCegarLoop]: Abstraction has 4973 states and 14543 transitions. [2021-07-13 19:18:23,470 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) [2021-07-13 19:18:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 14543 transitions. [2021-07-13 19:18:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:23,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:23,476 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:23,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:23,691 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash 160048405, now seen corresponding path program 240 times [2021-07-13 19:18:23,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:23,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677865752] [2021-07-13 19:18:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677865752] [2021-07-13 19:18:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677865752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663388743] [2021-07-13 19:18:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:23,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:23,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:23,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663388743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:23,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:23,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:18:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764285256] [2021-07-13 19:18:23,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:23,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:23,823 INFO L87 Difference]: Start difference. First operand 4973 states and 14543 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) [2021-07-13 19:18:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:23,922 INFO L93 Difference]: Finished difference Result 5765 states and 16200 transitions. [2021-07-13 19:18:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:23,922 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 22 [2021-07-13 19:18:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:23,930 INFO L225 Difference]: With dead ends: 5765 [2021-07-13 19:18:23,931 INFO L226 Difference]: Without dead ends: 5765 [2021-07-13 19:18:23,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-07-13 19:18:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4919. [2021-07-13 19:18:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.9217161447742983) internal successors, (14369), 4918 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 14369 transitions. [2021-07-13 19:18:24,003 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 14369 transitions. Word has length 22 [2021-07-13 19:18:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:24,004 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 14369 transitions. [2021-07-13 19:18:24,004 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) [2021-07-13 19:18:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 14369 transitions. [2021-07-13 19:18:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:24,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:24,009 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:24,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:24,225 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash 697903983, now seen corresponding path program 241 times [2021-07-13 19:18:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:24,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072124984] [2021-07-13 19:18:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:24,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:24,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072124984] [2021-07-13 19:18:24,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072124984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842250488] [2021-07-13 19:18:24,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842250488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:24,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:18:24,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022897432] [2021-07-13 19:18:24,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:24,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:24,367 INFO L87 Difference]: Start difference. First operand 4919 states and 14369 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) [2021-07-13 19:18:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:24,469 INFO L93 Difference]: Finished difference Result 8014 states and 23033 transitions. [2021-07-13 19:18:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:24,469 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 22 [2021-07-13 19:18:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:24,481 INFO L225 Difference]: With dead ends: 8014 [2021-07-13 19:18:24,482 INFO L226 Difference]: Without dead ends: 8014 [2021-07-13 19:18:24,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-07-13 19:18:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7160. [2021-07-13 19:18:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 7159 states have (on average 2.966894817711971) internal successors, (21240), 7159 states have internal predecessors, (21240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 21240 transitions. [2021-07-13 19:18:24,592 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 21240 transitions. Word has length 22 [2021-07-13 19:18:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:24,592 INFO L482 AbstractCegarLoop]: Abstraction has 7160 states and 21240 transitions. [2021-07-13 19:18:24,592 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) [2021-07-13 19:18:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 21240 transitions. [2021-07-13 19:18:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:24,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:24,601 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:24,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2954 [2021-07-13 19:18:24,816 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:24,816 INFO L82 PathProgramCache]: Analyzing trace with hash 191557717, now seen corresponding path program 242 times [2021-07-13 19:18:24,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:24,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180946824] [2021-07-13 19:18:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:24,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:24,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180946824] [2021-07-13 19:18:24,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180946824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8212572] [2021-07-13 19:18:24,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:24,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:24,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8212572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:24,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:18:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460574278] [2021-07-13 19:18:24,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:24,941 INFO L87 Difference]: Start difference. First operand 7160 states and 21240 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:25,108 INFO L93 Difference]: Finished difference Result 8322 states and 23810 transitions. [2021-07-13 19:18:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:25,123 INFO L225 Difference]: With dead ends: 8322 [2021-07-13 19:18:25,123 INFO L226 Difference]: Without dead ends: 8322 [2021-07-13 19:18:25,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:18:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2021-07-13 19:18:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7016. [2021-07-13 19:18:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 2.9642195295794727) internal successors, (20794), 7015 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 20794 transitions. [2021-07-13 19:18:25,247 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 20794 transitions. Word has length 22 [2021-07-13 19:18:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:25,247 INFO L482 AbstractCegarLoop]: Abstraction has 7016 states and 20794 transitions. [2021-07-13 19:18:25,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 20794 transitions. [2021-07-13 19:18:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:25,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:25,256 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:25,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2955,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:25,472 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1674692655, now seen corresponding path program 243 times [2021-07-13 19:18:25,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:25,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56832614] [2021-07-13 19:18:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:25,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56832614] [2021-07-13 19:18:25,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56832614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032021953] [2021-07-13 19:18:25,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:18:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:25,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032021953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:25,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:25,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:18:25,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326482590] [2021-07-13 19:18:25,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:25,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:25,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:25,612 INFO L87 Difference]: Start difference. First operand 7016 states and 20794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:25,853 INFO L93 Difference]: Finished difference Result 10804 states and 31397 transitions. [2021-07-13 19:18:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:18:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:25,872 INFO L225 Difference]: With dead ends: 10804 [2021-07-13 19:18:25,872 INFO L226 Difference]: Without dead ends: 10804 [2021-07-13 19:18:25,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:18:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-07-13 19:18:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8931. [2021-07-13 19:18:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 8930 states have (on average 3.0094064949608064) internal successors, (26874), 8930 states have internal predecessors, (26874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 26874 transitions. [2021-07-13 19:18:26,081 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 26874 transitions. Word has length 22 [2021-07-13 19:18:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:26,081 INFO L482 AbstractCegarLoop]: Abstraction has 8931 states and 26874 transitions. [2021-07-13 19:18:26,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 26874 transitions. [2021-07-13 19:18:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:26,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:26,091 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:26,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-07-13 19:18:26,307 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:26,307 INFO L82 PathProgramCache]: Analyzing trace with hash 962372481, now seen corresponding path program 244 times [2021-07-13 19:18:26,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:26,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771307046] [2021-07-13 19:18:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:26,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771307046] [2021-07-13 19:18:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771307046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734607642] [2021-07-13 19:18:26,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:26,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:26,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:26,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:26,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734607642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:26,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:26,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:26,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791592172] [2021-07-13 19:18:26,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:26,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:26,427 INFO L87 Difference]: Start difference. First operand 8931 states and 26874 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) [2021-07-13 19:18:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:26,531 INFO L93 Difference]: Finished difference Result 9250 states and 27288 transitions. [2021-07-13 19:18:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:26,532 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 22 [2021-07-13 19:18:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:26,548 INFO L225 Difference]: With dead ends: 9250 [2021-07-13 19:18:26,548 INFO L226 Difference]: Without dead ends: 9249 [2021-07-13 19:18:26,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:26,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-07-13 19:18:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 8667. [2021-07-13 19:18:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8667 states, 8666 states have (on average 3.0012693284098777) internal successors, (26009), 8666 states have internal predecessors, (26009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 26009 transitions. [2021-07-13 19:18:26,721 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 26009 transitions. Word has length 22 [2021-07-13 19:18:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:26,721 INFO L482 AbstractCegarLoop]: Abstraction has 8667 states and 26009 transitions. [2021-07-13 19:18:26,721 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) [2021-07-13 19:18:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 26009 transitions. [2021-07-13 19:18:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:26,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:26,731 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:26,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2957,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:26,945 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash 456026215, now seen corresponding path program 245 times [2021-07-13 19:18:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:26,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346497762] [2021-07-13 19:18:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:27,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346497762] [2021-07-13 19:18:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346497762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392546655] [2021-07-13 19:18:27,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:27,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:27,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392546655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:27,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:27,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:27,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219482838] [2021-07-13 19:18:27,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:27,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:27,072 INFO L87 Difference]: Start difference. First operand 8667 states and 26009 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:27,218 INFO L93 Difference]: Finished difference Result 9868 states and 29015 transitions. [2021-07-13 19:18:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:27,237 INFO L225 Difference]: With dead ends: 9868 [2021-07-13 19:18:27,238 INFO L226 Difference]: Without dead ends: 9868 [2021-07-13 19:18:27,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:18:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-07-13 19:18:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 6055. [2021-07-13 19:18:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 2.9398744631648497) internal successors, (17798), 6054 states have internal predecessors, (17798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 17798 transitions. [2021-07-13 19:18:27,373 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 17798 transitions. Word has length 22 [2021-07-13 19:18:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:27,373 INFO L482 AbstractCegarLoop]: Abstraction has 6055 states and 17798 transitions. [2021-07-13 19:18:27,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 17798 transitions. [2021-07-13 19:18:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:27,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:27,380 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:27,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2958,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:27,593 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:27,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1939161153, now seen corresponding path program 246 times [2021-07-13 19:18:27,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:27,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489851353] [2021-07-13 19:18:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:27,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489851353] [2021-07-13 19:18:27,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489851353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558426611] [2021-07-13 19:18:27,660 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 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 [2021-07-13 19:18:27,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:18:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:27,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558426611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:27,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:27,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:27,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171100746] [2021-07-13 19:18:27,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:27,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:27,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:27,722 INFO L87 Difference]: Start difference. First operand 6055 states and 17798 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:27,949 INFO L93 Difference]: Finished difference Result 8378 states and 23833 transitions. [2021-07-13 19:18:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:27,965 INFO L225 Difference]: With dead ends: 8378 [2021-07-13 19:18:27,966 INFO L226 Difference]: Without dead ends: 8378 [2021-07-13 19:18:27,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:18:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-07-13 19:18:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 4616. [2021-07-13 19:18:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9371614301191764) internal successors, (13555), 4615 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13555 transitions. [2021-07-13 19:18:28,072 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13555 transitions. Word has length 22 [2021-07-13 19:18:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:28,072 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13555 transitions. [2021-07-13 19:18:28,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13555 transitions. [2021-07-13 19:18:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:28,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:28,077 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:28,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2959,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:28,285 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -611442137, now seen corresponding path program 247 times [2021-07-13 19:18:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669802136] [2021-07-13 19:18:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:28,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:28,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669802136] [2021-07-13 19:18:28,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669802136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:28,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436970102] [2021-07-13 19:18:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:28,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436970102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:28,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:28,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724392645] [2021-07-13 19:18:28,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:28,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:28,423 INFO L87 Difference]: Start difference. First operand 4616 states and 13555 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:28,628 INFO L93 Difference]: Finished difference Result 7421 states and 21200 transitions. [2021-07-13 19:18:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:28,641 INFO L225 Difference]: With dead ends: 7421 [2021-07-13 19:18:28,641 INFO L226 Difference]: Without dead ends: 7421 [2021-07-13 19:18:28,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:18:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-07-13 19:18:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 6529. [2021-07-13 19:18:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 2.9543504901960786) internal successors, (19286), 6528 states have internal predecessors, (19286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 19286 transitions. [2021-07-13 19:18:28,762 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 19286 transitions. Word has length 22 [2021-07-13 19:18:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:28,762 INFO L482 AbstractCegarLoop]: Abstraction has 6529 states and 19286 transitions. [2021-07-13 19:18:28,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 19286 transitions. [2021-07-13 19:18:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:28,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:28,770 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:28,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2960 [2021-07-13 19:18:28,973 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash -690395165, now seen corresponding path program 248 times [2021-07-13 19:18:28,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:28,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006950868] [2021-07-13 19:18:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:29,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:29,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006950868] [2021-07-13 19:18:29,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006950868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75997911] [2021-07-13 19:18:29,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:29,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:29,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:29,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75997911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:29,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:29,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635568148] [2021-07-13 19:18:29,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:29,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:29,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:29,069 INFO L87 Difference]: Start difference. First operand 6529 states and 19286 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) [2021-07-13 19:18:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:29,199 INFO L93 Difference]: Finished difference Result 6802 states and 19658 transitions. [2021-07-13 19:18:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:29,199 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 22 [2021-07-13 19:18:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:29,209 INFO L225 Difference]: With dead ends: 6802 [2021-07-13 19:18:29,209 INFO L226 Difference]: Without dead ends: 6798 [2021-07-13 19:18:29,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-07-13 19:18:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6498. [2021-07-13 19:18:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 2.950592581191319) internal successors, (19170), 6497 states have internal predecessors, (19170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 19170 transitions. [2021-07-13 19:18:29,312 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 19170 transitions. Word has length 22 [2021-07-13 19:18:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:29,313 INFO L482 AbstractCegarLoop]: Abstraction has 6498 states and 19170 transitions. [2021-07-13 19:18:29,313 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) [2021-07-13 19:18:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 19170 transitions. [2021-07-13 19:18:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:29,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:29,320 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:29,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2961 [2021-07-13 19:18:29,535 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1027353895, now seen corresponding path program 249 times [2021-07-13 19:18:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:29,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918931075] [2021-07-13 19:18:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:29,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918931075] [2021-07-13 19:18:29,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918931075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713398490] [2021-07-13 19:18:29,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:29,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:29,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:29,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713398490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:29,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358768916] [2021-07-13 19:18:29,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:29,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:29,637 INFO L87 Difference]: Start difference. First operand 6498 states and 19170 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) [2021-07-13 19:18:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:29,730 INFO L93 Difference]: Finished difference Result 7322 states and 20998 transitions. [2021-07-13 19:18:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:29,730 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 22 [2021-07-13 19:18:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:29,742 INFO L225 Difference]: With dead ends: 7322 [2021-07-13 19:18:29,742 INFO L226 Difference]: Without dead ends: 7322 [2021-07-13 19:18:29,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-07-13 19:18:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6505. [2021-07-13 19:18:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.950030750307503) internal successors, (19187), 6504 states have internal predecessors, (19187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 19187 transitions. [2021-07-13 19:18:29,907 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 19187 transitions. Word has length 22 [2021-07-13 19:18:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:29,907 INFO L482 AbstractCegarLoop]: Abstraction has 6505 states and 19187 transitions. [2021-07-13 19:18:29,907 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) [2021-07-13 19:18:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 19187 transitions. [2021-07-13 19:18:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:29,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:29,914 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:30,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-07-13 19:18:30,129 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:30,130 INFO L82 PathProgramCache]: Analyzing trace with hash -701693439, now seen corresponding path program 250 times [2021-07-13 19:18:30,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:30,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147672770] [2021-07-13 19:18:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:30,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:30,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147672770] [2021-07-13 19:18:30,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147672770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936392865] [2021-07-13 19:18:30,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:30,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:30,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:30,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936392865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:30,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:30,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840071255] [2021-07-13 19:18:30,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:30,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:30,236 INFO L87 Difference]: Start difference. First operand 6505 states and 19187 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) [2021-07-13 19:18:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:30,350 INFO L93 Difference]: Finished difference Result 7657 states and 21924 transitions. [2021-07-13 19:18:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:30,350 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 22 [2021-07-13 19:18:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:30,361 INFO L225 Difference]: With dead ends: 7657 [2021-07-13 19:18:30,362 INFO L226 Difference]: Without dead ends: 7657 [2021-07-13 19:18:30,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-07-13 19:18:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 6280. [2021-07-13 19:18:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 2.94186972447842) internal successors, (18472), 6279 states have internal predecessors, (18472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 18472 transitions. [2021-07-13 19:18:30,467 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 18472 transitions. Word has length 22 [2021-07-13 19:18:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:30,467 INFO L482 AbstractCegarLoop]: Abstraction has 6280 states and 18472 transitions. [2021-07-13 19:18:30,467 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) [2021-07-13 19:18:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 18472 transitions. [2021-07-13 19:18:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:30,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:30,474 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:30,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2963 [2021-07-13 19:18:30,689 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:30,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1532414055, now seen corresponding path program 251 times [2021-07-13 19:18:30,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:30,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809395867] [2021-07-13 19:18:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:30,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:30,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809395867] [2021-07-13 19:18:30,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809395867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550483935] [2021-07-13 19:18:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:30,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:18:30,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:30,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550483935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:30,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:30,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742081719] [2021-07-13 19:18:30,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:30,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:30,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:30,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:30,798 INFO L87 Difference]: Start difference. First operand 6280 states and 18472 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) [2021-07-13 19:18:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:30,921 INFO L93 Difference]: Finished difference Result 8774 states and 25325 transitions. [2021-07-13 19:18:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:30,921 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 22 [2021-07-13 19:18:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:30,936 INFO L225 Difference]: With dead ends: 8774 [2021-07-13 19:18:30,936 INFO L226 Difference]: Without dead ends: 8774 [2021-07-13 19:18:30,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-07-13 19:18:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7854. [2021-07-13 19:18:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 2.9848465554565133) internal successors, (23440), 7853 states have internal predecessors, (23440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 23440 transitions. [2021-07-13 19:18:31,071 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 23440 transitions. Word has length 22 [2021-07-13 19:18:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:31,072 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 23440 transitions. [2021-07-13 19:18:31,072 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) [2021-07-13 19:18:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 23440 transitions. [2021-07-13 19:18:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:31,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:31,081 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:31,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-07-13 19:18:31,296 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2070269633, now seen corresponding path program 252 times [2021-07-13 19:18:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959445129] [2021-07-13 19:18:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:31,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:31,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959445129] [2021-07-13 19:18:31,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959445129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:31,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125889011] [2021-07-13 19:18:31,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:31,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:18:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125889011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:31,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:31,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:31,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061468895] [2021-07-13 19:18:31,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:31,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:31,411 INFO L87 Difference]: Start difference. First operand 7854 states and 23440 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) [2021-07-13 19:18:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:31,562 INFO L93 Difference]: Finished difference Result 8525 states and 24660 transitions. [2021-07-13 19:18:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:31,567 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 22 [2021-07-13 19:18:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:31,584 INFO L225 Difference]: With dead ends: 8525 [2021-07-13 19:18:31,584 INFO L226 Difference]: Without dead ends: 8525 [2021-07-13 19:18:31,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-07-13 19:18:31,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7170. [2021-07-13 19:18:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 2.9768447482215095) internal successors, (21341), 7169 states have internal predecessors, (21341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21341 transitions. [2021-07-13 19:18:31,731 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21341 transitions. Word has length 22 [2021-07-13 19:18:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:31,731 INFO L482 AbstractCegarLoop]: Abstraction has 7170 states and 21341 transitions. [2021-07-13 19:18:31,731 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) [2021-07-13 19:18:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21341 transitions. [2021-07-13 19:18:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:31,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:31,740 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:31,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:31,957 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1563923367, now seen corresponding path program 253 times [2021-07-13 19:18:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:31,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920902122] [2021-07-13 19:18:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:32,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:32,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920902122] [2021-07-13 19:18:32,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920902122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897099915] [2021-07-13 19:18:32,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897099915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:32,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470954763] [2021-07-13 19:18:32,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:32,089 INFO L87 Difference]: Start difference. First operand 7170 states and 21341 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) [2021-07-13 19:18:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:32,202 INFO L93 Difference]: Finished difference Result 10318 states and 30338 transitions. [2021-07-13 19:18:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:32,203 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 22 [2021-07-13 19:18:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:32,220 INFO L225 Difference]: With dead ends: 10318 [2021-07-13 19:18:32,220 INFO L226 Difference]: Without dead ends: 10318 [2021-07-13 19:18:32,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-07-13 19:18:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 9947. [2021-07-13 19:18:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 2.995475568067565) internal successors, (29793), 9946 states have internal predecessors, (29793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 29793 transitions. [2021-07-13 19:18:32,384 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 29793 transitions. Word has length 22 [2021-07-13 19:18:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:32,384 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 29793 transitions. [2021-07-13 19:18:32,384 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) [2021-07-13 19:18:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 29793 transitions. [2021-07-13 19:18:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:32,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:32,395 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:32,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:32,609 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1247908991, now seen corresponding path program 254 times [2021-07-13 19:18:32,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:32,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147089311] [2021-07-13 19:18:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:32,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:32,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147089311] [2021-07-13 19:18:32,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147089311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869477168] [2021-07-13 19:18:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:32,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:32,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869477168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:32,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515612443] [2021-07-13 19:18:32,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:32,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:32,755 INFO L87 Difference]: Start difference. First operand 9947 states and 29793 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:32,956 INFO L93 Difference]: Finished difference Result 10463 states and 30703 transitions. [2021-07-13 19:18:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:32,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:32,975 INFO L225 Difference]: With dead ends: 10463 [2021-07-13 19:18:32,975 INFO L226 Difference]: Without dead ends: 10463 [2021-07-13 19:18:32,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:18:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-07-13 19:18:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9768. [2021-07-13 19:18:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9768 states, 9767 states have (on average 2.995392648715061) internal successors, (29256), 9767 states have internal predecessors, (29256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9768 states to 9768 states and 29256 transitions. [2021-07-13 19:18:33,151 INFO L78 Accepts]: Start accepts. Automaton has 9768 states and 29256 transitions. Word has length 22 [2021-07-13 19:18:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:33,151 INFO L482 AbstractCegarLoop]: Abstraction has 9768 states and 29256 transitions. [2021-07-13 19:18:33,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 9768 states and 29256 transitions. [2021-07-13 19:18:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:33,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:33,162 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:33,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:33,377 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1779601127, now seen corresponding path program 255 times [2021-07-13 19:18:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:33,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978085443] [2021-07-13 19:18:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:33,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:33,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978085443] [2021-07-13 19:18:33,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978085443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:33,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007606687] [2021-07-13 19:18:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:33,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:33,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:33,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:33,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:33,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007606687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:33,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:33,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:33,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278476529] [2021-07-13 19:18:33,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:33,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:33,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:33,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:33,536 INFO L87 Difference]: Start difference. First operand 9768 states and 29256 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:33,819 INFO L93 Difference]: Finished difference Result 11837 states and 34803 transitions. [2021-07-13 19:18:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:18:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:33,906 INFO L225 Difference]: With dead ends: 11837 [2021-07-13 19:18:33,906 INFO L226 Difference]: Without dead ends: 11837 [2021-07-13 19:18:33,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:18:33,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-07-13 19:18:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11079. [2021-07-13 19:18:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11079 states, 11078 states have (on average 2.998826502978877) internal successors, (33221), 11078 states have internal predecessors, (33221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 33221 transitions. [2021-07-13 19:18:34,093 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 33221 transitions. Word has length 22 [2021-07-13 19:18:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:34,093 INFO L482 AbstractCegarLoop]: Abstraction has 11079 states and 33221 transitions. [2021-07-13 19:18:34,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:34,094 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 33221 transitions. [2021-07-13 19:18:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:34,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:34,105 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:34,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2968 [2021-07-13 19:18:34,309 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1826781103, now seen corresponding path program 256 times [2021-07-13 19:18:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457771139] [2021-07-13 19:18:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:34,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:34,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457771139] [2021-07-13 19:18:34,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457771139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:34,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421174018] [2021-07-13 19:18:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:34,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:34,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:34,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:34,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421174018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:34,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:34,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:34,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731331095] [2021-07-13 19:18:34,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:34,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:34,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:34,434 INFO L87 Difference]: Start difference. First operand 11079 states and 33221 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) [2021-07-13 19:18:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:34,653 INFO L93 Difference]: Finished difference Result 11467 states and 33833 transitions. [2021-07-13 19:18:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:18:34,654 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 22 [2021-07-13 19:18:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:34,671 INFO L225 Difference]: With dead ends: 11467 [2021-07-13 19:18:34,671 INFO L226 Difference]: Without dead ends: 11459 [2021-07-13 19:18:34,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:18:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2021-07-13 19:18:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11123. [2021-07-13 19:18:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11123 states, 11122 states have (on average 2.999550440568243) internal successors, (33361), 11122 states have internal predecessors, (33361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 33361 transitions. [2021-07-13 19:18:34,835 INFO L78 Accepts]: Start accepts. Automaton has 11123 states and 33361 transitions. Word has length 22 [2021-07-13 19:18:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:34,835 INFO L482 AbstractCegarLoop]: Abstraction has 11123 states and 33361 transitions. [2021-07-13 19:18:34,835 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) [2021-07-13 19:18:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 11123 states and 33361 transitions. [2021-07-13 19:18:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:34,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:34,846 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:35,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2969,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:35,061 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1995549679, now seen corresponding path program 257 times [2021-07-13 19:18:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:35,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417177899] [2021-07-13 19:18:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:35,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417177899] [2021-07-13 19:18:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417177899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031813764] [2021-07-13 19:18:35,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:35,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:35,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031813764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:35,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:35,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:35,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034090723] [2021-07-13 19:18:35,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:35,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:35,186 INFO L87 Difference]: Start difference. First operand 11123 states and 33361 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:35,387 INFO L93 Difference]: Finished difference Result 14272 states and 42332 transitions. [2021-07-13 19:18:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:35,411 INFO L225 Difference]: With dead ends: 14272 [2021-07-13 19:18:35,411 INFO L226 Difference]: Without dead ends: 14272 [2021-07-13 19:18:35,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:18:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2021-07-13 19:18:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 8542. [2021-07-13 19:18:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8542 states, 8541 states have (on average 2.9779885259337315) internal successors, (25435), 8541 states have internal predecessors, (25435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8542 states to 8542 states and 25435 transitions. [2021-07-13 19:18:35,592 INFO L78 Accepts]: Start accepts. Automaton has 8542 states and 25435 transitions. Word has length 22 [2021-07-13 19:18:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:35,592 INFO L482 AbstractCegarLoop]: Abstraction has 8542 states and 25435 transitions. [2021-07-13 19:18:35,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8542 states and 25435 transitions. [2021-07-13 19:18:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:35,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:35,601 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:35,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2970 [2021-07-13 19:18:35,815 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash -155561425, now seen corresponding path program 258 times [2021-07-13 19:18:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:35,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086815030] [2021-07-13 19:18:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:35,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086815030] [2021-07-13 19:18:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086815030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683089321] [2021-07-13 19:18:35,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:35,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:18:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:35,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683089321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:35,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:35,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:35,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013646046] [2021-07-13 19:18:35,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:35,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:35,930 INFO L87 Difference]: Start difference. First operand 8542 states and 25435 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) [2021-07-13 19:18:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:36,074 INFO L93 Difference]: Finished difference Result 9541 states and 27821 transitions. [2021-07-13 19:18:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:36,075 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 22 [2021-07-13 19:18:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:36,092 INFO L225 Difference]: With dead ends: 9541 [2021-07-13 19:18:36,092 INFO L226 Difference]: Without dead ends: 9541 [2021-07-13 19:18:36,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-07-13 19:18:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8634. [2021-07-13 19:18:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 2.976833082358392) internal successors, (25699), 8633 states have internal predecessors, (25699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 25699 transitions. [2021-07-13 19:18:36,252 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 25699 transitions. Word has length 22 [2021-07-13 19:18:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:36,252 INFO L482 AbstractCegarLoop]: Abstraction has 8634 states and 25699 transitions. [2021-07-13 19:18:36,252 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) [2021-07-13 19:18:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 25699 transitions. [2021-07-13 19:18:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:36,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:36,262 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:36,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:36,477 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash 382294153, now seen corresponding path program 259 times [2021-07-13 19:18:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009156281] [2021-07-13 19:18:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:36,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009156281] [2021-07-13 19:18:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009156281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064333736] [2021-07-13 19:18:36,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:36,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:36,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:36,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064333736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:36,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:36,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:36,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588023867] [2021-07-13 19:18:36,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:36,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:36,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:36,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:36,609 INFO L87 Difference]: Start difference. First operand 8634 states and 25699 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) [2021-07-13 19:18:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:36,743 INFO L93 Difference]: Finished difference Result 9330 states and 27244 transitions. [2021-07-13 19:18:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:36,744 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 22 [2021-07-13 19:18:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:36,761 INFO L225 Difference]: With dead ends: 9330 [2021-07-13 19:18:36,761 INFO L226 Difference]: Without dead ends: 9330 [2021-07-13 19:18:36,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-07-13 19:18:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 6762. [2021-07-13 19:18:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 2.9630232214169503) internal successors, (20033), 6761 states have internal predecessors, (20033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 20033 transitions. [2021-07-13 19:18:36,895 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 20033 transitions. Word has length 22 [2021-07-13 19:18:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:36,895 INFO L482 AbstractCegarLoop]: Abstraction has 6762 states and 20033 transitions. [2021-07-13 19:18:36,895 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) [2021-07-13 19:18:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 20033 transitions. [2021-07-13 19:18:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:36,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:36,902 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:37,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2972 [2021-07-13 19:18:37,117 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash -124052113, now seen corresponding path program 260 times [2021-07-13 19:18:37,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:37,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702715184] [2021-07-13 19:18:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:37,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702715184] [2021-07-13 19:18:37,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702715184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249610478] [2021-07-13 19:18:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:37,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:37,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249610478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:37,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:37,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32828956] [2021-07-13 19:18:37,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:37,244 INFO L87 Difference]: Start difference. First operand 6762 states and 20033 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) [2021-07-13 19:18:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:37,362 INFO L93 Difference]: Finished difference Result 8299 states and 24037 transitions. [2021-07-13 19:18:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:18:37,363 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 22 [2021-07-13 19:18:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:37,436 INFO L225 Difference]: With dead ends: 8299 [2021-07-13 19:18:37,436 INFO L226 Difference]: Without dead ends: 8299 [2021-07-13 19:18:37,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2021-07-13 19:18:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 7676. [2021-07-13 19:18:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 7675 states have (on average 2.9603908794788274) internal successors, (22721), 7675 states have internal predecessors, (22721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 22721 transitions. [2021-07-13 19:18:37,561 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 22721 transitions. Word has length 22 [2021-07-13 19:18:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:37,561 INFO L482 AbstractCegarLoop]: Abstraction has 7676 states and 22721 transitions. [2021-07-13 19:18:37,561 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) [2021-07-13 19:18:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 22721 transitions. [2021-07-13 19:18:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:37,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:37,570 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:37,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2973,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:37,786 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:37,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:37,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1359082825, now seen corresponding path program 261 times [2021-07-13 19:18:37,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:37,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432361052] [2021-07-13 19:18:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:37,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432361052] [2021-07-13 19:18:37,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432361052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075696458] [2021-07-13 19:18:37,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:37,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:37,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075696458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:37,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:37,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061923494] [2021-07-13 19:18:37,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:37,921 INFO L87 Difference]: Start difference. First operand 7676 states and 22721 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:38,097 INFO L93 Difference]: Finished difference Result 8482 states and 24462 transitions. [2021-07-13 19:18:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:38,112 INFO L225 Difference]: With dead ends: 8482 [2021-07-13 19:18:38,112 INFO L226 Difference]: Without dead ends: 8482 [2021-07-13 19:18:38,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:18:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-07-13 19:18:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 7047. [2021-07-13 19:18:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.9541583877377233) internal successors, (20815), 7046 states have internal predecessors, (20815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 20815 transitions. [2021-07-13 19:18:38,244 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 20815 transitions. Word has length 22 [2021-07-13 19:18:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:38,244 INFO L482 AbstractCegarLoop]: Abstraction has 7047 states and 20815 transitions. [2021-07-13 19:18:38,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 20815 transitions. [2021-07-13 19:18:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:38,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:38,252 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:38,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-07-13 19:18:38,468 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash 91625647, now seen corresponding path program 262 times [2021-07-13 19:18:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:38,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112565006] [2021-07-13 19:18:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:38,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:38,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112565006] [2021-07-13 19:18:38,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112565006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:38,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697291203] [2021-07-13 19:18:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:38,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:38,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697291203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:38,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:38,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:38,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374222953] [2021-07-13 19:18:38,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:38,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:38,605 INFO L87 Difference]: Start difference. First operand 7047 states and 20815 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:38,886 INFO L93 Difference]: Finished difference Result 8517 states and 24388 transitions. [2021-07-13 19:18:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:18:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:38,901 INFO L225 Difference]: With dead ends: 8517 [2021-07-13 19:18:38,901 INFO L226 Difference]: Without dead ends: 8517 [2021-07-13 19:18:38,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:18:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-07-13 19:18:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 6822. [2021-07-13 19:18:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.9705321800322535) internal successors, (20262), 6821 states have internal predecessors, (20262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 20262 transitions. [2021-07-13 19:18:39,029 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 20262 transitions. Word has length 22 [2021-07-13 19:18:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:39,030 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 20262 transitions. [2021-07-13 19:18:39,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 20262 transitions. [2021-07-13 19:18:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:39,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:39,037 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:39,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-07-13 19:18:39,237 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:39,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1108198033, now seen corresponding path program 263 times [2021-07-13 19:18:39,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:39,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017311825] [2021-07-13 19:18:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:39,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017311825] [2021-07-13 19:18:39,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017311825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:39,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109966405] [2021-07-13 19:18:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:39,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:39,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:39,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109966405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:39,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:39,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:39,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231338005] [2021-07-13 19:18:39,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:39,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:39,353 INFO L87 Difference]: Start difference. First operand 6822 states and 20262 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) [2021-07-13 19:18:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:39,518 INFO L93 Difference]: Finished difference Result 7102 states and 20626 transitions. [2021-07-13 19:18:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:39,518 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 22 [2021-07-13 19:18:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:39,528 INFO L225 Difference]: With dead ends: 7102 [2021-07-13 19:18:39,528 INFO L226 Difference]: Without dead ends: 7096 [2021-07-13 19:18:39,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-07-13 19:18:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6624. [2021-07-13 19:18:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.958930998037143) internal successors, (19597), 6623 states have internal predecessors, (19597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19597 transitions. [2021-07-13 19:18:39,633 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19597 transitions. Word has length 22 [2021-07-13 19:18:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:39,633 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19597 transitions. [2021-07-13 19:18:39,633 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) [2021-07-13 19:18:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19597 transitions. [2021-07-13 19:18:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:39,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:39,640 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:39,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:39,853 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1172512213, now seen corresponding path program 264 times [2021-07-13 19:18:39,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:39,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377867325] [2021-07-13 19:18:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:39,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377867325] [2021-07-13 19:18:39,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377867325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787021531] [2021-07-13 19:18:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:39,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:18:39,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:39,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:39,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:39,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787021531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:39,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:39,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:18:39,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254811909] [2021-07-13 19:18:39,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:39,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:39,983 INFO L87 Difference]: Start difference. First operand 6624 states and 19597 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:40,085 INFO L93 Difference]: Finished difference Result 6797 states and 19752 transitions. [2021-07-13 19:18:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:40,097 INFO L225 Difference]: With dead ends: 6797 [2021-07-13 19:18:40,097 INFO L226 Difference]: Without dead ends: 6795 [2021-07-13 19:18:40,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-07-13 19:18:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 6384. [2021-07-13 19:18:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 2.953313488955037) internal successors, (18851), 6383 states have internal predecessors, (18851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 18851 transitions. [2021-07-13 19:18:40,204 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 18851 transitions. Word has length 22 [2021-07-13 19:18:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:40,204 INFO L482 AbstractCegarLoop]: Abstraction has 6384 states and 18851 transitions. [2021-07-13 19:18:40,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 18851 transitions. [2021-07-13 19:18:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:40,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:40,211 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:40,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2977 [2021-07-13 19:18:40,427 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1639320145, now seen corresponding path program 265 times [2021-07-13 19:18:40,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:40,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166742612] [2021-07-13 19:18:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:40,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:40,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166742612] [2021-07-13 19:18:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166742612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:40,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5839087] [2021-07-13 19:18:40,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:40,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5839087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:40,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:40,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:18:40,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100256779] [2021-07-13 19:18:40,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:40,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:40,562 INFO L87 Difference]: Start difference. First operand 6384 states and 18851 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:40,716 INFO L93 Difference]: Finished difference Result 6844 states and 19836 transitions. [2021-07-13 19:18:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:40,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:18:40,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:40,727 INFO L225 Difference]: With dead ends: 6844 [2021-07-13 19:18:40,727 INFO L226 Difference]: Without dead ends: 6844 [2021-07-13 19:18:40,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:18:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-07-13 19:18:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5821. [2021-07-13 19:18:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.943986254295533) internal successors, (17134), 5820 states have internal predecessors, (17134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17134 transitions. [2021-07-13 19:18:40,823 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17134 transitions. Word has length 22 [2021-07-13 19:18:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:40,823 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17134 transitions. [2021-07-13 19:18:40,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17134 transitions. [2021-07-13 19:18:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:40,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:40,830 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:41,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:41,036 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1388189973, now seen corresponding path program 266 times [2021-07-13 19:18:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:41,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610084305] [2021-07-13 19:18:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:41,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:41,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610084305] [2021-07-13 19:18:41,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610084305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:41,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88538559] [2021-07-13 19:18:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:41,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:41,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:41,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:41,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:41,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88538559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:41,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:41,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:18:41,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373890672] [2021-07-13 19:18:41,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:41,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:41,170 INFO L87 Difference]: Start difference. First operand 5821 states and 17134 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:41,478 INFO L93 Difference]: Finished difference Result 6844 states and 19503 transitions. [2021-07-13 19:18:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:18:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:18:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:41,530 INFO L225 Difference]: With dead ends: 6844 [2021-07-13 19:18:41,530 INFO L226 Difference]: Without dead ends: 6844 [2021-07-13 19:18:41,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:18:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-07-13 19:18:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5659. [2021-07-13 19:18:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.957582184517497) internal successors, (16734), 5658 states have internal predecessors, (16734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16734 transitions. [2021-07-13 19:18:41,614 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16734 transitions. Word has length 22 [2021-07-13 19:18:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:41,614 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 16734 transitions. [2021-07-13 19:18:41,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16734 transitions. [2021-07-13 19:18:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:41,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:41,620 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:41,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2979 [2021-07-13 19:18:41,835 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash -2101570705, now seen corresponding path program 267 times [2021-07-13 19:18:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:41,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985256336] [2021-07-13 19:18:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:41,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:41,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985256336] [2021-07-13 19:18:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985256336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:41,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460534583] [2021-07-13 19:18:41,882 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 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 [2021-07-13 19:18:41,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:41,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:41,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:41,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460534583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:41,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:41,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:41,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704288163] [2021-07-13 19:18:41,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:41,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:41,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:41,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:41,965 INFO L87 Difference]: Start difference. First operand 5659 states and 16734 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) [2021-07-13 19:18:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:42,122 INFO L93 Difference]: Finished difference Result 5851 states and 16961 transitions. [2021-07-13 19:18:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:42,123 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 22 [2021-07-13 19:18:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:42,132 INFO L225 Difference]: With dead ends: 5851 [2021-07-13 19:18:42,133 INFO L226 Difference]: Without dead ends: 5847 [2021-07-13 19:18:42,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2021-07-13 19:18:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5652. [2021-07-13 19:18:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5651 states have (on average 2.956290921960715) internal successors, (16706), 5651 states have internal predecessors, (16706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 16706 transitions. [2021-07-13 19:18:42,227 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 16706 transitions. Word has length 22 [2021-07-13 19:18:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:42,227 INFO L482 AbstractCegarLoop]: Abstraction has 5652 states and 16706 transitions. [2021-07-13 19:18:42,228 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) [2021-07-13 19:18:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 16706 transitions. [2021-07-13 19:18:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:42,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:42,234 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:42,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2980 [2021-07-13 19:18:42,449 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:42,450 INFO L82 PathProgramCache]: Analyzing trace with hash -371100689, now seen corresponding path program 268 times [2021-07-13 19:18:42,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:42,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533710994] [2021-07-13 19:18:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:42,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:42,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533710994] [2021-07-13 19:18:42,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533710994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:42,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120702811] [2021-07-13 19:18:42,525 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 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 [2021-07-13 19:18:42,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:42,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:42,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120702811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:42,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:42,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:18:42,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722205744] [2021-07-13 19:18:42,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:42,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:42,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:42,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:42,594 INFO L87 Difference]: Start difference. First operand 5652 states and 16706 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:42,835 INFO L93 Difference]: Finished difference Result 7203 states and 20623 transitions. [2021-07-13 19:18:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:18:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:18:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:42,848 INFO L225 Difference]: With dead ends: 7203 [2021-07-13 19:18:42,848 INFO L226 Difference]: Without dead ends: 7203 [2021-07-13 19:18:42,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:18:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-07-13 19:18:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 6624. [2021-07-13 19:18:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.953042427902763) internal successors, (19558), 6623 states have internal predecessors, (19558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19558 transitions. [2021-07-13 19:18:42,957 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19558 transitions. Word has length 22 [2021-07-13 19:18:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:42,957 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19558 transitions. [2021-07-13 19:18:42,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19558 transitions. [2021-07-13 19:18:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:42,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:42,964 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:43,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2981,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:43,179 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1096732975, now seen corresponding path program 269 times [2021-07-13 19:18:43,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:43,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943494304] [2021-07-13 19:18:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:43,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943494304] [2021-07-13 19:18:43,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943494304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253026671] [2021-07-13 19:18:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:43,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:43,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:43,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253026671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:43,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:43,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:43,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338199921] [2021-07-13 19:18:43,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:43,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:43,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:43,331 INFO L87 Difference]: Start difference. First operand 6624 states and 19558 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) [2021-07-13 19:18:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:43,561 INFO L93 Difference]: Finished difference Result 6862 states and 19866 transitions. [2021-07-13 19:18:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:43,577 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 22 [2021-07-13 19:18:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:43,589 INFO L225 Difference]: With dead ends: 6862 [2021-07-13 19:18:43,589 INFO L226 Difference]: Without dead ends: 6858 [2021-07-13 19:18:43,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-07-13 19:18:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6638. [2021-07-13 19:18:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 2.9532921500678015) internal successors, (19601), 6637 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 19601 transitions. [2021-07-13 19:18:43,708 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 19601 transitions. Word has length 22 [2021-07-13 19:18:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:43,709 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 19601 transitions. [2021-07-13 19:18:43,709 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) [2021-07-13 19:18:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 19601 transitions. [2021-07-13 19:18:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:43,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:43,715 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:43,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-07-13 19:18:43,929 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash 621016085, now seen corresponding path program 270 times [2021-07-13 19:18:43,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:43,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124281849] [2021-07-13 19:18:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:43,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124281849] [2021-07-13 19:18:43,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124281849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677321200] [2021-07-13 19:18:43,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:44,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:44,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677321200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:44,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:44,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:44,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83933930] [2021-07-13 19:18:44,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:44,040 INFO L87 Difference]: Start difference. First operand 6638 states and 19601 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) [2021-07-13 19:18:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:44,151 INFO L93 Difference]: Finished difference Result 7175 states and 20692 transitions. [2021-07-13 19:18:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:44,152 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 22 [2021-07-13 19:18:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:44,164 INFO L225 Difference]: With dead ends: 7175 [2021-07-13 19:18:44,164 INFO L226 Difference]: Without dead ends: 7175 [2021-07-13 19:18:44,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-07-13 19:18:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6639. [2021-07-13 19:18:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9528472431455257) internal successors, (19601), 6638 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19601 transitions. [2021-07-13 19:18:44,274 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19601 transitions. Word has length 22 [2021-07-13 19:18:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:44,274 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19601 transitions. [2021-07-13 19:18:44,275 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) [2021-07-13 19:18:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19601 transitions. [2021-07-13 19:18:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:44,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:44,281 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:44,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2983,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:44,497 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1108031249, now seen corresponding path program 271 times [2021-07-13 19:18:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:44,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930984440] [2021-07-13 19:18:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:44,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:44,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930984440] [2021-07-13 19:18:44,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930984440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:44,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821277667] [2021-07-13 19:18:44,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:44,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821277667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:44,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:44,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 19:18:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813490176] [2021-07-13 19:18:44,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:44,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:44,611 INFO L87 Difference]: Start difference. First operand 6639 states and 19601 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) [2021-07-13 19:18:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:44,761 INFO L93 Difference]: Finished difference Result 7416 states and 21327 transitions. [2021-07-13 19:18:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:44,761 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 22 [2021-07-13 19:18:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:44,774 INFO L225 Difference]: With dead ends: 7416 [2021-07-13 19:18:44,774 INFO L226 Difference]: Without dead ends: 7416 [2021-07-13 19:18:44,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-07-13 19:18:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6639. [2021-07-13 19:18:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9526965953600484) internal successors, (19600), 6638 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19600 transitions. [2021-07-13 19:18:44,889 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19600 transitions. Word has length 22 [2021-07-13 19:18:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:44,889 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19600 transitions. [2021-07-13 19:18:44,890 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) [2021-07-13 19:18:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19600 transitions. [2021-07-13 19:18:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:44,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:44,896 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:45,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2984 [2021-07-13 19:18:45,112 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:45,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1126076245, now seen corresponding path program 272 times [2021-07-13 19:18:45,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:45,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078699216] [2021-07-13 19:18:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:45,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:45,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078699216] [2021-07-13 19:18:45,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078699216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:45,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383546418] [2021-07-13 19:18:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:45,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:45,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:45,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383546418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:45,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:45,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:18:45,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393871120] [2021-07-13 19:18:45,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:45,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:45,233 INFO L87 Difference]: Start difference. First operand 6639 states and 19600 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) [2021-07-13 19:18:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:45,399 INFO L93 Difference]: Finished difference Result 7505 states and 21578 transitions. [2021-07-13 19:18:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:45,399 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 22 [2021-07-13 19:18:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:45,412 INFO L225 Difference]: With dead ends: 7505 [2021-07-13 19:18:45,413 INFO L226 Difference]: Without dead ends: 7505 [2021-07-13 19:18:45,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:18:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-07-13 19:18:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 6648. [2021-07-13 19:18:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6648 states, 6647 states have (on average 2.9527606438995035) internal successors, (19627), 6647 states have internal predecessors, (19627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 19627 transitions. [2021-07-13 19:18:45,531 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 19627 transitions. Word has length 22 [2021-07-13 19:18:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:45,531 INFO L482 AbstractCegarLoop]: Abstraction has 6648 states and 19627 transitions. [2021-07-13 19:18:45,531 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) [2021-07-13 19:18:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 19627 transitions. [2021-07-13 19:18:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:45,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:45,538 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:45,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2985,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:45,754 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:45,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1663931823, now seen corresponding path program 273 times [2021-07-13 19:18:45,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:45,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358823142] [2021-07-13 19:18:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:45,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:45,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358823142] [2021-07-13 19:18:45,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358823142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:45,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233094982] [2021-07-13 19:18:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:45,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:45,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:45,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:45,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:45,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233094982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:45,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:45,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-13 19:18:45,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116120808] [2021-07-13 19:18:45,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:45,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:45,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:45,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:45,935 INFO L87 Difference]: Start difference. First operand 6648 states and 19627 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) [2021-07-13 19:18:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:46,083 INFO L93 Difference]: Finished difference Result 8295 states and 23872 transitions. [2021-07-13 19:18:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:46,084 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 22 [2021-07-13 19:18:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:46,096 INFO L225 Difference]: With dead ends: 8295 [2021-07-13 19:18:46,096 INFO L226 Difference]: Without dead ends: 8295 [2021-07-13 19:18:46,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:18:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-07-13 19:18:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 7544. [2021-07-13 19:18:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 2.966193822086703) internal successors, (22374), 7543 states have internal predecessors, (22374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 22374 transitions. [2021-07-13 19:18:46,211 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 22374 transitions. Word has length 22 [2021-07-13 19:18:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:46,211 INFO L482 AbstractCegarLoop]: Abstraction has 7544 states and 22374 transitions. [2021-07-13 19:18:46,211 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) [2021-07-13 19:18:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 22374 transitions. [2021-07-13 19:18:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:46,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:46,219 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:46,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2986,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:46,434 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1157585557, now seen corresponding path program 274 times [2021-07-13 19:18:46,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:46,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495199054] [2021-07-13 19:18:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:46,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495199054] [2021-07-13 19:18:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495199054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813006032] [2021-07-13 19:18:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:46,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:46,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:46,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813006032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:46,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:46,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:18:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406111642] [2021-07-13 19:18:46,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:46,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:46,571 INFO L87 Difference]: Start difference. First operand 7544 states and 22374 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:46,707 INFO L93 Difference]: Finished difference Result 8145 states and 23520 transitions. [2021-07-13 19:18:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:46,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:46,720 INFO L225 Difference]: With dead ends: 8145 [2021-07-13 19:18:46,720 INFO L226 Difference]: Without dead ends: 8145 [2021-07-13 19:18:46,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-07-13 19:18:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7488. [2021-07-13 19:18:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 2.9648724455723254) internal successors, (22198), 7487 states have internal predecessors, (22198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 22198 transitions. [2021-07-13 19:18:46,833 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 22198 transitions. Word has length 22 [2021-07-13 19:18:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:46,833 INFO L482 AbstractCegarLoop]: Abstraction has 7488 states and 22198 transitions. [2021-07-13 19:18:46,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 22198 transitions. [2021-07-13 19:18:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:46,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:46,840 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:47,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2987 [2021-07-13 19:18:47,056 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1654246801, now seen corresponding path program 275 times [2021-07-13 19:18:47,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:47,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656016145] [2021-07-13 19:18:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:47,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656016145] [2021-07-13 19:18:47,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656016145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184886869] [2021-07-13 19:18:47,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:47,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:18:47,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:47,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:47,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:47,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184886869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:47,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:47,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:18:47,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494513414] [2021-07-13 19:18:47,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:47,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:47,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:47,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:47,207 INFO L87 Difference]: Start difference. First operand 7488 states and 22198 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:47,353 INFO L93 Difference]: Finished difference Result 9477 states and 27589 transitions. [2021-07-13 19:18:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:47,370 INFO L225 Difference]: With dead ends: 9477 [2021-07-13 19:18:47,370 INFO L226 Difference]: Without dead ends: 9477 [2021-07-13 19:18:47,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:18:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-07-13 19:18:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8935. [2021-07-13 19:18:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9705618983657938) internal successors, (26539), 8934 states have internal predecessors, (26539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26539 transitions. [2021-07-13 19:18:47,516 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26539 transitions. Word has length 22 [2021-07-13 19:18:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:47,516 INFO L482 AbstractCegarLoop]: Abstraction has 8935 states and 26539 transitions. [2021-07-13 19:18:47,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26539 transitions. [2021-07-13 19:18:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:47,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:47,525 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:47,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:47,740 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1373263317, now seen corresponding path program 276 times [2021-07-13 19:18:47,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:47,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667778580] [2021-07-13 19:18:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:47,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667778580] [2021-07-13 19:18:47,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667778580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:47,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052381584] [2021-07-13 19:18:47,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:18:47,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:18:47,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:47,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052381584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:47,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:47,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:18:47,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071567133] [2021-07-13 19:18:47,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:47,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:47,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:47,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:47,885 INFO L87 Difference]: Start difference. First operand 8935 states and 26539 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:48,102 INFO L93 Difference]: Finished difference Result 9543 states and 27760 transitions. [2021-07-13 19:18:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:18:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:48,119 INFO L225 Difference]: With dead ends: 9543 [2021-07-13 19:18:48,119 INFO L226 Difference]: Without dead ends: 9543 [2021-07-13 19:18:48,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:18:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-07-13 19:18:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 8928. [2021-07-13 19:18:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.9704267951159404) internal successors, (26517), 8927 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 26517 transitions. [2021-07-13 19:18:48,271 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 26517 transitions. Word has length 22 [2021-07-13 19:18:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:48,271 INFO L482 AbstractCegarLoop]: Abstraction has 8928 states and 26517 transitions. [2021-07-13 19:18:48,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 26517 transitions. [2021-07-13 19:18:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:48,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:48,282 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:48,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2989 [2021-07-13 19:18:48,497 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash 736796463, now seen corresponding path program 277 times [2021-07-13 19:18:48,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:48,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702151686] [2021-07-13 19:18:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:48,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:48,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702151686] [2021-07-13 19:18:48,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702151686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:48,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513188381] [2021-07-13 19:18:48,611 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 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 [2021-07-13 19:18:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:48,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:48,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513188381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:48,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:48,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:18:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083494460] [2021-07-13 19:18:48,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:48,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:48,699 INFO L87 Difference]: Start difference. First operand 8928 states and 26517 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:49,017 INFO L93 Difference]: Finished difference Result 10324 states and 30070 transitions. [2021-07-13 19:18:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:18:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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 22 [2021-07-13 19:18:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:49,034 INFO L225 Difference]: With dead ends: 10324 [2021-07-13 19:18:49,034 INFO L226 Difference]: Without dead ends: 10324 [2021-07-13 19:18:49,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:18:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10324 states. [2021-07-13 19:18:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10324 to 9639. [2021-07-13 19:18:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 2.9726084249844367) internal successors, (28650), 9638 states have internal predecessors, (28650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 28650 transitions. [2021-07-13 19:18:49,192 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 28650 transitions. Word has length 22 [2021-07-13 19:18:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:49,192 INFO L482 AbstractCegarLoop]: Abstraction has 9639 states and 28650 transitions. [2021-07-13 19:18:49,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 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) [2021-07-13 19:18:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 28650 transitions. [2021-07-13 19:18:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:49,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:49,202 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:49,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:49,417 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1039148775, now seen corresponding path program 278 times [2021-07-13 19:18:49,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:49,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223611270] [2021-07-13 19:18:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:49,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223611270] [2021-07-13 19:18:49,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223611270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:49,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310352657] [2021-07-13 19:18:49,505 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 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 [2021-07-13 19:18:49,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:49,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310352657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:49,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:49,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:18:49,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64041384] [2021-07-13 19:18:49,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:49,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:49,588 INFO L87 Difference]: Start difference. First operand 9639 states and 28650 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:49,903 INFO L93 Difference]: Finished difference Result 9988 states and 29135 transitions. [2021-07-13 19:18:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:18:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:49,920 INFO L225 Difference]: With dead ends: 9988 [2021-07-13 19:18:49,920 INFO L226 Difference]: Without dead ends: 9980 [2021-07-13 19:18:49,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:18:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-07-13 19:18:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 9589. [2021-07-13 19:18:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9588 states have (on average 2.9695452649144762) internal successors, (28472), 9588 states have internal predecessors, (28472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28472 transitions. [2021-07-13 19:18:50,096 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28472 transitions. Word has length 22 [2021-07-13 19:18:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:50,096 INFO L482 AbstractCegarLoop]: Abstraction has 9589 states and 28472 transitions. [2021-07-13 19:18:50,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28472 transitions. [2021-07-13 19:18:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:50,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:50,107 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:50,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-07-13 19:18:50,322 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1158733017, now seen corresponding path program 279 times [2021-07-13 19:18:50,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:50,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964582429] [2021-07-13 19:18:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:50,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:50,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964582429] [2021-07-13 19:18:50,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964582429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:50,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055374239] [2021-07-13 19:18:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:50,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:18:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:50,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055374239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:50,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:50,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:18:50,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539544057] [2021-07-13 19:18:50,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:50,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:50,489 INFO L87 Difference]: Start difference. First operand 9589 states and 28472 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) [2021-07-13 19:18:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:50,909 INFO L93 Difference]: Finished difference Result 11995 states and 35313 transitions. [2021-07-13 19:18:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:18:50,910 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 22 [2021-07-13 19:18:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:50,932 INFO L225 Difference]: With dead ends: 11995 [2021-07-13 19:18:50,933 INFO L226 Difference]: Without dead ends: 11995 [2021-07-13 19:18:50,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:18:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2021-07-13 19:18:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 9342. [2021-07-13 19:18:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9342 states, 9341 states have (on average 2.9680976340862864) internal successors, (27725), 9341 states have internal predecessors, (27725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 27725 transitions. [2021-07-13 19:18:51,112 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 27725 transitions. Word has length 22 [2021-07-13 19:18:51,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:51,112 INFO L482 AbstractCegarLoop]: Abstraction has 9342 states and 27725 transitions. [2021-07-13 19:18:51,112 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) [2021-07-13 19:18:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 27725 transitions. [2021-07-13 19:18:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:51,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:51,122 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:51,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-07-13 19:18:51,337 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:51,337 INFO L82 PathProgramCache]: Analyzing trace with hash 876299495, now seen corresponding path program 280 times [2021-07-13 19:18:51,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:51,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152220783] [2021-07-13 19:18:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:51,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:51,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152220783] [2021-07-13 19:18:51,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152220783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:51,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007022660] [2021-07-13 19:18:51,408 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 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 [2021-07-13 19:18:51,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:51,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:51,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007022660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:51,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:51,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 19:18:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771611045] [2021-07-13 19:18:51,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:51,491 INFO L87 Difference]: Start difference. First operand 9342 states and 27725 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-07-13 19:18:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:51,760 INFO L93 Difference]: Finished difference Result 9981 states and 29225 transitions. [2021-07-13 19:18:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:18:51,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 22 [2021-07-13 19:18:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:51,777 INFO L225 Difference]: With dead ends: 9981 [2021-07-13 19:18:51,777 INFO L226 Difference]: Without dead ends: 9981 [2021-07-13 19:18:51,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:18:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-07-13 19:18:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9425. [2021-07-13 19:18:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9425 states, 9424 states have (on average 2.9691213921901527) internal successors, (27981), 9424 states have internal predecessors, (27981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 27981 transitions. [2021-07-13 19:18:51,932 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 27981 transitions. Word has length 22 [2021-07-13 19:18:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:51,932 INFO L482 AbstractCegarLoop]: Abstraction has 9425 states and 27981 transitions. [2021-07-13 19:18:51,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-07-13 19:18:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 27981 transitions. [2021-07-13 19:18:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:51,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:51,949 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:52,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2993 [2021-07-13 19:18:52,164 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:52,164 INFO L82 PathProgramCache]: Analyzing trace with hash 369953229, now seen corresponding path program 281 times [2021-07-13 19:18:52,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:52,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806955152] [2021-07-13 19:18:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:52,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806955152] [2021-07-13 19:18:52,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806955152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897120142] [2021-07-13 19:18:52,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:52,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897120142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:52,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:52,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 19:18:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372594030] [2021-07-13 19:18:52,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:52,329 INFO L87 Difference]: Start difference. First operand 9425 states and 27981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:52,612 INFO L93 Difference]: Finished difference Result 9826 states and 28836 transitions. [2021-07-13 19:18:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:18:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:52,631 INFO L225 Difference]: With dead ends: 9826 [2021-07-13 19:18:52,631 INFO L226 Difference]: Without dead ends: 9826 [2021-07-13 19:18:52,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:18:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-07-13 19:18:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 8609. [2021-07-13 19:18:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 2.963638475836431) internal successors, (25511), 8608 states have internal predecessors, (25511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 25511 transitions. [2021-07-13 19:18:52,779 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 25511 transitions. Word has length 22 [2021-07-13 19:18:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:52,779 INFO L482 AbstractCegarLoop]: Abstraction has 8609 states and 25511 transitions. [2021-07-13 19:18:52,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 25511 transitions. [2021-07-13 19:18:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:52,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:52,788 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:53,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-07-13 19:18:53,004 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1853088167, now seen corresponding path program 282 times [2021-07-13 19:18:53,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:53,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331003392] [2021-07-13 19:18:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:53,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331003392] [2021-07-13 19:18:53,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331003392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40281877] [2021-07-13 19:18:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:53,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:18:53,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:53,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40281877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:53,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:53,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 19:18:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548916457] [2021-07-13 19:18:53,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:53,202 INFO L87 Difference]: Start difference. First operand 8609 states and 25511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:53,477 INFO L93 Difference]: Finished difference Result 9527 states and 27764 transitions. [2021-07-13 19:18:53,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:53,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:53,494 INFO L225 Difference]: With dead ends: 9527 [2021-07-13 19:18:53,494 INFO L226 Difference]: Without dead ends: 9527 [2021-07-13 19:18:53,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:18:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-07-13 19:18:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9038. [2021-07-13 19:18:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 2.9622662387960608) internal successors, (26770), 9037 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 26770 transitions. [2021-07-13 19:18:53,731 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 26770 transitions. Word has length 22 [2021-07-13 19:18:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:53,731 INFO L482 AbstractCegarLoop]: Abstraction has 9038 states and 26770 transitions. [2021-07-13 19:18:53,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 26770 transitions. [2021-07-13 19:18:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:53,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:53,740 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:53,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2995,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:53,956 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:53,956 INFO L82 PathProgramCache]: Analyzing trace with hash 585630989, now seen corresponding path program 283 times [2021-07-13 19:18:53,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:53,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154230973] [2021-07-13 19:18:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:54,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:54,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154230973] [2021-07-13 19:18:54,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154230973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:54,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906478426] [2021-07-13 19:18:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:54,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:54,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906478426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:54,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:54,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:18:54,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869484409] [2021-07-13 19:18:54,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:54,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:54,116 INFO L87 Difference]: Start difference. First operand 9038 states and 26770 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) [2021-07-13 19:18:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:54,509 INFO L93 Difference]: Finished difference Result 9636 states and 28011 transitions. [2021-07-13 19:18:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:18:54,510 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 22 [2021-07-13 19:18:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:54,527 INFO L225 Difference]: With dead ends: 9636 [2021-07-13 19:18:54,527 INFO L226 Difference]: Without dead ends: 9636 [2021-07-13 19:18:54,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:18:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-07-13 19:18:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 8808. [2021-07-13 19:18:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.9608266151924605) internal successors, (26076), 8807 states have internal predecessors, (26076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 26076 transitions. [2021-07-13 19:18:54,672 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 26076 transitions. Word has length 22 [2021-07-13 19:18:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:54,672 INFO L482 AbstractCegarLoop]: Abstraction has 8808 states and 26076 transitions. [2021-07-13 19:18:54,672 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) [2021-07-13 19:18:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 26076 transitions. [2021-07-13 19:18:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:54,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:54,681 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:54,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2996 [2021-07-13 19:18:54,896 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -50835865, now seen corresponding path program 284 times [2021-07-13 19:18:54,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:54,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829175162] [2021-07-13 19:18:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:54,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:54,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829175162] [2021-07-13 19:18:54,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829175162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:54,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843641250] [2021-07-13 19:18:54,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:18:55,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:55,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:55,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843641250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:55,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:55,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:18:55,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150413016] [2021-07-13 19:18:55,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:55,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:55,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:55,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:55,074 INFO L87 Difference]: Start difference. First operand 8808 states and 26076 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) [2021-07-13 19:18:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:55,521 INFO L93 Difference]: Finished difference Result 9760 states and 28323 transitions. [2021-07-13 19:18:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:18:55,521 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 22 [2021-07-13 19:18:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:55,537 INFO L225 Difference]: With dead ends: 9760 [2021-07-13 19:18:55,537 INFO L226 Difference]: Without dead ends: 9760 [2021-07-13 19:18:55,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:18:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2021-07-13 19:18:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 8633. [2021-07-13 19:18:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8632 states have (on average 2.9661723818350323) internal successors, (25604), 8632 states have internal predecessors, (25604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 25604 transitions. [2021-07-13 19:18:55,676 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 25604 transitions. Word has length 22 [2021-07-13 19:18:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:55,676 INFO L482 AbstractCegarLoop]: Abstraction has 8633 states and 25604 transitions. [2021-07-13 19:18:55,676 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) [2021-07-13 19:18:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 25604 transitions. [2021-07-13 19:18:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:55,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:55,685 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:55,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-07-13 19:18:55,901 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:55,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1859354147, now seen corresponding path program 285 times [2021-07-13 19:18:55,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:55,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108577066] [2021-07-13 19:18:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:55,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108577066] [2021-07-13 19:18:55,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108577066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870160125] [2021-07-13 19:18:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:18:56,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:18:56,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:56,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870160125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:56,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:56,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-07-13 19:18:56,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335749073] [2021-07-13 19:18:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:56,052 INFO L87 Difference]: Start difference. First operand 8633 states and 25604 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) [2021-07-13 19:18:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:56,295 INFO L93 Difference]: Finished difference Result 8906 states and 25958 transitions. [2021-07-13 19:18:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:18:56,296 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 22 [2021-07-13 19:18:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:56,311 INFO L225 Difference]: With dead ends: 8906 [2021-07-13 19:18:56,311 INFO L226 Difference]: Without dead ends: 8900 [2021-07-13 19:18:56,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:18:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-07-13 19:18:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8631. [2021-07-13 19:18:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 2.9648899188876014) internal successors, (25587), 8630 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 25587 transitions. [2021-07-13 19:18:56,466 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 25587 transitions. Word has length 22 [2021-07-13 19:18:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:56,466 INFO L482 AbstractCegarLoop]: Abstraction has 8631 states and 25587 transitions. [2021-07-13 19:18:56,466 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) [2021-07-13 19:18:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 25587 transitions. [2021-07-13 19:18:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:56,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:56,475 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:56,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2998,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:56,688 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash -903090687, now seen corresponding path program 286 times [2021-07-13 19:18:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:56,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563578914] [2021-07-13 19:18:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:56,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:56,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563578914] [2021-07-13 19:18:56,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563578914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:56,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444494611] [2021-07-13 19:18:56,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:18:56,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:56,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:56,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444494611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:56,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:56,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-07-13 19:18:56,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564144984] [2021-07-13 19:18:56,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:56,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:56,845 INFO L87 Difference]: Start difference. First operand 8631 states and 25587 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) [2021-07-13 19:18:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:57,079 INFO L93 Difference]: Finished difference Result 9990 states and 29311 transitions. [2021-07-13 19:18:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:57,079 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 22 [2021-07-13 19:18:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:57,096 INFO L225 Difference]: With dead ends: 9990 [2021-07-13 19:18:57,097 INFO L226 Difference]: Without dead ends: 9990 [2021-07-13 19:18:57,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:18:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-07-13 19:18:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9751. [2021-07-13 19:18:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9751 states, 9750 states have (on average 2.9663589743589744) internal successors, (28922), 9750 states have internal predecessors, (28922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 28922 transitions. [2021-07-13 19:18:57,257 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 28922 transitions. Word has length 22 [2021-07-13 19:18:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:57,258 INFO L482 AbstractCegarLoop]: Abstraction has 9751 states and 28922 transitions. [2021-07-13 19:18:57,258 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) [2021-07-13 19:18:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 28922 transitions. [2021-07-13 19:18:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:57,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:57,269 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:57,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:57,485 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419431, now seen corresponding path program 287 times [2021-07-13 19:18:57,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:57,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486133762] [2021-07-13 19:18:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:57,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:57,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486133762] [2021-07-13 19:18:57,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486133762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:57,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940622590] [2021-07-13 19:18:57,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:18:57,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:18:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:57,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940622590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:57,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:57,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-13 19:18:57,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347285426] [2021-07-13 19:18:57,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:18:57,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:18:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:57,653 INFO L87 Difference]: Start difference. First operand 9751 states and 28922 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) [2021-07-13 19:18:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:58,045 INFO L93 Difference]: Finished difference Result 10086 states and 29515 transitions. [2021-07-13 19:18:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:18:58,045 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 22 [2021-07-13 19:18:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:58,061 INFO L225 Difference]: With dead ends: 10086 [2021-07-13 19:18:58,061 INFO L226 Difference]: Without dead ends: 10086 [2021-07-13 19:18:58,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:18:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-07-13 19:18:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9761. [2021-07-13 19:18:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 2.966393442622951) internal successors, (28952), 9760 states have internal predecessors, (28952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 28952 transitions. [2021-07-13 19:18:58,214 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 28952 transitions. Word has length 22 [2021-07-13 19:18:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:58,214 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 28952 transitions. [2021-07-13 19:18:58,214 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) [2021-07-13 19:18:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 28952 transitions. [2021-07-13 19:18:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:58,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:58,224 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:58,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3000,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:58,440 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1487952577, now seen corresponding path program 288 times [2021-07-13 19:18:58,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:58,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852076511] [2021-07-13 19:18:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:58,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:58,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852076511] [2021-07-13 19:18:58,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852076511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:58,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153832042] [2021-07-13 19:18:58,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:18:58,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:18:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153832042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:58,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:58,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-07-13 19:18:58,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491444472] [2021-07-13 19:18:58,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:18:58,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:18:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:58,615 INFO L87 Difference]: Start difference. First operand 9761 states and 28952 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) [2021-07-13 19:18:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:59,040 INFO L93 Difference]: Finished difference Result 11404 states and 33374 transitions. [2021-07-13 19:18:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:18:59,040 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 22 [2021-07-13 19:18:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:59,062 INFO L225 Difference]: With dead ends: 11404 [2021-07-13 19:18:59,062 INFO L226 Difference]: Without dead ends: 11404 [2021-07-13 19:18:59,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:18:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-07-13 19:18:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10779. [2021-07-13 19:18:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9689181666357394) internal successors, (31999), 10778 states have internal predecessors, (31999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31999 transitions. [2021-07-13 19:18:59,247 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31999 transitions. Word has length 22 [2021-07-13 19:18:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:59,247 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31999 transitions. [2021-07-13 19:18:59,247 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) [2021-07-13 19:18:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31999 transitions. [2021-07-13 19:18:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:18:59,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:59,257 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:59,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3001 [2021-07-13 19:18:59,458 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -53850265, now seen corresponding path program 289 times [2021-07-13 19:18:59,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:59,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624607794] [2021-07-13 19:18:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:59,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:59,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624607794] [2021-07-13 19:18:59,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624607794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:59,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967622428] [2021-07-13 19:18:59,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:18:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:18:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:59,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967622428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:59,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:59,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-07-13 19:18:59,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445928348] [2021-07-13 19:18:59,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:59,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:59,611 INFO L87 Difference]: Start difference. First operand 10779 states and 31999 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:59,845 INFO L93 Difference]: Finished difference Result 10976 states and 32234 transitions. [2021-07-13 19:18:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:18:59,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:18:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:59,865 INFO L225 Difference]: With dead ends: 10976 [2021-07-13 19:18:59,866 INFO L226 Difference]: Without dead ends: 10972 [2021-07-13 19:18:59,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:18:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-07-13 19:19:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10779. [2021-07-13 19:19:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9686398218593433) internal successors, (31996), 10778 states have internal predecessors, (31996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31996 transitions. [2021-07-13 19:19:00,045 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31996 transitions. Word has length 22 [2021-07-13 19:19:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:00,045 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31996 transitions. [2021-07-13 19:19:00,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31996 transitions. [2021-07-13 19:19:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:00,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:00,056 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:00,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:00,271 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450393, now seen corresponding path program 290 times [2021-07-13 19:19:00,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:00,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972784935] [2021-07-13 19:19:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:00,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972784935] [2021-07-13 19:19:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972784935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925141444] [2021-07-13 19:19:00,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:19:00,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:00,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925141444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:00,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:00,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-07-13 19:19:00,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722990948] [2021-07-13 19:19:00,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:19:00,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:00,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:19:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:00,455 INFO L87 Difference]: Start difference. First operand 10779 states and 31996 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:00,843 INFO L93 Difference]: Finished difference Result 13145 states and 38658 transitions. [2021-07-13 19:19:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:19:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:00,870 INFO L225 Difference]: With dead ends: 13145 [2021-07-13 19:19:00,870 INFO L226 Difference]: Without dead ends: 13145 [2021-07-13 19:19:00,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:19:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-07-13 19:19:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12431. [2021-07-13 19:19:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12431 states, 12430 states have (on average 2.9723250201126308) internal successors, (36946), 12430 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:01,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12431 states to 12431 states and 36946 transitions. [2021-07-13 19:19:01,093 INFO L78 Accepts]: Start accepts. Automaton has 12431 states and 36946 transitions. Word has length 22 [2021-07-13 19:19:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:01,094 INFO L482 AbstractCegarLoop]: Abstraction has 12431 states and 36946 transitions. [2021-07-13 19:19:01,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:01,094 INFO L276 IsEmpty]: Start isEmpty. Operand 12431 states and 36946 transitions. [2021-07-13 19:19:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:01,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:01,106 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:01,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3003,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:01,322 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash -808303197, now seen corresponding path program 291 times [2021-07-13 19:19:01,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:01,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308441334] [2021-07-13 19:19:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:01,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:01,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308441334] [2021-07-13 19:19:01,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308441334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:01,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670288210] [2021-07-13 19:19:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:01,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:19:01,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:01,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:01,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670288210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:01,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:01,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-07-13 19:19:01,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768802370] [2021-07-13 19:19:01,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:01,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:01,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:01,477 INFO L87 Difference]: Start difference. First operand 12431 states and 36946 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:01,769 INFO L93 Difference]: Finished difference Result 12636 states and 37217 transitions. [2021-07-13 19:19:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:19:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:01,791 INFO L225 Difference]: With dead ends: 12636 [2021-07-13 19:19:01,791 INFO L226 Difference]: Without dead ends: 12634 [2021-07-13 19:19:01,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12634 states. [2021-07-13 19:19:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12634 to 12451. [2021-07-13 19:19:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.972690763052209) internal successors, (37010), 12450 states have internal predecessors, (37010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 37010 transitions. [2021-07-13 19:19:02,004 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 37010 transitions. Word has length 22 [2021-07-13 19:19:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:02,004 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 37010 transitions. [2021-07-13 19:19:02,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 37010 transitions. [2021-07-13 19:19:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:02,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:02,016 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:02,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3004,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:02,231 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 909445863, now seen corresponding path program 292 times [2021-07-13 19:19:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:02,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444737827] [2021-07-13 19:19:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:02,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444737827] [2021-07-13 19:19:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444737827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987843244] [2021-07-13 19:19:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:19:02,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987843244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-07-13 19:19:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312089994] [2021-07-13 19:19:02,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:02,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:02,387 INFO L87 Difference]: Start difference. First operand 12451 states and 37010 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:02,605 INFO L93 Difference]: Finished difference Result 13016 states and 38296 transitions. [2021-07-13 19:19:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:02,630 INFO L225 Difference]: With dead ends: 13016 [2021-07-13 19:19:02,631 INFO L226 Difference]: Without dead ends: 13016 [2021-07-13 19:19:02,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2021-07-13 19:19:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 12452. [2021-07-13 19:19:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12452 states, 12451 states have (on average 2.9725323267207453) internal successors, (37011), 12451 states have internal predecessors, (37011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12452 states to 12452 states and 37011 transitions. [2021-07-13 19:19:02,838 INFO L78 Accepts]: Start accepts. Automaton has 12452 states and 37011 transitions. Word has length 22 [2021-07-13 19:19:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:02,838 INFO L482 AbstractCegarLoop]: Abstraction has 12452 states and 37011 transitions. [2021-07-13 19:19:02,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 12452 states and 37011 transitions. [2021-07-13 19:19:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:02,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:02,851 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:03,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:03,051 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash -819601471, now seen corresponding path program 293 times [2021-07-13 19:19:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:03,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661110753] [2021-07-13 19:19:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:03,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661110753] [2021-07-13 19:19:03,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661110753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38686230] [2021-07-13 19:19:03,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:03,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:19:03,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:03,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38686230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:03,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:03,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-07-13 19:19:03,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865810652] [2021-07-13 19:19:03,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:19:03,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:19:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:03,222 INFO L87 Difference]: Start difference. First operand 12452 states and 37011 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:03,472 INFO L93 Difference]: Finished difference Result 13404 states and 39370 transitions. [2021-07-13 19:19:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:19:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:03,498 INFO L225 Difference]: With dead ends: 13404 [2021-07-13 19:19:03,498 INFO L226 Difference]: Without dead ends: 13404 [2021-07-13 19:19:03,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:19:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2021-07-13 19:19:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12456. [2021-07-13 19:19:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12456 states, 12455 states have (on average 2.972380570052188) internal successors, (37021), 12455 states have internal predecessors, (37021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 37021 transitions. [2021-07-13 19:19:03,722 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 37021 transitions. Word has length 22 [2021-07-13 19:19:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:03,722 INFO L482 AbstractCegarLoop]: Abstraction has 12456 states and 37021 transitions. [2021-07-13 19:19:03,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 37021 transitions. [2021-07-13 19:19:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:03,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:03,734 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:03,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:03,949 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:03,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1414506023, now seen corresponding path program 294 times [2021-07-13 19:19:03,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:03,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772361768] [2021-07-13 19:19:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:04,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:04,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772361768] [2021-07-13 19:19:04,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772361768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:04,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854588247] [2021-07-13 19:19:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:04,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:19:04,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:04,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:04,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854588247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:04,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:04,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-07-13 19:19:04,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022070901] [2021-07-13 19:19:04,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:19:04,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:19:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:04,113 INFO L87 Difference]: Start difference. First operand 12456 states and 37021 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:04,442 INFO L93 Difference]: Finished difference Result 15061 states and 44163 transitions. [2021-07-13 19:19:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:19:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:04,474 INFO L225 Difference]: With dead ends: 15061 [2021-07-13 19:19:04,474 INFO L226 Difference]: Without dead ends: 15061 [2021-07-13 19:19:04,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:19:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-07-13 19:19:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 13737. [2021-07-13 19:19:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 2.9764123471170647) internal successors, (40884), 13736 states have internal predecessors, (40884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 40884 transitions. [2021-07-13 19:19:04,734 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 40884 transitions. Word has length 22 [2021-07-13 19:19:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:04,734 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 40884 transitions. [2021-07-13 19:19:04,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 40884 transitions. [2021-07-13 19:19:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:04,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:04,748 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:04,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:04,964 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1952361601, now seen corresponding path program 295 times [2021-07-13 19:19:04,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:04,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200462452] [2021-07-13 19:19:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:05,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:05,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200462452] [2021-07-13 19:19:05,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200462452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:05,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781671060] [2021-07-13 19:19:05,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:19:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:05,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781671060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:05,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:05,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-07-13 19:19:05,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057016055] [2021-07-13 19:19:05,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:19:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:05,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:19:05,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:05,158 INFO L87 Difference]: Start difference. First operand 13737 states and 40884 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:05,579 INFO L93 Difference]: Finished difference Result 14989 states and 43964 transitions. [2021-07-13 19:19:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:19:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:05,610 INFO L225 Difference]: With dead ends: 14989 [2021-07-13 19:19:05,610 INFO L226 Difference]: Without dead ends: 14989 [2021-07-13 19:19:05,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:19:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-07-13 19:19:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 13759. [2021-07-13 19:19:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13758 states have (on average 2.9763773804332025) internal successors, (40949), 13758 states have internal predecessors, (40949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 40949 transitions. [2021-07-13 19:19:05,858 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 40949 transitions. Word has length 22 [2021-07-13 19:19:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:05,858 INFO L482 AbstractCegarLoop]: Abstraction has 13759 states and 40949 transitions. [2021-07-13 19:19:05,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 40949 transitions. [2021-07-13 19:19:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:05,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:05,871 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:06,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3008 [2021-07-13 19:19:06,087 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1446015335, now seen corresponding path program 296 times [2021-07-13 19:19:06,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:06,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188638012] [2021-07-13 19:19:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:06,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:06,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188638012] [2021-07-13 19:19:06,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188638012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:06,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424333446] [2021-07-13 19:19:06,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:06,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:06,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424333446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:06,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:06,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-07-13 19:19:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114223661] [2021-07-13 19:19:06,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:19:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:19:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:06,258 INFO L87 Difference]: Start difference. First operand 13759 states and 40949 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:06,621 INFO L93 Difference]: Finished difference Result 17231 states and 50882 transitions. [2021-07-13 19:19:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:19:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:06,658 INFO L225 Difference]: With dead ends: 17231 [2021-07-13 19:19:06,658 INFO L226 Difference]: Without dead ends: 17231 [2021-07-13 19:19:06,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:19:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2021-07-13 19:19:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 16400. [2021-07-13 19:19:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16400 states, 16399 states have (on average 2.9804256357094947) internal successors, (48876), 16399 states have internal predecessors, (48876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 48876 transitions. [2021-07-13 19:19:06,970 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 48876 transitions. Word has length 22 [2021-07-13 19:19:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:06,970 INFO L482 AbstractCegarLoop]: Abstraction has 16400 states and 48876 transitions. [2021-07-13 19:19:06,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 48876 transitions. [2021-07-13 19:19:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:06,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:06,985 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:07,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3009 [2021-07-13 19:19:07,201 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1365817023, now seen corresponding path program 297 times [2021-07-13 19:19:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:07,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735546488] [2021-07-13 19:19:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:07,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:07,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735546488] [2021-07-13 19:19:07,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735546488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:07,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498403708] [2021-07-13 19:19:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:07,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:19:07,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:07,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498403708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:07,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:07,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-07-13 19:19:07,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085303074] [2021-07-13 19:19:07,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:19:07,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:07,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:19:07,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:07,387 INFO L87 Difference]: Start difference. First operand 16400 states and 48876 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:07,719 INFO L93 Difference]: Finished difference Result 17044 states and 50389 transitions. [2021-07-13 19:19:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:07,753 INFO L225 Difference]: With dead ends: 17044 [2021-07-13 19:19:07,753 INFO L226 Difference]: Without dead ends: 17044 [2021-07-13 19:19:07,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:19:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-07-13 19:19:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16341. [2021-07-13 19:19:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16341 states, 16340 states have (on average 2.980232558139535) internal successors, (48697), 16340 states have internal predecessors, (48697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16341 states to 16341 states and 48697 transitions. [2021-07-13 19:19:08,056 INFO L78 Accepts]: Start accepts. Automaton has 16341 states and 48697 transitions. Word has length 22 [2021-07-13 19:19:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:08,056 INFO L482 AbstractCegarLoop]: Abstraction has 16341 states and 48697 transitions. [2021-07-13 19:19:08,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16341 states and 48697 transitions. [2021-07-13 19:19:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:08,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:08,071 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:08,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3010,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:08,286 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1661693095, now seen corresponding path program 298 times [2021-07-13 19:19:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:08,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49463804] [2021-07-13 19:19:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:08,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:08,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49463804] [2021-07-13 19:19:08,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49463804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817316336] [2021-07-13 19:19:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:08,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:08,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817316336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:08,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-07-13 19:19:08,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853531847] [2021-07-13 19:19:08,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:19:08,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:19:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:08,469 INFO L87 Difference]: Start difference. First operand 16341 states and 48697 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:08,803 INFO L93 Difference]: Finished difference Result 18181 states and 53895 transitions. [2021-07-13 19:19:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:08,952 INFO L225 Difference]: With dead ends: 18181 [2021-07-13 19:19:08,952 INFO L226 Difference]: Without dead ends: 18181 [2021-07-13 19:19:08,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:19:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2021-07-13 19:19:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 17672. [2021-07-13 19:19:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17672 states, 17671 states have (on average 2.982287363476883) internal successors, (52700), 17671 states have internal predecessors, (52700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 52700 transitions. [2021-07-13 19:19:09,235 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 52700 transitions. Word has length 22 [2021-07-13 19:19:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:09,235 INFO L482 AbstractCegarLoop]: Abstraction has 17672 states and 52700 transitions. [2021-07-13 19:19:09,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 52700 transitions. [2021-07-13 19:19:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:09,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:09,253 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:09,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-07-13 19:19:09,469 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226241, now seen corresponding path program 299 times [2021-07-13 19:19:09,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:09,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872517218] [2021-07-13 19:19:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:09,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:09,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872517218] [2021-07-13 19:19:09,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872517218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:09,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392227534] [2021-07-13 19:19:09,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:09,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:19:09,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:09,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392227534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:09,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:09,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-07-13 19:19:09,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621995196] [2021-07-13 19:19:09,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:19:09,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:19:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:19:09,660 INFO L87 Difference]: Start difference. First operand 17672 states and 52700 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:10,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:10,017 INFO L93 Difference]: Finished difference Result 18327 states and 54324 transitions. [2021-07-13 19:19:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:19:10,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:10,056 INFO L225 Difference]: With dead ends: 18327 [2021-07-13 19:19:10,056 INFO L226 Difference]: Without dead ends: 18327 [2021-07-13 19:19:10,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:19:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-07-13 19:19:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 17682. [2021-07-13 19:19:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 2.982240823482835) internal successors, (52729), 17681 states have internal predecessors, (52729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 52729 transitions. [2021-07-13 19:19:10,391 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 52729 transitions. Word has length 22 [2021-07-13 19:19:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:10,391 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 52729 transitions. [2021-07-13 19:19:10,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 52729 transitions. [2021-07-13 19:19:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 19:19:10,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:10,407 INFO L508 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:10,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3012 [2021-07-13 19:19:10,623 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1525377049, now seen corresponding path program 300 times [2021-07-13 19:19:10,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:10,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887951964] [2021-07-13 19:19:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:10,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887951964] [2021-07-13 19:19:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887951964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082043328] [2021-07-13 19:19:10,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:10,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:19:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082043328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:10,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:10,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-13 19:19:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609602471] [2021-07-13 19:19:10,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:10,823 INFO L87 Difference]: Start difference. First operand 17682 states and 52729 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:11,331 INFO L93 Difference]: Finished difference Result 19601 states and 58121 transitions. [2021-07-13 19:19:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:19:11,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 19:19:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:11,374 INFO L225 Difference]: With dead ends: 19601 [2021-07-13 19:19:11,374 INFO L226 Difference]: Without dead ends: 19601 [2021-07-13 19:19:11,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:19:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-07-13 19:19:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 17866. [2021-07-13 19:19:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9824797089280715) internal successors, (53282), 17865 states have internal predecessors, (53282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 53282 transitions. [2021-07-13 19:19:11,721 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 53282 transitions. Word has length 22 [2021-07-13 19:19:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:11,721 INFO L482 AbstractCegarLoop]: Abstraction has 17866 states and 53282 transitions. [2021-07-13 19:19:11,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 53282 transitions. [2021-07-13 19:19:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:11,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:11,740 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:11,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:11,944 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:11,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:11,944 INFO L82 PathProgramCache]: Analyzing trace with hash -120035998, now seen corresponding path program 301 times [2021-07-13 19:19:11,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:11,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149731468] [2021-07-13 19:19:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:12,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:12,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149731468] [2021-07-13 19:19:12,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149731468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:12,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141779354] [2021-07-13 19:19:12,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:19:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:12,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141779354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:12,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:12,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 19:19:12,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759422230] [2021-07-13 19:19:12,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:12,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:12,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:12,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:12,086 INFO L87 Difference]: Start difference. First operand 17866 states and 53282 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:12,413 INFO L93 Difference]: Finished difference Result 18113 states and 53632 transitions. [2021-07-13 19:19:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:12,451 INFO L225 Difference]: With dead ends: 18113 [2021-07-13 19:19:12,451 INFO L226 Difference]: Without dead ends: 18109 [2021-07-13 19:19:12,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:19:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-07-13 19:19:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17844. [2021-07-13 19:19:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17844 states, 17843 states have (on average 2.981393263464664) internal successors, (53197), 17843 states have internal predecessors, (53197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 53197 transitions. [2021-07-13 19:19:12,798 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 53197 transitions. Word has length 23 [2021-07-13 19:19:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:12,798 INFO L482 AbstractCegarLoop]: Abstraction has 17844 states and 53197 transitions. [2021-07-13 19:19:12,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 53197 transitions. [2021-07-13 19:19:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:12,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:12,817 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:13,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:13,032 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1369368998, now seen corresponding path program 302 times [2021-07-13 19:19:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:13,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010779251] [2021-07-13 19:19:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010779251] [2021-07-13 19:19:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010779251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977221873] [2021-07-13 19:19:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:19:13,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:13,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977221873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:13,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:13,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:19:13,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206143201] [2021-07-13 19:19:13,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:13,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:13,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:13,151 INFO L87 Difference]: Start difference. First operand 17844 states and 53197 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:13,404 INFO L93 Difference]: Finished difference Result 18088 states and 53547 transitions. [2021-07-13 19:19:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:19:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:19:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:13,442 INFO L225 Difference]: With dead ends: 18088 [2021-07-13 19:19:13,442 INFO L226 Difference]: Without dead ends: 18082 [2021-07-13 19:19:13,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-07-13 19:19:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17833. [2021-07-13 19:19:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.980820995962315) internal successors, (53154), 17832 states have internal predecessors, (53154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53154 transitions. [2021-07-13 19:19:13,792 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53154 transitions. Word has length 23 [2021-07-13 19:19:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:13,792 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53154 transitions. [2021-07-13 19:19:13,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53154 transitions. [2021-07-13 19:19:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:13,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:13,811 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:14,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:14,025 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 296283618, now seen corresponding path program 303 times [2021-07-13 19:19:14,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:14,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263385681] [2021-07-13 19:19:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:14,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:14,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263385681] [2021-07-13 19:19:14,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263385681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:14,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110942100] [2021-07-13 19:19:14,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:14,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:19:14,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:14,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110942100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:14,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:14,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:19:14,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016779245] [2021-07-13 19:19:14,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:14,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:14,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:14,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:14,154 INFO L87 Difference]: Start difference. First operand 17833 states and 53154 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:14,403 INFO L93 Difference]: Finished difference Result 18081 states and 53510 transitions. [2021-07-13 19:19:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:19:14,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:14,442 INFO L225 Difference]: With dead ends: 18081 [2021-07-13 19:19:14,442 INFO L226 Difference]: Without dead ends: 18075 [2021-07-13 19:19:14,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:19:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-07-13 19:19:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17833. [2021-07-13 19:19:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.9803723642889186) internal successors, (53146), 17832 states have internal predecessors, (53146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53146 transitions. [2021-07-13 19:19:14,794 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53146 transitions. Word has length 23 [2021-07-13 19:19:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:14,794 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53146 transitions. [2021-07-13 19:19:14,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53146 transitions. [2021-07-13 19:19:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:14,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:14,813 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:15,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3016 [2021-07-13 19:19:15,029 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1390375206, now seen corresponding path program 304 times [2021-07-13 19:19:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:15,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525397046] [2021-07-13 19:19:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:15,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:15,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525397046] [2021-07-13 19:19:15,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525397046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:15,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12852766] [2021-07-13 19:19:15,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:15,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:15,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12852766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:15,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:15,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-13 19:19:15,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358522867] [2021-07-13 19:19:15,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:15,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:15,157 INFO L87 Difference]: Start difference. First operand 17833 states and 53146 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:15,484 INFO L93 Difference]: Finished difference Result 18366 states and 54302 transitions. [2021-07-13 19:19:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:15,522 INFO L225 Difference]: With dead ends: 18366 [2021-07-13 19:19:15,523 INFO L226 Difference]: Without dead ends: 18358 [2021-07-13 19:19:15,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18358 states. [2021-07-13 19:19:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18358 to 17840. [2021-07-13 19:19:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.98009978137788) internal successors, (53162), 17839 states have internal predecessors, (53162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53162 transitions. [2021-07-13 19:19:15,846 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53162 transitions. Word has length 23 [2021-07-13 19:19:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:15,846 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53162 transitions. [2021-07-13 19:19:15,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53162 transitions. [2021-07-13 19:19:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:15,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:15,863 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:16,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:16,077 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 900986926, now seen corresponding path program 305 times [2021-07-13 19:19:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:16,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333283354] [2021-07-13 19:19:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:16,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:16,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333283354] [2021-07-13 19:19:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333283354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:16,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222391835] [2021-07-13 19:19:16,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:16,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:19:16,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222391835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:16,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:16,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 19:19:16,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405468590] [2021-07-13 19:19:16,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:16,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:16,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:16,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:16,207 INFO L87 Difference]: Start difference. First operand 17840 states and 53162 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:16,444 INFO L93 Difference]: Finished difference Result 18066 states and 53531 transitions. [2021-07-13 19:19:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:16,479 INFO L225 Difference]: With dead ends: 18066 [2021-07-13 19:19:16,479 INFO L226 Difference]: Without dead ends: 18058 [2021-07-13 19:19:16,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2021-07-13 19:19:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17835. [2021-07-13 19:19:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17835 states, 17834 states have (on average 2.9798138387350006) internal successors, (53142), 17834 states have internal predecessors, (53142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17835 states to 17835 states and 53142 transitions. [2021-07-13 19:19:16,811 INFO L78 Accepts]: Start accepts. Automaton has 17835 states and 53142 transitions. Word has length 23 [2021-07-13 19:19:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:16,811 INFO L482 AbstractCegarLoop]: Abstraction has 17835 states and 53142 transitions. [2021-07-13 19:19:16,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:16,812 INFO L276 IsEmpty]: Start isEmpty. Operand 17835 states and 53142 transitions. [2021-07-13 19:19:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:16,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:16,830 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:17,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3018 [2021-07-13 19:19:17,045 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1037982158, now seen corresponding path program 306 times [2021-07-13 19:19:17,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:17,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599533699] [2021-07-13 19:19:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:17,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599533699] [2021-07-13 19:19:17,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599533699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:17,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455668356] [2021-07-13 19:19:17,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:17,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:19:17,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:17,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:17,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455668356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:17,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:17,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:19:17,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877520937] [2021-07-13 19:19:17,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:19:17,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:19:17,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:19:17,160 INFO L87 Difference]: Start difference. First operand 17835 states and 53142 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) [2021-07-13 19:19:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:17,291 INFO L93 Difference]: Finished difference Result 18191 states and 53712 transitions. [2021-07-13 19:19:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:19:17,292 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 23 [2021-07-13 19:19:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:17,330 INFO L225 Difference]: With dead ends: 18191 [2021-07-13 19:19:17,330 INFO L226 Difference]: Without dead ends: 18189 [2021-07-13 19:19:17,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18189 states. [2021-07-13 19:19:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18189 to 17847. [2021-07-13 19:19:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17847 states, 17846 states have (on average 2.979379132578729) internal successors, (53170), 17846 states have internal predecessors, (53170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17847 states to 17847 states and 53170 transitions. [2021-07-13 19:19:17,692 INFO L78 Accepts]: Start accepts. Automaton has 17847 states and 53170 transitions. Word has length 23 [2021-07-13 19:19:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:17,693 INFO L482 AbstractCegarLoop]: Abstraction has 17847 states and 53170 transitions. [2021-07-13 19:19:17,693 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) [2021-07-13 19:19:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17847 states and 53170 transitions. [2021-07-13 19:19:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:17,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:17,712 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:17,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3019,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:17,925 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash 707472532, now seen corresponding path program 307 times [2021-07-13 19:19:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:17,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505353153] [2021-07-13 19:19:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:17,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505353153] [2021-07-13 19:19:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505353153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239045276] [2021-07-13 19:19:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:19:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:17,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:18,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239045276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:18,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:18,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:19:18,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936330230] [2021-07-13 19:19:18,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:18,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:18,037 INFO L87 Difference]: Start difference. First operand 17847 states and 53170 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:18,203 INFO L93 Difference]: Finished difference Result 18272 states and 53872 transitions. [2021-07-13 19:19:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:18,242 INFO L225 Difference]: With dead ends: 18272 [2021-07-13 19:19:18,242 INFO L226 Difference]: Without dead ends: 18271 [2021-07-13 19:19:18,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-07-13 19:19:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 17840. [2021-07-13 19:19:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.9784180727619263) internal successors, (53132), 17839 states have internal predecessors, (53132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53132 transitions. [2021-07-13 19:19:18,704 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53132 transitions. Word has length 23 [2021-07-13 19:19:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:18,704 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53132 transitions. [2021-07-13 19:19:18,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53132 transitions. [2021-07-13 19:19:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:18,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:18,723 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:18,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-07-13 19:19:18,938 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1876881456, now seen corresponding path program 308 times [2021-07-13 19:19:18,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:18,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614510592] [2021-07-13 19:19:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:18,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:18,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614510592] [2021-07-13 19:19:18,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614510592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:18,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307543999] [2021-07-13 19:19:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:19,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:19,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:19,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:19,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:19,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307543999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:19,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:19,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-07-13 19:19:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089461126] [2021-07-13 19:19:19,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:19,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:19,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:19,052 INFO L87 Difference]: Start difference. First operand 17840 states and 53132 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:19,267 INFO L93 Difference]: Finished difference Result 18131 states and 53544 transitions. [2021-07-13 19:19:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:19,306 INFO L225 Difference]: With dead ends: 18131 [2021-07-13 19:19:19,306 INFO L226 Difference]: Without dead ends: 18126 [2021-07-13 19:19:19,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:19:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-07-13 19:19:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17829. [2021-07-13 19:19:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.976946376486426) internal successors, (53073), 17828 states have internal predecessors, (53073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53073 transitions. [2021-07-13 19:19:19,659 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53073 transitions. Word has length 23 [2021-07-13 19:19:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:19,659 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53073 transitions. [2021-07-13 19:19:19,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53073 transitions. [2021-07-13 19:19:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:19,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:19,678 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:19,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-07-13 19:19:19,893 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash -387476460, now seen corresponding path program 309 times [2021-07-13 19:19:19,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:19,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69891936] [2021-07-13 19:19:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:19,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:19,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69891936] [2021-07-13 19:19:19,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69891936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:19,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693331927] [2021-07-13 19:19:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:19,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:19:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:20,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693331927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:20,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:20,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:19:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81014729] [2021-07-13 19:19:20,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:20,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:20,015 INFO L87 Difference]: Start difference. First operand 17829 states and 53073 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:20,246 INFO L93 Difference]: Finished difference Result 18120 states and 53485 transitions. [2021-07-13 19:19:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:20,282 INFO L225 Difference]: With dead ends: 18120 [2021-07-13 19:19:20,282 INFO L226 Difference]: Without dead ends: 18110 [2021-07-13 19:19:20,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-07-13 19:19:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 17810. [2021-07-13 19:19:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17809 states have (on average 2.9759110562075355) internal successors, (52998), 17809 states have internal predecessors, (52998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 52998 transitions. [2021-07-13 19:19:20,631 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 52998 transitions. Word has length 23 [2021-07-13 19:19:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:20,631 INFO L482 AbstractCegarLoop]: Abstraction has 17810 states and 52998 transitions. [2021-07-13 19:19:20,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 52998 transitions. [2021-07-13 19:19:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:20,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:20,650 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:20,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3022,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:20,866 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1460561840, now seen corresponding path program 310 times [2021-07-13 19:19:20,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:20,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497140999] [2021-07-13 19:19:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:20,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:20,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497140999] [2021-07-13 19:19:20,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497140999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:20,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003392057] [2021-07-13 19:19:20,929 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 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 [2021-07-13 19:19:20,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:20,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:20,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:20,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003392057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:20,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:20,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 19:19:20,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9662879] [2021-07-13 19:19:20,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:20,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:20,993 INFO L87 Difference]: Start difference. First operand 17810 states and 52998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:21,203 INFO L93 Difference]: Finished difference Result 18994 states and 55842 transitions. [2021-07-13 19:19:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:19:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:19:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:21,241 INFO L225 Difference]: With dead ends: 18994 [2021-07-13 19:19:21,241 INFO L226 Difference]: Without dead ends: 18988 [2021-07-13 19:19:21,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:19:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-07-13 19:19:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 17829. [2021-07-13 19:19:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.9754319048687456) internal successors, (53046), 17828 states have internal predecessors, (53046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53046 transitions. [2021-07-13 19:19:21,669 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53046 transitions. Word has length 23 [2021-07-13 19:19:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:21,669 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53046 transitions. [2021-07-13 19:19:21,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53046 transitions. [2021-07-13 19:19:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:21,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:21,687 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:21,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-07-13 19:19:21,901 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -366470252, now seen corresponding path program 311 times [2021-07-13 19:19:21,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:21,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267315386] [2021-07-13 19:19:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:21,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:21,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267315386] [2021-07-13 19:19:21,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267315386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:21,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758242981] [2021-07-13 19:19:21,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:22,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:19:22,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:22,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:22,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758242981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:22,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:22,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:22,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360059013] [2021-07-13 19:19:22,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:22,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:22,038 INFO L87 Difference]: Start difference. First operand 17829 states and 53046 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:22,254 INFO L93 Difference]: Finished difference Result 19008 states and 55851 transitions. [2021-07-13 19:19:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:22,292 INFO L225 Difference]: With dead ends: 19008 [2021-07-13 19:19:22,292 INFO L226 Difference]: Without dead ends: 19000 [2021-07-13 19:19:22,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19000 states. [2021-07-13 19:19:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19000 to 17854. [2021-07-13 19:19:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.975354282193469) internal successors, (53119), 17853 states have internal predecessors, (53119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53119 transitions. [2021-07-13 19:19:22,628 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53119 transitions. Word has length 23 [2021-07-13 19:19:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:22,628 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53119 transitions. [2021-07-13 19:19:22,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53119 transitions. [2021-07-13 19:19:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:22,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:22,646 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:22,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:22,861 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -809369392, now seen corresponding path program 312 times [2021-07-13 19:19:22,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:22,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374159724] [2021-07-13 19:19:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:22,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374159724] [2021-07-13 19:19:22,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374159724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623985376] [2021-07-13 19:19:22,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:22,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:19:22,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:22,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:23,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623985376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:23,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:23,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:23,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806639314] [2021-07-13 19:19:23,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:23,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:23,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:23,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:23,027 INFO L87 Difference]: Start difference. First operand 17854 states and 53119 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:23,262 INFO L93 Difference]: Finished difference Result 18500 states and 54560 transitions. [2021-07-13 19:19:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:23,300 INFO L225 Difference]: With dead ends: 18500 [2021-07-13 19:19:23,300 INFO L226 Difference]: Without dead ends: 18490 [2021-07-13 19:19:23,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-07-13 19:19:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 17854. [2021-07-13 19:19:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.9751302302134097) internal successors, (53115), 17853 states have internal predecessors, (53115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53115 transitions. [2021-07-13 19:19:23,638 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53115 transitions. Word has length 23 [2021-07-13 19:19:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:23,638 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53115 transitions. [2021-07-13 19:19:23,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53115 transitions. [2021-07-13 19:19:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:23,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:23,657 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:23,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:23,872 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1196093342, now seen corresponding path program 313 times [2021-07-13 19:19:23,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:23,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315688043] [2021-07-13 19:19:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:23,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315688043] [2021-07-13 19:19:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315688043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161344361] [2021-07-13 19:19:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:23,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161344361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:23,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:23,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 19:19:23,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477886667] [2021-07-13 19:19:23,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:23,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:23,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:23,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:23,992 INFO L87 Difference]: Start difference. First operand 17854 states and 53115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:24,229 INFO L93 Difference]: Finished difference Result 18151 states and 53567 transitions. [2021-07-13 19:19:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:19:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:24,267 INFO L225 Difference]: With dead ends: 18151 [2021-07-13 19:19:24,268 INFO L226 Difference]: Without dead ends: 18139 [2021-07-13 19:19:24,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:19:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-07-13 19:19:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-07-13 19:19:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9742841100505335) internal successors, (52972), 17810 states have internal predecessors, (52972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52972 transitions. [2021-07-13 19:19:24,724 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52972 transitions. Word has length 23 [2021-07-13 19:19:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:24,724 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52972 transitions. [2021-07-13 19:19:24,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52972 transitions. [2021-07-13 19:19:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:24,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:24,743 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:24,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:24,958 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -102001754, now seen corresponding path program 314 times [2021-07-13 19:19:24,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:24,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777248266] [2021-07-13 19:19:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777248266] [2021-07-13 19:19:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777248266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570224557] [2021-07-13 19:19:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:19:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:25,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:25,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570224557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:25,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:25,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 19:19:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029285237] [2021-07-13 19:19:25,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:25,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:25,081 INFO L87 Difference]: Start difference. First operand 17811 states and 52972 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:25,292 INFO L93 Difference]: Finished difference Result 18119 states and 53440 transitions. [2021-07-13 19:19:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:25,325 INFO L225 Difference]: With dead ends: 18119 [2021-07-13 19:19:25,325 INFO L226 Difference]: Without dead ends: 18107 [2021-07-13 19:19:25,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18107 states. [2021-07-13 19:19:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18107 to 17779. [2021-07-13 19:19:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17779 states, 17778 states have (on average 2.9742940713241084) internal successors, (52877), 17778 states have internal predecessors, (52877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 52877 transitions. [2021-07-13 19:19:25,644 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 52877 transitions. Word has length 23 [2021-07-13 19:19:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:25,644 INFO L482 AbstractCegarLoop]: Abstraction has 17779 states and 52877 transitions. [2021-07-13 19:19:25,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 52877 transitions. [2021-07-13 19:19:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:25,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:25,661 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:25,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:25,877 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash -544900894, now seen corresponding path program 315 times [2021-07-13 19:19:25,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:25,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925441865] [2021-07-13 19:19:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:25,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925441865] [2021-07-13 19:19:25,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925441865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137402079] [2021-07-13 19:19:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:25,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:19:25,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:25,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:25,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:26,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137402079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:26,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:26,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:26,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963121328] [2021-07-13 19:19:26,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:26,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:26,001 INFO L87 Difference]: Start difference. First operand 17779 states and 52877 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:26,232 INFO L93 Difference]: Finished difference Result 18547 states and 54582 transitions. [2021-07-13 19:19:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:26,265 INFO L225 Difference]: With dead ends: 18547 [2021-07-13 19:19:26,266 INFO L226 Difference]: Without dead ends: 18532 [2021-07-13 19:19:26,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:19:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-07-13 19:19:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 17766. [2021-07-13 19:19:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17766 states, 17765 states have (on average 2.974838164931044) internal successors, (52848), 17765 states have internal predecessors, (52848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17766 states to 17766 states and 52848 transitions. [2021-07-13 19:19:26,569 INFO L78 Accepts]: Start accepts. Automaton has 17766 states and 52848 transitions. Word has length 23 [2021-07-13 19:19:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:26,569 INFO L482 AbstractCegarLoop]: Abstraction has 17766 states and 52848 transitions. [2021-07-13 19:19:26,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 17766 states and 52848 transitions. [2021-07-13 19:19:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:26,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:26,586 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:26,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:26,802 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:26,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1199463112, now seen corresponding path program 316 times [2021-07-13 19:19:26,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:26,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927954038] [2021-07-13 19:19:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:26,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927954038] [2021-07-13 19:19:26,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927954038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414215258] [2021-07-13 19:19:26,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:19:26,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:26,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:26,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414215258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:26,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:26,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:19:26,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652159964] [2021-07-13 19:19:26,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:26,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:26,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:26,936 INFO L87 Difference]: Start difference. First operand 17766 states and 52848 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) [2021-07-13 19:19:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:27,199 INFO L93 Difference]: Finished difference Result 18019 states and 53257 transitions. [2021-07-13 19:19:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:27,200 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 23 [2021-07-13 19:19:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:27,238 INFO L225 Difference]: With dead ends: 18019 [2021-07-13 19:19:27,238 INFO L226 Difference]: Without dead ends: 18009 [2021-07-13 19:19:27,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:19:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-07-13 19:19:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 17756. [2021-07-13 19:19:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9744297381019433) internal successors, (52811), 17755 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52811 transitions. [2021-07-13 19:19:27,693 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52811 transitions. Word has length 23 [2021-07-13 19:19:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:27,693 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52811 transitions. [2021-07-13 19:19:27,693 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) [2021-07-13 19:19:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52811 transitions. [2021-07-13 19:19:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:27,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:27,712 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:27,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:27,925 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash 334383492, now seen corresponding path program 317 times [2021-07-13 19:19:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:27,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488401343] [2021-07-13 19:19:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:27,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:27,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488401343] [2021-07-13 19:19:27,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488401343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:27,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777062901] [2021-07-13 19:19:27,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:27,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:19:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:28,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777062901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:28,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:28,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:19:28,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473733193] [2021-07-13 19:19:28,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:28,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:28,040 INFO L87 Difference]: Start difference. First operand 17756 states and 52811 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:28,178 INFO L93 Difference]: Finished difference Result 18147 states and 53443 transitions. [2021-07-13 19:19:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:19:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:28,212 INFO L225 Difference]: With dead ends: 18147 [2021-07-13 19:19:28,212 INFO L226 Difference]: Without dead ends: 18147 [2021-07-13 19:19:28,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-07-13 19:19:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 17763. [2021-07-13 19:19:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17763 states, 17762 states have (on average 2.9734827159103703) internal successors, (52815), 17762 states have internal predecessors, (52815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17763 states to 17763 states and 52815 transitions. [2021-07-13 19:19:28,564 INFO L78 Accepts]: Start accepts. Automaton has 17763 states and 52815 transitions. Word has length 23 [2021-07-13 19:19:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:28,565 INFO L482 AbstractCegarLoop]: Abstraction has 17763 states and 52815 transitions. [2021-07-13 19:19:28,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 17763 states and 52815 transitions. [2021-07-13 19:19:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:28,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:28,583 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:28,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-07-13 19:19:28,784 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -504515806, now seen corresponding path program 318 times [2021-07-13 19:19:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:28,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387584807] [2021-07-13 19:19:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:28,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:28,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387584807] [2021-07-13 19:19:28,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387584807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:28,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916596131] [2021-07-13 19:19:28,842 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 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 [2021-07-13 19:19:28,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:19:28,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:28,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916596131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:28,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:28,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:19:28,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279998347] [2021-07-13 19:19:28,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:28,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:28,904 INFO L87 Difference]: Start difference. First operand 17763 states and 52815 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:29,104 INFO L93 Difference]: Finished difference Result 18064 states and 53237 transitions. [2021-07-13 19:19:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:29,142 INFO L225 Difference]: With dead ends: 18064 [2021-07-13 19:19:29,142 INFO L226 Difference]: Without dead ends: 18059 [2021-07-13 19:19:29,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2021-07-13 19:19:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 17747. [2021-07-13 19:19:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17747 states, 17746 states have (on average 2.971599233630114) internal successors, (52734), 17746 states have internal predecessors, (52734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 52734 transitions. [2021-07-13 19:19:29,499 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 52734 transitions. Word has length 23 [2021-07-13 19:19:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:29,500 INFO L482 AbstractCegarLoop]: Abstraction has 17747 states and 52734 transitions. [2021-07-13 19:19:29,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 52734 transitions. [2021-07-13 19:19:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:29,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:29,519 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:29,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-07-13 19:19:29,733 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash 984889190, now seen corresponding path program 319 times [2021-07-13 19:19:29,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:29,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564139863] [2021-07-13 19:19:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:29,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:29,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564139863] [2021-07-13 19:19:29,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564139863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:29,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335747652] [2021-07-13 19:19:29,789 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 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 [2021-07-13 19:19:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:29,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335747652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:29,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:29,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:19:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647776959] [2021-07-13 19:19:29,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:29,853 INFO L87 Difference]: Start difference. First operand 17747 states and 52734 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:30,076 INFO L93 Difference]: Finished difference Result 18047 states and 53156 transitions. [2021-07-13 19:19:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:19:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:30,114 INFO L225 Difference]: With dead ends: 18047 [2021-07-13 19:19:30,114 INFO L226 Difference]: Without dead ends: 18039 [2021-07-13 19:19:30,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:19:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-07-13 19:19:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17721. [2021-07-13 19:19:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17721 states, 17720 states have (on average 2.970316027088036) internal successors, (52634), 17720 states have internal predecessors, (52634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52634 transitions. [2021-07-13 19:19:30,644 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52634 transitions. Word has length 23 [2021-07-13 19:19:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:30,644 INFO L482 AbstractCegarLoop]: Abstraction has 17721 states and 52634 transitions. [2021-07-13 19:19:30,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52634 transitions. [2021-07-13 19:19:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:30,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:30,663 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:30,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3032,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:30,879 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash -88196190, now seen corresponding path program 320 times [2021-07-13 19:19:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:30,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965015802] [2021-07-13 19:19:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:30,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:30,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965015802] [2021-07-13 19:19:30,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965015802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:30,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305171233] [2021-07-13 19:19:30,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:19:30,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:31,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305171233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:31,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:31,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-13 19:19:31,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270783111] [2021-07-13 19:19:31,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:31,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:31,002 INFO L87 Difference]: Start difference. First operand 17721 states and 52634 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:31,238 INFO L93 Difference]: Finished difference Result 18021 states and 53057 transitions. [2021-07-13 19:19:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:31,276 INFO L225 Difference]: With dead ends: 18021 [2021-07-13 19:19:31,277 INFO L226 Difference]: Without dead ends: 18012 [2021-07-13 19:19:31,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-07-13 19:19:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 17705. [2021-07-13 19:19:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9697808404880255) internal successors, (52577), 17704 states have internal predecessors, (52577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52577 transitions. [2021-07-13 19:19:31,771 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52577 transitions. Word has length 23 [2021-07-13 19:19:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:31,771 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52577 transitions. [2021-07-13 19:19:31,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52577 transitions. [2021-07-13 19:19:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:31,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:31,804 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:32,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-07-13 19:19:32,017 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1005895398, now seen corresponding path program 321 times [2021-07-13 19:19:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217776296] [2021-07-13 19:19:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:32,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:32,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217776296] [2021-07-13 19:19:32,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217776296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:32,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494777986] [2021-07-13 19:19:32,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:32,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:19:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:32,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:32,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:32,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494777986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:32,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:32,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:19:32,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533768975] [2021-07-13 19:19:32,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:32,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:32,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:32,203 INFO L87 Difference]: Start difference. First operand 17705 states and 52577 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:32,415 INFO L93 Difference]: Finished difference Result 19443 states and 56893 transitions. [2021-07-13 19:19:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:32,514 INFO L225 Difference]: With dead ends: 19443 [2021-07-13 19:19:32,514 INFO L226 Difference]: Without dead ends: 19435 [2021-07-13 19:19:32,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19435 states. [2021-07-13 19:19:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19435 to 17759. [2021-07-13 19:19:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17759 states, 17758 states have (on average 2.968802793107332) internal successors, (52720), 17758 states have internal predecessors, (52720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17759 states to 17759 states and 52720 transitions. [2021-07-13 19:19:32,890 INFO L78 Accepts]: Start accepts. Automaton has 17759 states and 52720 transitions. Word has length 23 [2021-07-13 19:19:32,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:32,890 INFO L482 AbstractCegarLoop]: Abstraction has 17759 states and 52720 transitions. [2021-07-13 19:19:32,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17759 states and 52720 transitions. [2021-07-13 19:19:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:32,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:32,907 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:33,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-07-13 19:19:33,122 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 562996258, now seen corresponding path program 322 times [2021-07-13 19:19:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:33,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754634084] [2021-07-13 19:19:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:33,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754634084] [2021-07-13 19:19:33,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754634084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510028906] [2021-07-13 19:19:33,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:19:33,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:33,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510028906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:33,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:33,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:19:33,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913865059] [2021-07-13 19:19:33,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:33,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:33,344 INFO L87 Difference]: Start difference. First operand 17759 states and 52720 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) [2021-07-13 19:19:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:33,589 INFO L93 Difference]: Finished difference Result 19462 states and 56909 transitions. [2021-07-13 19:19:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:33,590 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 23 [2021-07-13 19:19:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:33,710 INFO L225 Difference]: With dead ends: 19462 [2021-07-13 19:19:33,710 INFO L226 Difference]: Without dead ends: 19452 [2021-07-13 19:19:33,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:19:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2021-07-13 19:19:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 17815. [2021-07-13 19:19:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967778152015269) internal successors, (52868), 17814 states have internal predecessors, (52868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52868 transitions. [2021-07-13 19:19:34,087 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52868 transitions. Word has length 23 [2021-07-13 19:19:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:34,087 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52868 transitions. [2021-07-13 19:19:34,088 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) [2021-07-13 19:19:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52868 transitions. [2021-07-13 19:19:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:34,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:34,106 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:34,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:34,317 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash -281975194, now seen corresponding path program 323 times [2021-07-13 19:19:34,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:34,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828765509] [2021-07-13 19:19:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:34,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828765509] [2021-07-13 19:19:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828765509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356273168] [2021-07-13 19:19:34,402 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 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 [2021-07-13 19:19:34,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:19:34,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:34,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:34,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356273168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:34,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:34,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:19:34,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847853367] [2021-07-13 19:19:34,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:34,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:34,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:34,530 INFO L87 Difference]: Start difference. First operand 17815 states and 52868 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) [2021-07-13 19:19:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:34,853 INFO L93 Difference]: Finished difference Result 18858 states and 55259 transitions. [2021-07-13 19:19:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:19:34,853 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 23 [2021-07-13 19:19:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:34,886 INFO L225 Difference]: With dead ends: 18858 [2021-07-13 19:19:34,886 INFO L226 Difference]: Without dead ends: 18846 [2021-07-13 19:19:34,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:19:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2021-07-13 19:19:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 17815. [2021-07-13 19:19:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967497473896935) internal successors, (52863), 17814 states have internal predecessors, (52863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52863 transitions. [2021-07-13 19:19:35,247 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52863 transitions. Word has length 23 [2021-07-13 19:19:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:35,247 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52863 transitions. [2021-07-13 19:19:35,247 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) [2021-07-13 19:19:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52863 transitions. [2021-07-13 19:19:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:35,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:35,266 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:35,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:35,482 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 614484244, now seen corresponding path program 324 times [2021-07-13 19:19:35,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:35,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685063375] [2021-07-13 19:19:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:35,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685063375] [2021-07-13 19:19:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685063375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928713411] [2021-07-13 19:19:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:35,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:19:35,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:35,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928713411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:35,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:35,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463187436] [2021-07-13 19:19:35,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:35,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:35,618 INFO L87 Difference]: Start difference. First operand 17815 states and 52863 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:35,970 INFO L93 Difference]: Finished difference Result 18134 states and 53387 transitions. [2021-07-13 19:19:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:36,011 INFO L225 Difference]: With dead ends: 18134 [2021-07-13 19:19:36,011 INFO L226 Difference]: Without dead ends: 18122 [2021-07-13 19:19:36,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2021-07-13 19:19:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 17754. [2021-07-13 19:19:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 17753 states have (on average 2.9667661803638823) internal successors, (52669), 17753 states have internal predecessors, (52669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 52669 transitions. [2021-07-13 19:19:36,537 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 52669 transitions. Word has length 23 [2021-07-13 19:19:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:36,537 INFO L482 AbstractCegarLoop]: Abstraction has 17754 states and 52669 transitions. [2021-07-13 19:19:36,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 52669 transitions. [2021-07-13 19:19:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:36,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:36,555 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:36,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3037 [2021-07-13 19:19:36,771 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash 171585104, now seen corresponding path program 325 times [2021-07-13 19:19:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:36,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530677188] [2021-07-13 19:19:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:36,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:36,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530677188] [2021-07-13 19:19:36,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530677188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:36,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305432454] [2021-07-13 19:19:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:19:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:36,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305432454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:36,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:36,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 19:19:36,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773010539] [2021-07-13 19:19:36,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:36,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:36,908 INFO L87 Difference]: Start difference. First operand 17754 states and 52669 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) [2021-07-13 19:19:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:37,219 INFO L93 Difference]: Finished difference Result 18086 states and 53214 transitions. [2021-07-13 19:19:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:37,220 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 23 [2021-07-13 19:19:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:37,256 INFO L225 Difference]: With dead ends: 18086 [2021-07-13 19:19:37,256 INFO L226 Difference]: Without dead ends: 18076 [2021-07-13 19:19:37,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:37,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18076 states. [2021-07-13 19:19:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18076 to 17750. [2021-07-13 19:19:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17750 states, 17749 states have (on average 2.966476984618852) internal successors, (52652), 17749 states have internal predecessors, (52652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 52652 transitions. [2021-07-13 19:19:37,679 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 52652 transitions. Word has length 23 [2021-07-13 19:19:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:37,679 INFO L482 AbstractCegarLoop]: Abstraction has 17750 states and 52652 transitions. [2021-07-13 19:19:37,679 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) [2021-07-13 19:19:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 52652 transitions. [2021-07-13 19:19:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:37,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:37,698 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:37,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3038,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:37,913 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -673386348, now seen corresponding path program 326 times [2021-07-13 19:19:37,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:37,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732897755] [2021-07-13 19:19:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:38,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:38,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732897755] [2021-07-13 19:19:38,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732897755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:38,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690419479] [2021-07-13 19:19:38,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:19:38,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:38,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690419479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:38,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 19:19:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949807867] [2021-07-13 19:19:38,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:38,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:38,106 INFO L87 Difference]: Start difference. First operand 17750 states and 52652 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) [2021-07-13 19:19:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:38,515 INFO L93 Difference]: Finished difference Result 18572 states and 54522 transitions. [2021-07-13 19:19:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:19:38,516 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 23 [2021-07-13 19:19:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:38,554 INFO L225 Difference]: With dead ends: 18572 [2021-07-13 19:19:38,554 INFO L226 Difference]: Without dead ends: 18560 [2021-07-13 19:19:38,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:19:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-07-13 19:19:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 17743. [2021-07-13 19:19:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966463758313606) internal successors, (52631), 17742 states have internal predecessors, (52631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52631 transitions. [2021-07-13 19:19:38,959 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52631 transitions. Word has length 23 [2021-07-13 19:19:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:38,959 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52631 transitions. [2021-07-13 19:19:38,959 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) [2021-07-13 19:19:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52631 transitions. [2021-07-13 19:19:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:38,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:38,978 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:39,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:39,194 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:39,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1862290286, now seen corresponding path program 327 times [2021-07-13 19:19:39,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:39,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830815197] [2021-07-13 19:19:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:39,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:39,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830815197] [2021-07-13 19:19:39,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830815197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:39,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033906034] [2021-07-13 19:19:39,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:39,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:19:39,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:39,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033906034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:39,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:39,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:19:39,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680589790] [2021-07-13 19:19:39,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:39,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:39,338 INFO L87 Difference]: Start difference. First operand 17743 states and 52631 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) [2021-07-13 19:19:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:39,717 INFO L93 Difference]: Finished difference Result 19073 states and 55761 transitions. [2021-07-13 19:19:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:39,717 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 23 [2021-07-13 19:19:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:39,757 INFO L225 Difference]: With dead ends: 19073 [2021-07-13 19:19:39,757 INFO L226 Difference]: Without dead ends: 19061 [2021-07-13 19:19:39,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-07-13 19:19:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 17743. [2021-07-13 19:19:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966294668019389) internal successors, (52628), 17742 states have internal predecessors, (52628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52628 transitions. [2021-07-13 19:19:40,192 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52628 transitions. Word has length 23 [2021-07-13 19:19:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:40,192 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52628 transitions. [2021-07-13 19:19:40,192 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) [2021-07-13 19:19:40,192 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52628 transitions. [2021-07-13 19:19:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:40,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:40,209 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:40,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-07-13 19:19:40,425 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash -71954318, now seen corresponding path program 328 times [2021-07-13 19:19:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:40,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839790368] [2021-07-13 19:19:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:40,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:40,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839790368] [2021-07-13 19:19:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839790368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:40,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308893080] [2021-07-13 19:19:40,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:19:40,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:40,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:40,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:40,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308893080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:40,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:40,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:19:40,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643597588] [2021-07-13 19:19:40,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:19:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:40,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:19:40,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:19:40,550 INFO L87 Difference]: Start difference. First operand 17743 states and 52628 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) [2021-07-13 19:19:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:40,684 INFO L93 Difference]: Finished difference Result 18066 states and 53107 transitions. [2021-07-13 19:19:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:19:40,684 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 23 [2021-07-13 19:19:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:40,723 INFO L225 Difference]: With dead ends: 18066 [2021-07-13 19:19:40,723 INFO L226 Difference]: Without dead ends: 18064 [2021-07-13 19:19:40,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18064 states. [2021-07-13 19:19:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18064 to 17735. [2021-07-13 19:19:41,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17735 states, 17734 states have (on average 2.966110296605391) internal successors, (52601), 17734 states have internal predecessors, (52601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 52601 transitions. [2021-07-13 19:19:41,189 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 52601 transitions. Word has length 23 [2021-07-13 19:19:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:41,189 INFO L482 AbstractCegarLoop]: Abstraction has 17735 states and 52601 transitions. [2021-07-13 19:19:41,189 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) [2021-07-13 19:19:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 52601 transitions. [2021-07-13 19:19:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:41,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:41,208 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:41,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-07-13 19:19:41,423 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1673500372, now seen corresponding path program 329 times [2021-07-13 19:19:41,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:41,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491489317] [2021-07-13 19:19:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:41,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491489317] [2021-07-13 19:19:41,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491489317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:41,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318554532] [2021-07-13 19:19:41,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:41,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:19:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318554532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:41,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:41,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:19:41,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019729311] [2021-07-13 19:19:41,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:41,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:41,674 INFO L87 Difference]: Start difference. First operand 17735 states and 52601 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:41,802 INFO L93 Difference]: Finished difference Result 18041 states and 53023 transitions. [2021-07-13 19:19:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:19:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:41,840 INFO L225 Difference]: With dead ends: 18041 [2021-07-13 19:19:41,841 INFO L226 Difference]: Without dead ends: 18041 [2021-07-13 19:19:41,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-07-13 19:19:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 17719. [2021-07-13 19:19:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17719 states, 17718 states have (on average 2.9652895360650184) internal successors, (52539), 17718 states have internal predecessors, (52539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17719 states to 17719 states and 52539 transitions. [2021-07-13 19:19:42,259 INFO L78 Accepts]: Start accepts. Automaton has 17719 states and 52539 transitions. Word has length 23 [2021-07-13 19:19:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:42,259 INFO L482 AbstractCegarLoop]: Abstraction has 17719 states and 52539 transitions. [2021-07-13 19:19:42,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 17719 states and 52539 transitions. [2021-07-13 19:19:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:42,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:42,278 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:42,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3042 [2021-07-13 19:19:42,494 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:42,494 INFO L82 PathProgramCache]: Analyzing trace with hash -910853616, now seen corresponding path program 330 times [2021-07-13 19:19:42,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:42,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015968729] [2021-07-13 19:19:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:42,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:42,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015968729] [2021-07-13 19:19:42,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015968729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:42,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900602350] [2021-07-13 19:19:42,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:42,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:19:42,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900602350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:42,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:42,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:19:42,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774134612] [2021-07-13 19:19:42,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:42,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:42,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:42,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:42,611 INFO L87 Difference]: Start difference. First operand 17719 states and 52539 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:42,934 INFO L93 Difference]: Finished difference Result 18030 states and 52973 transitions. [2021-07-13 19:19:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:19:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:42,968 INFO L225 Difference]: With dead ends: 18030 [2021-07-13 19:19:42,968 INFO L226 Difference]: Without dead ends: 18027 [2021-07-13 19:19:42,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:19:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-07-13 19:19:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17710. [2021-07-13 19:19:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.963973121011915) internal successors, (52489), 17709 states have internal predecessors, (52489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52489 transitions. [2021-07-13 19:19:43,507 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52489 transitions. Word has length 23 [2021-07-13 19:19:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:43,508 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52489 transitions. [2021-07-13 19:19:43,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52489 transitions. [2021-07-13 19:19:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:43,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:43,524 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:43,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-07-13 19:19:43,740 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 578551380, now seen corresponding path program 331 times [2021-07-13 19:19:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:43,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877595488] [2021-07-13 19:19:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:43,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877595488] [2021-07-13 19:19:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877595488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678414136] [2021-07-13 19:19:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:19:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:43,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678414136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:43,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:43,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 19:19:43,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649777288] [2021-07-13 19:19:43,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:43,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:43,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:43,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:43,861 INFO L87 Difference]: Start difference. First operand 17710 states and 52489 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:44,085 INFO L93 Difference]: Finished difference Result 18025 states and 52930 transitions. [2021-07-13 19:19:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:19:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:44,121 INFO L225 Difference]: With dead ends: 18025 [2021-07-13 19:19:44,121 INFO L226 Difference]: Without dead ends: 18021 [2021-07-13 19:19:44,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:19:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-07-13 19:19:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17710. [2021-07-13 19:19:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.9626178779151844) internal successors, (52465), 17709 states have internal predecessors, (52465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52465 transitions. [2021-07-13 19:19:44,519 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52465 transitions. Word has length 23 [2021-07-13 19:19:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:44,519 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52465 transitions. [2021-07-13 19:19:44,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52465 transitions. [2021-07-13 19:19:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:44,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:44,538 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:44,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-07-13 19:19:44,754 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash -494534000, now seen corresponding path program 332 times [2021-07-13 19:19:44,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:44,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272155308] [2021-07-13 19:19:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:44,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:44,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272155308] [2021-07-13 19:19:44,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272155308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:44,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86221927] [2021-07-13 19:19:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:19:44,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:44,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86221927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:44,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 19:19:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403741827] [2021-07-13 19:19:44,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:44,873 INFO L87 Difference]: Start difference. First operand 17710 states and 52465 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:45,151 INFO L93 Difference]: Finished difference Result 20107 states and 58655 transitions. [2021-07-13 19:19:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:19:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:19:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:45,191 INFO L225 Difference]: With dead ends: 20107 [2021-07-13 19:19:45,191 INFO L226 Difference]: Without dead ends: 20101 [2021-07-13 19:19:45,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:19:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-07-13 19:19:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 17710. [2021-07-13 19:19:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.962222598678638) internal successors, (52458), 17709 states have internal predecessors, (52458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52458 transitions. [2021-07-13 19:19:45,675 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52458 transitions. Word has length 23 [2021-07-13 19:19:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:45,675 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52458 transitions. [2021-07-13 19:19:45,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:19:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52458 transitions. [2021-07-13 19:19:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:45,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:45,694 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:45,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-07-13 19:19:45,909 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash 599557588, now seen corresponding path program 333 times [2021-07-13 19:19:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666855495] [2021-07-13 19:19:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:45,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:45,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666855495] [2021-07-13 19:19:45,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666855495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:45,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905476907] [2021-07-13 19:19:45,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:46,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:19:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:46,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905476907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:46,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:46,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:46,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518822936] [2021-07-13 19:19:46,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:46,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:46,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:46,055 INFO L87 Difference]: Start difference. First operand 17710 states and 52458 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:46,301 INFO L93 Difference]: Finished difference Result 20128 states and 58673 transitions. [2021-07-13 19:19:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:46,348 INFO L225 Difference]: With dead ends: 20128 [2021-07-13 19:19:46,348 INFO L226 Difference]: Without dead ends: 20120 [2021-07-13 19:19:46,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-07-13 19:19:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 17811. [2021-07-13 19:19:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9632229084783828) internal successors, (52775), 17810 states have internal predecessors, (52775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52775 transitions. [2021-07-13 19:19:46,852 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52775 transitions. Word has length 23 [2021-07-13 19:19:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:46,852 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52775 transitions. [2021-07-13 19:19:46,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52775 transitions. [2021-07-13 19:19:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:46,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:46,870 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:47,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:47,086 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:47,086 INFO L82 PathProgramCache]: Analyzing trace with hash 156658448, now seen corresponding path program 334 times [2021-07-13 19:19:47,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:47,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962499085] [2021-07-13 19:19:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:47,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:47,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962499085] [2021-07-13 19:19:47,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962499085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:47,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502028689] [2021-07-13 19:19:47,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:19:47,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:47,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:47,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502028689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:47,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:47,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 19:19:47,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064229746] [2021-07-13 19:19:47,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:47,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:47,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:47,216 INFO L87 Difference]: Start difference. First operand 17811 states and 52775 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:47,555 INFO L93 Difference]: Finished difference Result 19877 states and 57902 transitions. [2021-07-13 19:19:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:47,589 INFO L225 Difference]: With dead ends: 19877 [2021-07-13 19:19:47,589 INFO L226 Difference]: Without dead ends: 19867 [2021-07-13 19:19:47,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2021-07-13 19:19:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 17811. [2021-07-13 19:19:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.963054463784391) internal successors, (52772), 17810 states have internal predecessors, (52772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52772 transitions. [2021-07-13 19:19:47,904 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52772 transitions. Word has length 23 [2021-07-13 19:19:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:47,904 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52772 transitions. [2021-07-13 19:19:47,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52772 transitions. [2021-07-13 19:19:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:47,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:47,923 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:48,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:48,138 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -688313004, now seen corresponding path program 335 times [2021-07-13 19:19:48,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:48,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700409824] [2021-07-13 19:19:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:48,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700409824] [2021-07-13 19:19:48,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700409824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199538600] [2021-07-13 19:19:48,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:19:48,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:19:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:48,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:48,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199538600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:48,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:48,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:19:48,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668951764] [2021-07-13 19:19:48,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:48,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:48,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:48,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:48,365 INFO L87 Difference]: Start difference. First operand 17811 states and 52772 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) [2021-07-13 19:19:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:48,632 INFO L93 Difference]: Finished difference Result 19900 states and 57925 transitions. [2021-07-13 19:19:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:48,632 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 23 [2021-07-13 19:19:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:48,671 INFO L225 Difference]: With dead ends: 19900 [2021-07-13 19:19:48,671 INFO L226 Difference]: Without dead ends: 19888 [2021-07-13 19:19:48,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:19:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19888 states. [2021-07-13 19:19:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19888 to 17820. [2021-07-13 19:19:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9629047645771367) internal successors, (52796), 17819 states have internal predecessors, (52796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52796 transitions. [2021-07-13 19:19:49,067 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52796 transitions. Word has length 23 [2021-07-13 19:19:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:49,068 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52796 transitions. [2021-07-13 19:19:49,068 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) [2021-07-13 19:19:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52796 transitions. [2021-07-13 19:19:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:49,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:49,086 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:49,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:49,301 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1112624240, now seen corresponding path program 336 times [2021-07-13 19:19:49,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:49,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588967461] [2021-07-13 19:19:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:49,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588967461] [2021-07-13 19:19:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588967461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:49,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938770209] [2021-07-13 19:19:49,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:49,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:19:49,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:49,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:49,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938770209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:49,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:49,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:19:49,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141772967] [2021-07-13 19:19:49,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:49,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:49,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:49,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:49,451 INFO L87 Difference]: Start difference. First operand 17820 states and 52796 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) [2021-07-13 19:19:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:49,810 INFO L93 Difference]: Finished difference Result 18844 states and 55132 transitions. [2021-07-13 19:19:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:19:49,810 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 23 [2021-07-13 19:19:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:49,848 INFO L225 Difference]: With dead ends: 18844 [2021-07-13 19:19:49,848 INFO L226 Difference]: Without dead ends: 18830 [2021-07-13 19:19:49,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:19:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-07-13 19:19:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 17820. [2021-07-13 19:19:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9627925248330436) internal successors, (52794), 17819 states have internal predecessors, (52794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52794 transitions. [2021-07-13 19:19:50,232 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52794 transitions. Word has length 23 [2021-07-13 19:19:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:50,232 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52794 transitions. [2021-07-13 19:19:50,233 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) [2021-07-13 19:19:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52794 transitions. [2021-07-13 19:19:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:50,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:50,252 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:50,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3049 [2021-07-13 19:19:50,468 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1769822746, now seen corresponding path program 337 times [2021-07-13 19:19:50,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:50,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016316430] [2021-07-13 19:19:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:50,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:50,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016316430] [2021-07-13 19:19:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016316430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:50,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313842462] [2021-07-13 19:19:50,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:50,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313842462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:50,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:50,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220981340] [2021-07-13 19:19:50,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:50,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:50,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:50,606 INFO L87 Difference]: Start difference. First operand 17820 states and 52794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:50,920 INFO L93 Difference]: Finished difference Result 17961 states and 52999 transitions. [2021-07-13 19:19:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:50,953 INFO L225 Difference]: With dead ends: 17961 [2021-07-13 19:19:50,953 INFO L226 Difference]: Without dead ends: 17955 [2021-07-13 19:19:50,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:19:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2021-07-13 19:19:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 17760. [2021-07-13 19:19:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17760 states, 17759 states have (on average 2.962160031533307) internal successors, (52605), 17759 states have internal predecessors, (52605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 52605 transitions. [2021-07-13 19:19:51,262 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 52605 transitions. Word has length 23 [2021-07-13 19:19:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:51,262 INFO L482 AbstractCegarLoop]: Abstraction has 17760 states and 52605 transitions. [2021-07-13 19:19:51,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 52605 transitions. [2021-07-13 19:19:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:51,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:51,281 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:51,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-07-13 19:19:51,497 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1074657958, now seen corresponding path program 338 times [2021-07-13 19:19:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:51,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478131069] [2021-07-13 19:19:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:51,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478131069] [2021-07-13 19:19:51,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478131069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596489525] [2021-07-13 19:19:51,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:51,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:51,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:51,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596489525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:51,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:51,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 19:19:51,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504250208] [2021-07-13 19:19:51,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:51,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:51,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:51,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:51,643 INFO L87 Difference]: Start difference. First operand 17760 states and 52605 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) [2021-07-13 19:19:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:51,968 INFO L93 Difference]: Finished difference Result 18138 states and 53420 transitions. [2021-07-13 19:19:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:51,968 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 23 [2021-07-13 19:19:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:52,003 INFO L225 Difference]: With dead ends: 18138 [2021-07-13 19:19:52,003 INFO L226 Difference]: Without dead ends: 18126 [2021-07-13 19:19:52,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-07-13 19:19:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17755. [2021-07-13 19:19:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17755 states, 17754 states have (on average 2.9613608200968797) internal successors, (52576), 17754 states have internal predecessors, (52576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17755 states to 17755 states and 52576 transitions. [2021-07-13 19:19:52,336 INFO L78 Accepts]: Start accepts. Automaton has 17755 states and 52576 transitions. Word has length 23 [2021-07-13 19:19:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:52,336 INFO L482 AbstractCegarLoop]: Abstraction has 17755 states and 52576 transitions. [2021-07-13 19:19:52,336 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) [2021-07-13 19:19:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 17755 states and 52576 transitions. [2021-07-13 19:19:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:52,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:52,485 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:52,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-07-13 19:19:52,701 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1282166328, now seen corresponding path program 339 times [2021-07-13 19:19:52,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:52,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59416599] [2021-07-13 19:19:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:52,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:52,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59416599] [2021-07-13 19:19:52,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59416599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:52,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859416447] [2021-07-13 19:19:52,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:52,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:19:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:52,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859416447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:52,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:52,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:19:52,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376923509] [2021-07-13 19:19:52,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:52,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:52,823 INFO L87 Difference]: Start difference. First operand 17755 states and 52576 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:53,023 INFO L93 Difference]: Finished difference Result 18122 states and 53190 transitions. [2021-07-13 19:19:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:19:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:19:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:53,057 INFO L225 Difference]: With dead ends: 18122 [2021-07-13 19:19:53,057 INFO L226 Difference]: Without dead ends: 18113 [2021-07-13 19:19:53,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:19:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2021-07-13 19:19:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17738. [2021-07-13 19:19:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17738 states, 17737 states have (on average 2.960139820713762) internal successors, (52504), 17737 states have internal predecessors, (52504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52504 transitions. [2021-07-13 19:19:53,511 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52504 transitions. Word has length 23 [2021-07-13 19:19:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:53,512 INFO L482 AbstractCegarLoop]: Abstraction has 17738 states and 52504 transitions. [2021-07-13 19:19:53,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52504 transitions. [2021-07-13 19:19:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:53,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:53,531 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:53,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-07-13 19:19:53,742 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash -188074740, now seen corresponding path program 340 times [2021-07-13 19:19:53,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:53,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112815656] [2021-07-13 19:19:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:53,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:53,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112815656] [2021-07-13 19:19:53,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112815656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:53,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799754166] [2021-07-13 19:19:53,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:19:53,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:53,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:53,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799754166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:53,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:53,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 19:19:53,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373964110] [2021-07-13 19:19:53,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:53,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:53,877 INFO L87 Difference]: Start difference. First operand 17738 states and 52504 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:54,112 INFO L93 Difference]: Finished difference Result 18117 states and 53136 transitions. [2021-07-13 19:19:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:19:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:54,150 INFO L225 Difference]: With dead ends: 18117 [2021-07-13 19:19:54,150 INFO L226 Difference]: Without dead ends: 18109 [2021-07-13 19:19:54,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-07-13 19:19:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17756. [2021-07-13 19:19:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9588848211771333) internal successors, (52535), 17755 states have internal predecessors, (52535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52535 transitions. [2021-07-13 19:19:54,593 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52535 transitions. Word has length 23 [2021-07-13 19:19:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:54,594 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52535 transitions. [2021-07-13 19:19:54,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52535 transitions. [2021-07-13 19:19:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:54,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:54,613 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:54,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3053,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:54,819 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash -630973880, now seen corresponding path program 341 times [2021-07-13 19:19:54,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:54,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737654283] [2021-07-13 19:19:54,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:54,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:54,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737654283] [2021-07-13 19:19:54,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737654283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:54,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929087531] [2021-07-13 19:19:54,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:54,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:19:54,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:54,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929087531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:54,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:54,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 19:19:54,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601512359] [2021-07-13 19:19:54,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:54,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:54,964 INFO L87 Difference]: Start difference. First operand 17756 states and 52535 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:55,203 INFO L93 Difference]: Finished difference Result 19811 states and 57453 transitions. [2021-07-13 19:19:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:19:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:55,246 INFO L225 Difference]: With dead ends: 19811 [2021-07-13 19:19:55,246 INFO L226 Difference]: Without dead ends: 19801 [2021-07-13 19:19:55,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-07-13 19:19:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17805. [2021-07-13 19:19:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17805 states, 17804 states have (on average 2.9582116378341947) internal successors, (52668), 17804 states have internal predecessors, (52668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17805 states to 17805 states and 52668 transitions. [2021-07-13 19:19:55,729 INFO L78 Accepts]: Start accepts. Automaton has 17805 states and 52668 transitions. Word has length 23 [2021-07-13 19:19:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:55,729 INFO L482 AbstractCegarLoop]: Abstraction has 17805 states and 52668 transitions. [2021-07-13 19:19:55,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:19:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 17805 states and 52668 transitions. [2021-07-13 19:19:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:55,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:55,747 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:55,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-07-13 19:19:55,963 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1475945332, now seen corresponding path program 342 times [2021-07-13 19:19:55,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:55,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854382329] [2021-07-13 19:19:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:56,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854382329] [2021-07-13 19:19:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854382329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801675024] [2021-07-13 19:19:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:19:56,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:19:56,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:56,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801675024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:56,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:56,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:19:56,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628601105] [2021-07-13 19:19:56,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:56,103 INFO L87 Difference]: Start difference. First operand 17805 states and 52668 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) [2021-07-13 19:19:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:56,359 INFO L93 Difference]: Finished difference Result 19831 states and 57467 transitions. [2021-07-13 19:19:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:56,360 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 23 [2021-07-13 19:19:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:56,399 INFO L225 Difference]: With dead ends: 19831 [2021-07-13 19:19:56,400 INFO L226 Difference]: Without dead ends: 19819 [2021-07-13 19:19:56,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:19:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-07-13 19:19:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 17849. [2021-07-13 19:19:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9575302554908114) internal successors, (52786), 17848 states have internal predecessors, (52786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52786 transitions. [2021-07-13 19:19:56,859 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52786 transitions. Word has length 23 [2021-07-13 19:19:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:56,859 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52786 transitions. [2021-07-13 19:19:56,859 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) [2021-07-13 19:19:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52786 transitions. [2021-07-13 19:19:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:56,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:56,878 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:57,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3055,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:57,093 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1900256568, now seen corresponding path program 343 times [2021-07-13 19:19:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265618806] [2021-07-13 19:19:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:57,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265618806] [2021-07-13 19:19:57,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265618806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013625676] [2021-07-13 19:19:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:19:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:19:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:57,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013625676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:57,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:57,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 19:19:57,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212509353] [2021-07-13 19:19:57,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:57,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:57,233 INFO L87 Difference]: Start difference. First operand 17849 states and 52786 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) [2021-07-13 19:19:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:57,629 INFO L93 Difference]: Finished difference Result 19267 states and 56030 transitions. [2021-07-13 19:19:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:19:57,629 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 23 [2021-07-13 19:19:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:57,667 INFO L225 Difference]: With dead ends: 19267 [2021-07-13 19:19:57,667 INFO L226 Difference]: Without dead ends: 19253 [2021-07-13 19:19:57,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:19:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-07-13 19:19:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 17849. [2021-07-13 19:19:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9572501120573733) internal successors, (52781), 17848 states have internal predecessors, (52781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52781 transitions. [2021-07-13 19:19:58,017 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52781 transitions. Word has length 23 [2021-07-13 19:19:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:58,017 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52781 transitions. [2021-07-13 19:19:58,017 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) [2021-07-13 19:19:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52781 transitions. [2021-07-13 19:19:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:58,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:58,035 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:58,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-07-13 19:19:58,251 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2144238716, now seen corresponding path program 344 times [2021-07-13 19:19:58,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:58,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220208159] [2021-07-13 19:19:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:58,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:58,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220208159] [2021-07-13 19:19:58,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220208159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:58,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695621991] [2021-07-13 19:19:58,451 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 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 [2021-07-13 19:19:58,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:58,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:58,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:58,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695621991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:19:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105533961] [2021-07-13 19:19:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:58,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:58,519 INFO L87 Difference]: Start difference. First operand 17849 states and 52781 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) [2021-07-13 19:19:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:58,675 INFO L93 Difference]: Finished difference Result 18130 states and 53192 transitions. [2021-07-13 19:19:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:19:58,675 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 23 [2021-07-13 19:19:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:58,710 INFO L225 Difference]: With dead ends: 18130 [2021-07-13 19:19:58,710 INFO L226 Difference]: Without dead ends: 18126 [2021-07-13 19:19:58,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-07-13 19:19:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17787. [2021-07-13 19:19:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17787 states, 17786 states have (on average 2.9562015068031036) internal successors, (52579), 17786 states have internal predecessors, (52579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17787 states to 17787 states and 52579 transitions. [2021-07-13 19:19:59,113 INFO L78 Accepts]: Start accepts. Automaton has 17787 states and 52579 transitions. Word has length 23 [2021-07-13 19:19:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:59,113 INFO L482 AbstractCegarLoop]: Abstraction has 17787 states and 52579 transitions. [2021-07-13 19:19:59,113 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) [2021-07-13 19:19:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 17787 states and 52579 transitions. [2021-07-13 19:19:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:19:59,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:59,130 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:59,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:59,345 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:59,345 INFO L82 PathProgramCache]: Analyzing trace with hash 907814562, now seen corresponding path program 345 times [2021-07-13 19:19:59,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:59,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462205898] [2021-07-13 19:19:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:59,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:59,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462205898] [2021-07-13 19:19:59,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462205898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:59,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751889288] [2021-07-13 19:19:59,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:19:59,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:19:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:59,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:19:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:59,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751889288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:59,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:59,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-07-13 19:19:59,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590692449] [2021-07-13 19:19:59,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:59,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:59,490 INFO L87 Difference]: Start difference. First operand 17787 states and 52579 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) [2021-07-13 19:19:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:59,729 INFO L93 Difference]: Finished difference Result 18203 states and 53300 transitions. [2021-07-13 19:19:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:59,730 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 23 [2021-07-13 19:19:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:59,767 INFO L225 Difference]: With dead ends: 18203 [2021-07-13 19:19:59,767 INFO L226 Difference]: Without dead ends: 18188 [2021-07-13 19:19:59,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-07-13 19:20:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17734. [2021-07-13 19:20:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17734 states, 17733 states have (on average 2.9543224496701064) internal successors, (52389), 17733 states have internal predecessors, (52389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 52389 transitions. [2021-07-13 19:20:00,245 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 52389 transitions. Word has length 23 [2021-07-13 19:20:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:00,245 INFO L482 AbstractCegarLoop]: Abstraction has 17734 states and 52389 transitions. [2021-07-13 19:20:00,245 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) [2021-07-13 19:20:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 52389 transitions. [2021-07-13 19:20:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:00,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:00,264 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:00,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:00,480 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:00,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:00,480 INFO L82 PathProgramCache]: Analyzing trace with hash 62843110, now seen corresponding path program 346 times [2021-07-13 19:20:00,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:00,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304412358] [2021-07-13 19:20:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:00,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:00,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304412358] [2021-07-13 19:20:00,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304412358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911912278] [2021-07-13 19:20:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:20:00,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:00,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911912278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:00,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-07-13 19:20:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652867001] [2021-07-13 19:20:00,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:00,632 INFO L87 Difference]: Start difference. First operand 17734 states and 52389 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) [2021-07-13 19:20:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:00,883 INFO L93 Difference]: Finished difference Result 18155 states and 53119 transitions. [2021-07-13 19:20:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:00,883 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 23 [2021-07-13 19:20:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:00,919 INFO L225 Difference]: With dead ends: 18155 [2021-07-13 19:20:00,919 INFO L226 Difference]: Without dead ends: 18143 [2021-07-13 19:20:00,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:20:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-07-13 19:20:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17705. [2021-07-13 19:20:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9526660641662903) internal successors, (52274), 17704 states have internal predecessors, (52274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52274 transitions. [2021-07-13 19:20:01,400 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52274 transitions. Word has length 23 [2021-07-13 19:20:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:01,400 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52274 transitions. [2021-07-13 19:20:01,400 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) [2021-07-13 19:20:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52274 transitions. [2021-07-13 19:20:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:01,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:01,418 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:01,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:01,634 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash -361468126, now seen corresponding path program 347 times [2021-07-13 19:20:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:01,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131377097] [2021-07-13 19:20:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:01,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:01,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131377097] [2021-07-13 19:20:01,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131377097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:01,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904425645] [2021-07-13 19:20:01,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:20:01,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:20:01,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:01,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904425645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:01,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:01,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-07-13 19:20:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750640956] [2021-07-13 19:20:01,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:01,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:01,788 INFO L87 Difference]: Start difference. First operand 17705 states and 52274 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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) [2021-07-13 19:20:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:02,094 INFO L93 Difference]: Finished difference Result 18640 states and 54430 transitions. [2021-07-13 19:20:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:20:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23 [2021-07-13 19:20:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:02,133 INFO L225 Difference]: With dead ends: 18640 [2021-07-13 19:20:02,133 INFO L226 Difference]: Without dead ends: 18626 [2021-07-13 19:20:02,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:20:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2021-07-13 19:20:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 17706. [2021-07-13 19:20:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17706 states, 17705 states have (on average 2.952216887884778) internal successors, (52269), 17705 states have internal predecessors, (52269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 52269 transitions. [2021-07-13 19:20:02,612 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 52269 transitions. Word has length 23 [2021-07-13 19:20:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:02,612 INFO L482 AbstractCegarLoop]: Abstraction has 17706 states and 52269 transitions. [2021-07-13 19:20:02,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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) [2021-07-13 19:20:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 52269 transitions. [2021-07-13 19:20:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:02,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:02,631 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:02,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:02,847 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:02,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1602127322, now seen corresponding path program 348 times [2021-07-13 19:20:02,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:02,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80415079] [2021-07-13 19:20:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:02,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:02,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80415079] [2021-07-13 19:20:02,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80415079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:02,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22085304] [2021-07-13 19:20:02,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:20:02,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:20:02,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22085304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:02,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:02,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:20:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725712813] [2021-07-13 19:20:02,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:02,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:02,964 INFO L87 Difference]: Start difference. First operand 17706 states and 52269 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) [2021-07-13 19:20:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:03,108 INFO L93 Difference]: Finished difference Result 18069 states and 52830 transitions. [2021-07-13 19:20:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:20:03,108 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 23 [2021-07-13 19:20:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:03,145 INFO L225 Difference]: With dead ends: 18069 [2021-07-13 19:20:03,146 INFO L226 Difference]: Without dead ends: 18069 [2021-07-13 19:20:03,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18069 states. [2021-07-13 19:20:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18069 to 17709. [2021-07-13 19:20:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17709 states, 17708 states have (on average 2.9522249830585046) internal successors, (52278), 17708 states have internal predecessors, (52278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 52278 transitions. [2021-07-13 19:20:03,598 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 52278 transitions. Word has length 23 [2021-07-13 19:20:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:03,598 INFO L482 AbstractCegarLoop]: Abstraction has 17709 states and 52278 transitions. [2021-07-13 19:20:03,598 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) [2021-07-13 19:20:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 52278 transitions. [2021-07-13 19:20:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:03,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:03,619 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:03,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-07-13 19:20:03,835 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash 935096200, now seen corresponding path program 349 times [2021-07-13 19:20:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:03,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383154803] [2021-07-13 19:20:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:03,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:03,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383154803] [2021-07-13 19:20:03,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383154803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:03,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224812396] [2021-07-13 19:20:03,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:20:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:03,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224812396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:03,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:03,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-07-13 19:20:03,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093169451] [2021-07-13 19:20:03,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:03,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:03,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:03,992 INFO L87 Difference]: Start difference. First operand 17709 states and 52278 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) [2021-07-13 19:20:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:04,342 INFO L93 Difference]: Finished difference Result 19393 states and 56292 transitions. [2021-07-13 19:20:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:04,343 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 23 [2021-07-13 19:20:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:04,385 INFO L225 Difference]: With dead ends: 19393 [2021-07-13 19:20:04,385 INFO L226 Difference]: Without dead ends: 19379 [2021-07-13 19:20:04,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:20:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19379 states. [2021-07-13 19:20:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19379 to 17740. [2021-07-13 19:20:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17740 states, 17739 states have (on average 2.9508991487682508) internal successors, (52346), 17739 states have internal predecessors, (52346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17740 states to 17740 states and 52346 transitions. [2021-07-13 19:20:04,733 INFO L78 Accepts]: Start accepts. Automaton has 17740 states and 52346 transitions. Word has length 23 [2021-07-13 19:20:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:04,734 INFO L482 AbstractCegarLoop]: Abstraction has 17740 states and 52346 transitions. [2021-07-13 19:20:04,734 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) [2021-07-13 19:20:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17740 states and 52346 transitions. [2021-07-13 19:20:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:04,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:04,753 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:04,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-07-13 19:20:04,969 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash 216475460, now seen corresponding path program 350 times [2021-07-13 19:20:04,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:04,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832277513] [2021-07-13 19:20:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:05,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:05,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832277513] [2021-07-13 19:20:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832277513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:05,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033570346] [2021-07-13 19:20:05,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:05,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:05,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033570346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:05,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:05,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-07-13 19:20:05,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101341725] [2021-07-13 19:20:05,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:05,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:05,244 INFO L87 Difference]: Start difference. First operand 17740 states and 52346 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:05,417 INFO L93 Difference]: Finished difference Result 18165 states and 52994 transitions. [2021-07-13 19:20:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:20:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:05,459 INFO L225 Difference]: With dead ends: 18165 [2021-07-13 19:20:05,459 INFO L226 Difference]: Without dead ends: 18165 [2021-07-13 19:20:05,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18165 states. [2021-07-13 19:20:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18165 to 17749. [2021-07-13 19:20:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9512621140410187) internal successors, (52379), 17748 states have internal predecessors, (52379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52379 transitions. [2021-07-13 19:20:05,993 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52379 transitions. Word has length 23 [2021-07-13 19:20:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:05,993 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52379 transitions. [2021-07-13 19:20:05,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52379 transitions. [2021-07-13 19:20:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:06,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:06,010 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:06,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3063,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:06,226 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:06,227 INFO L82 PathProgramCache]: Analyzing trace with hash -622423838, now seen corresponding path program 351 times [2021-07-13 19:20:06,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:06,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51365425] [2021-07-13 19:20:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:06,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:06,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51365425] [2021-07-13 19:20:06,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51365425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:06,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528854543] [2021-07-13 19:20:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:20:06,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:20:06,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528854543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:06,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:06,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:20:06,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666340757] [2021-07-13 19:20:06,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:06,354 INFO L87 Difference]: Start difference. First operand 17749 states and 52379 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:06,557 INFO L93 Difference]: Finished difference Result 18087 states and 52839 transitions. [2021-07-13 19:20:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:20:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:06,593 INFO L225 Difference]: With dead ends: 18087 [2021-07-13 19:20:06,593 INFO L226 Difference]: Without dead ends: 18085 [2021-07-13 19:20:06,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:20:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18085 states. [2021-07-13 19:20:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18085 to 17749. [2021-07-13 19:20:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9509240477800316) internal successors, (52373), 17748 states have internal predecessors, (52373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52373 transitions. [2021-07-13 19:20:07,038 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52373 transitions. Word has length 23 [2021-07-13 19:20:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:07,038 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52373 transitions. [2021-07-13 19:20:07,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52373 transitions. [2021-07-13 19:20:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:07,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:07,057 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:07,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-07-13 19:20:07,273 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:07,274 INFO L82 PathProgramCache]: Analyzing trace with hash 866981158, now seen corresponding path program 352 times [2021-07-13 19:20:07,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:07,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286781308] [2021-07-13 19:20:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:07,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286781308] [2021-07-13 19:20:07,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286781308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310198153] [2021-07-13 19:20:07,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:20:07,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:07,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:07,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310198153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:07,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:07,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-07-13 19:20:07,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914344810] [2021-07-13 19:20:07,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:20:07,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:20:07,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:07,406 INFO L87 Difference]: Start difference. First operand 17749 states and 52373 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:20:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:07,621 INFO L93 Difference]: Finished difference Result 18093 states and 52841 transitions. [2021-07-13 19:20:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:20:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 23 [2021-07-13 19:20:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:07,660 INFO L225 Difference]: With dead ends: 18093 [2021-07-13 19:20:07,660 INFO L226 Difference]: Without dead ends: 18089 [2021-07-13 19:20:07,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:20:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-07-13 19:20:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 17749. [2021-07-13 19:20:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.94990984899707) internal successors, (52355), 17748 states have internal predecessors, (52355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52355 transitions. [2021-07-13 19:20:08,080 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52355 transitions. Word has length 23 [2021-07-13 19:20:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:08,080 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52355 transitions. [2021-07-13 19:20:08,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:20:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52355 transitions. [2021-07-13 19:20:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:08,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:08,099 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:08,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3065,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:08,316 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:08,316 INFO L82 PathProgramCache]: Analyzing trace with hash -206104222, now seen corresponding path program 353 times [2021-07-13 19:20:08,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:08,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721896083] [2021-07-13 19:20:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:08,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721896083] [2021-07-13 19:20:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721896083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219236052] [2021-07-13 19:20:08,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:08,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:20:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219236052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-07-13 19:20:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153763207] [2021-07-13 19:20:08,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:08,448 INFO L87 Difference]: Start difference. First operand 17749 states and 52355 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:20:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:08,685 INFO L93 Difference]: Finished difference Result 18102 states and 52836 transitions. [2021-07-13 19:20:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:20:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23 [2021-07-13 19:20:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:08,724 INFO L225 Difference]: With dead ends: 18102 [2021-07-13 19:20:08,725 INFO L226 Difference]: Without dead ends: 18096 [2021-07-13 19:20:08,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:20:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-07-13 19:20:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17749. [2021-07-13 19:20:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.948388550822628) internal successors, (52328), 17748 states have internal predecessors, (52328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52328 transitions. [2021-07-13 19:20:09,201 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52328 transitions. Word has length 23 [2021-07-13 19:20:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52328 transitions. [2021-07-13 19:20:09,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:20:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52328 transitions. [2021-07-13 19:20:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:09,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:09,220 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:09,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-07-13 19:20:09,436 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 887987366, now seen corresponding path program 354 times [2021-07-13 19:20:09,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:09,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359983071] [2021-07-13 19:20:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:09,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:09,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359983071] [2021-07-13 19:20:09,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359983071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:09,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169496065] [2021-07-13 19:20:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:20:09,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:20:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:09,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169496065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:09,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:09,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:20:09,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860019237] [2021-07-13 19:20:09,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:09,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:09,591 INFO L87 Difference]: Start difference. First operand 17749 states and 52328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:09,834 INFO L93 Difference]: Finished difference Result 20612 states and 59720 transitions. [2021-07-13 19:20:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:20:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:09,877 INFO L225 Difference]: With dead ends: 20612 [2021-07-13 19:20:09,878 INFO L226 Difference]: Without dead ends: 20604 [2021-07-13 19:20:09,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:20:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-07-13 19:20:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 17773. [2021-07-13 19:20:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17773 states, 17772 states have (on average 2.9481769074949358) internal successors, (52395), 17772 states have internal predecessors, (52395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17773 states to 17773 states and 52395 transitions. [2021-07-13 19:20:10,364 INFO L78 Accepts]: Start accepts. Automaton has 17773 states and 52395 transitions. Word has length 23 [2021-07-13 19:20:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:10,364 INFO L482 AbstractCegarLoop]: Abstraction has 17773 states and 52395 transitions. [2021-07-13 19:20:10,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17773 states and 52395 transitions. [2021-07-13 19:20:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:10,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:10,383 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:10,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-13 19:20:10,599 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 445088226, now seen corresponding path program 355 times [2021-07-13 19:20:10,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:10,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976028411] [2021-07-13 19:20:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:10,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:10,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976028411] [2021-07-13 19:20:10,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976028411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:10,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681686506] [2021-07-13 19:20:10,676 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:10,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681686506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:10,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:10,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:20:10,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208644830] [2021-07-13 19:20:10,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:20:10,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:20:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:10,740 INFO L87 Difference]: Start difference. First operand 17773 states and 52395 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) [2021-07-13 19:20:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:11,104 INFO L93 Difference]: Finished difference Result 20639 states and 59747 transitions. [2021-07-13 19:20:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:11,104 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 23 [2021-07-13 19:20:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:11,148 INFO L225 Difference]: With dead ends: 20639 [2021-07-13 19:20:11,148 INFO L226 Difference]: Without dead ends: 20629 [2021-07-13 19:20:11,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:20:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20629 states. [2021-07-13 19:20:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20629 to 17895. [2021-07-13 19:20:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17895 states, 17894 states have (on average 2.948418464289706) internal successors, (52759), 17894 states have internal predecessors, (52759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17895 states to 17895 states and 52759 transitions. [2021-07-13 19:20:11,505 INFO L78 Accepts]: Start accepts. Automaton has 17895 states and 52759 transitions. Word has length 23 [2021-07-13 19:20:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:11,505 INFO L482 AbstractCegarLoop]: Abstraction has 17895 states and 52759 transitions. [2021-07-13 19:20:11,505 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) [2021-07-13 19:20:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17895 states and 52759 transitions. [2021-07-13 19:20:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:11,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:11,524 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:11,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:11,737 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash -399883226, now seen corresponding path program 356 times [2021-07-13 19:20:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:11,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71338916] [2021-07-13 19:20:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:11,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71338916] [2021-07-13 19:20:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71338916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:11,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68068768] [2021-07-13 19:20:11,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:20:11,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:11,986 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:20:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68068768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:12,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:12,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-07-13 19:20:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456847375] [2021-07-13 19:20:12,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:20:12,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:20:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:12,005 INFO L87 Difference]: Start difference. First operand 17895 states and 52759 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) [2021-07-13 19:20:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:12,284 INFO L93 Difference]: Finished difference Result 20525 states and 59344 transitions. [2021-07-13 19:20:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:20:12,285 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 23 [2021-07-13 19:20:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:12,331 INFO L225 Difference]: With dead ends: 20525 [2021-07-13 19:20:12,331 INFO L226 Difference]: Without dead ends: 20513 [2021-07-13 19:20:12,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:20:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20513 states. [2021-07-13 19:20:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20513 to 17903. [2021-07-13 19:20:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 17902 states have (on average 2.948218076192604) internal successors, (52779), 17902 states have internal predecessors, (52779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 52779 transitions. [2021-07-13 19:20:12,885 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 52779 transitions. Word has length 23 [2021-07-13 19:20:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:12,886 INFO L482 AbstractCegarLoop]: Abstraction has 17903 states and 52779 transitions. [2021-07-13 19:20:12,886 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) [2021-07-13 19:20:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 52779 transitions. [2021-07-13 19:20:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:12,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:12,903 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:13,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:13,119 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash -824194462, now seen corresponding path program 357 times [2021-07-13 19:20:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:13,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089505269] [2021-07-13 19:20:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:13,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:13,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089505269] [2021-07-13 19:20:13,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089505269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:13,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996587303] [2021-07-13 19:20:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:20:13,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:20:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:13,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996587303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:13,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:13,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-07-13 19:20:13,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268124834] [2021-07-13 19:20:13,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:13,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:13,295 INFO L87 Difference]: Start difference. First operand 17903 states and 52779 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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) [2021-07-13 19:20:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:13,592 INFO L93 Difference]: Finished difference Result 20558 states and 59379 transitions. [2021-07-13 19:20:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:20:13,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23 [2021-07-13 19:20:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:13,635 INFO L225 Difference]: With dead ends: 20558 [2021-07-13 19:20:13,636 INFO L226 Difference]: Without dead ends: 20544 [2021-07-13 19:20:13,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:20:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20544 states. [2021-07-13 19:20:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20544 to 17922. [2021-07-13 19:20:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17922 states, 17921 states have (on average 2.9477707717203283) internal successors, (52827), 17921 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17922 states to 17922 states and 52827 transitions. [2021-07-13 19:20:14,103 INFO L78 Accepts]: Start accepts. Automaton has 17922 states and 52827 transitions. Word has length 23 [2021-07-13 19:20:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:14,103 INFO L482 AbstractCegarLoop]: Abstraction has 17922 states and 52827 transitions. [2021-07-13 19:20:14,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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) [2021-07-13 19:20:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17922 states and 52827 transitions. [2021-07-13 19:20:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:14,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:14,122 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:14,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3070 [2021-07-13 19:20:14,338 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1092940890, now seen corresponding path program 358 times [2021-07-13 19:20:14,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:14,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26271852] [2021-07-13 19:20:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:14,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26271852] [2021-07-13 19:20:14,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26271852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463722683] [2021-07-13 19:20:14,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:20:14,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:14,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:14,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:14,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463722683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:14,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:14,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-07-13 19:20:14,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757889242] [2021-07-13 19:20:14,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:14,495 INFO L87 Difference]: Start difference. First operand 17922 states and 52827 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) [2021-07-13 19:20:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:14,876 INFO L93 Difference]: Finished difference Result 19475 states and 56422 transitions. [2021-07-13 19:20:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:20:14,876 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 23 [2021-07-13 19:20:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:14,917 INFO L225 Difference]: With dead ends: 19475 [2021-07-13 19:20:14,917 INFO L226 Difference]: Without dead ends: 19459 [2021-07-13 19:20:14,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:20:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-07-13 19:20:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 17924. [2021-07-13 19:20:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.9474418345143114) internal successors, (52827), 17923 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52827 transitions. [2021-07-13 19:20:15,402 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52827 transitions. Word has length 23 [2021-07-13 19:20:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:15,402 INFO L482 AbstractCegarLoop]: Abstraction has 17924 states and 52827 transitions. [2021-07-13 19:20:15,402 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) [2021-07-13 19:20:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52827 transitions. [2021-07-13 19:20:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:15,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:15,423 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:15,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:15,637 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash -416621138, now seen corresponding path program 359 times [2021-07-13 19:20:15,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:15,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135579956] [2021-07-13 19:20:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:15,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:15,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135579956] [2021-07-13 19:20:15,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135579956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17168074] [2021-07-13 19:20:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:20:15,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:20:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:15,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17168074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:15,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:15,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-07-13 19:20:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142748833] [2021-07-13 19:20:15,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:15,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:15,830 INFO L87 Difference]: Start difference. First operand 17924 states and 52827 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:16,186 INFO L93 Difference]: Finished difference Result 18184 states and 53240 transitions. [2021-07-13 19:20:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:16,223 INFO L225 Difference]: With dead ends: 18184 [2021-07-13 19:20:16,223 INFO L226 Difference]: Without dead ends: 18178 [2021-07-13 19:20:16,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:20:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-07-13 19:20:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17931. [2021-07-13 19:20:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.946793084216397) internal successors, (52836), 17930 states have internal predecessors, (52836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52836 transitions. [2021-07-13 19:20:16,553 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52836 transitions. Word has length 23 [2021-07-13 19:20:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:16,553 INFO L482 AbstractCegarLoop]: Abstraction has 17931 states and 52836 transitions. [2021-07-13 19:20:16,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52836 transitions. [2021-07-13 19:20:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:16,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:16,573 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:16,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-07-13 19:20:16,789 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2006669488, now seen corresponding path program 360 times [2021-07-13 19:20:16,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:16,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795205177] [2021-07-13 19:20:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:16,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:16,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795205177] [2021-07-13 19:20:16,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795205177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:16,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136469934] [2021-07-13 19:20:16,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:20:16,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:20:16,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136469934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:16,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:16,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 19:20:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779861871] [2021-07-13 19:20:16,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:16,964 INFO L87 Difference]: Start difference. First operand 17931 states and 52836 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) [2021-07-13 19:20:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:17,320 INFO L93 Difference]: Finished difference Result 18330 states and 53673 transitions. [2021-07-13 19:20:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:17,320 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 23 [2021-07-13 19:20:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:17,360 INFO L225 Difference]: With dead ends: 18330 [2021-07-13 19:20:17,360 INFO L226 Difference]: Without dead ends: 18316 [2021-07-13 19:20:17,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:20:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18316 states. [2021-07-13 19:20:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18316 to 17927. [2021-07-13 19:20:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.9460560080330245) internal successors, (52811), 17926 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52811 transitions. [2021-07-13 19:20:17,717 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52811 transitions. Word has length 23 [2021-07-13 19:20:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:17,717 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52811 transitions. [2021-07-13 19:20:17,717 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) [2021-07-13 19:20:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52811 transitions. [2021-07-13 19:20:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:17,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:17,737 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:17,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3073,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:17,954 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2053778322, now seen corresponding path program 361 times [2021-07-13 19:20:17,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:17,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328210019] [2021-07-13 19:20:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:18,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:18,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328210019] [2021-07-13 19:20:18,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328210019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:18,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223536925] [2021-07-13 19:20:18,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:20:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:18,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223536925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:18,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:18,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-07-13 19:20:18,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801667864] [2021-07-13 19:20:18,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:20:18,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:18,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:20:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:18,101 INFO L87 Difference]: Start difference. First operand 17927 states and 52811 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:18,429 INFO L93 Difference]: Finished difference Result 18362 states and 53572 transitions. [2021-07-13 19:20:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:20:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:18,469 INFO L225 Difference]: With dead ends: 18362 [2021-07-13 19:20:18,469 INFO L226 Difference]: Without dead ends: 18354 [2021-07-13 19:20:18,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:20:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-07-13 19:20:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17927. [2021-07-13 19:20:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.944828740377106) internal successors, (52789), 17926 states have internal predecessors, (52789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52789 transitions. [2021-07-13 19:20:18,818 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52789 transitions. Word has length 23 [2021-07-13 19:20:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:18,818 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52789 transitions. [2021-07-13 19:20:18,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52789 transitions. [2021-07-13 19:20:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:18,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:18,838 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:19,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3074 [2021-07-13 19:20:19,055 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289834, now seen corresponding path program 362 times [2021-07-13 19:20:19,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:19,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274296948] [2021-07-13 19:20:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:19,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:19,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274296948] [2021-07-13 19:20:19,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274296948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:19,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977593881] [2021-07-13 19:20:19,132 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 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 [2021-07-13 19:20:19,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:19,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:19,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:19,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977593881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:19,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:19,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-07-13 19:20:19,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988829256] [2021-07-13 19:20:19,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:19,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:19,207 INFO L87 Difference]: Start difference. First operand 17927 states and 52789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:19,455 INFO L93 Difference]: Finished difference Result 18388 states and 53587 transitions. [2021-07-13 19:20:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:19,494 INFO L225 Difference]: With dead ends: 18388 [2021-07-13 19:20:19,495 INFO L226 Difference]: Without dead ends: 18378 [2021-07-13 19:20:19,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:20:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2021-07-13 19:20:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 17952. [2021-07-13 19:20:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9439585538410116) internal successors, (52847), 17951 states have internal predecessors, (52847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52847 transitions. [2021-07-13 19:20:19,945 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52847 transitions. Word has length 23 [2021-07-13 19:20:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:19,945 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52847 transitions. [2021-07-13 19:20:19,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52847 transitions. [2021-07-13 19:20:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:19,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:19,964 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:20,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-07-13 19:20:20,168 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 953318382, now seen corresponding path program 363 times [2021-07-13 19:20:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:20,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171761606] [2021-07-13 19:20:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:20,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171761606] [2021-07-13 19:20:20,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171761606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385859439] [2021-07-13 19:20:20,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:20:20,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:20:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:20,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:20,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385859439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:20,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:20,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 19:20:20,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028229253] [2021-07-13 19:20:20,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:20,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:20,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:20,323 INFO L87 Difference]: Start difference. First operand 17952 states and 52847 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) [2021-07-13 19:20:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:20,605 INFO L93 Difference]: Finished difference Result 20163 states and 58154 transitions. [2021-07-13 19:20:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:20:20,605 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 23 [2021-07-13 19:20:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:20,648 INFO L225 Difference]: With dead ends: 20163 [2021-07-13 19:20:20,648 INFO L226 Difference]: Without dead ends: 20151 [2021-07-13 19:20:20,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:20:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-07-13 19:20:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 17952. [2021-07-13 19:20:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9437914322321874) internal successors, (52844), 17951 states have internal predecessors, (52844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52844 transitions. [2021-07-13 19:20:21,050 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52844 transitions. Word has length 23 [2021-07-13 19:20:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:21,050 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52844 transitions. [2021-07-13 19:20:21,050 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) [2021-07-13 19:20:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52844 transitions. [2021-07-13 19:20:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:21,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:21,068 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:21,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-07-13 19:20:21,284 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash 529007146, now seen corresponding path program 364 times [2021-07-13 19:20:21,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:21,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62386013] [2021-07-13 19:20:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:21,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:21,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62386013] [2021-07-13 19:20:21,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62386013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:21,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964474268] [2021-07-13 19:20:21,369 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 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 [2021-07-13 19:20:21,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:21,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:21,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964474268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:21,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:21,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-07-13 19:20:21,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774399995] [2021-07-13 19:20:21,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:21,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:21,438 INFO L87 Difference]: Start difference. First operand 17952 states and 52844 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:21,749 INFO L93 Difference]: Finished difference Result 20184 states and 58174 transitions. [2021-07-13 19:20:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:20:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:21,787 INFO L225 Difference]: With dead ends: 20184 [2021-07-13 19:20:21,787 INFO L226 Difference]: Without dead ends: 20170 [2021-07-13 19:20:21,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:20:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-07-13 19:20:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 17968. [2021-07-13 19:20:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9436745143874883) internal successors, (52889), 17967 states have internal predecessors, (52889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52889 transitions. [2021-07-13 19:20:22,186 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52889 transitions. Word has length 23 [2021-07-13 19:20:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:22,186 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52889 transitions. [2021-07-13 19:20:22,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52889 transitions. [2021-07-13 19:20:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:22,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:22,206 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:22,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-07-13 19:20:22,423 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:22,423 INFO L82 PathProgramCache]: Analyzing trace with hash 260260718, now seen corresponding path program 365 times [2021-07-13 19:20:22,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:22,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231625083] [2021-07-13 19:20:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:22,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231625083] [2021-07-13 19:20:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231625083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522841519] [2021-07-13 19:20:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:20:22,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:20:22,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:22,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:22,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522841519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:22,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:22,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 19:20:22,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366509069] [2021-07-13 19:20:22,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:22,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:22,593 INFO L87 Difference]: Start difference. First operand 17968 states and 52889 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) [2021-07-13 19:20:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:22,963 INFO L93 Difference]: Finished difference Result 19526 states and 56440 transitions. [2021-07-13 19:20:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:20:22,964 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 23 [2021-07-13 19:20:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:23,005 INFO L225 Difference]: With dead ends: 19526 [2021-07-13 19:20:23,006 INFO L226 Difference]: Without dead ends: 19510 [2021-07-13 19:20:23,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:20:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2021-07-13 19:20:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 17968. [2021-07-13 19:20:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9435631991985307) internal successors, (52887), 17967 states have internal predecessors, (52887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52887 transitions. [2021-07-13 19:20:23,357 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52887 transitions. Word has length 23 [2021-07-13 19:20:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:23,358 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52887 transitions. [2021-07-13 19:20:23,358 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) [2021-07-13 19:20:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52887 transitions. [2021-07-13 19:20:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:23,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:23,376 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:23,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-07-13 19:20:23,592 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:23,592 INFO L82 PathProgramCache]: Analyzing trace with hash -333235662, now seen corresponding path program 366 times [2021-07-13 19:20:23,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:23,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558837745] [2021-07-13 19:20:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:23,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:23,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558837745] [2021-07-13 19:20:23,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558837745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:23,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801650459] [2021-07-13 19:20:23,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:20:23,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:20:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:23,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801650459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:23,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:23,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-07-13 19:20:23,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345402511] [2021-07-13 19:20:23,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:23,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:23,828 INFO L87 Difference]: Start difference. First operand 17968 states and 52887 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) [2021-07-13 19:20:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:24,011 INFO L93 Difference]: Finished difference Result 18372 states and 53657 transitions. [2021-07-13 19:20:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:24,012 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 23 [2021-07-13 19:20:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:24,046 INFO L225 Difference]: With dead ends: 18372 [2021-07-13 19:20:24,046 INFO L226 Difference]: Without dead ends: 18368 [2021-07-13 19:20:24,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:20:24,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18368 states. [2021-07-13 19:20:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18368 to 18048. [2021-07-13 19:20:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9450878262315068) internal successors, (53150), 18047 states have internal predecessors, (53150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53150 transitions. [2021-07-13 19:20:24,371 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53150 transitions. Word has length 23 [2021-07-13 19:20:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:24,371 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53150 transitions. [2021-07-13 19:20:24,371 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) [2021-07-13 19:20:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53150 transitions. [2021-07-13 19:20:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:24,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:24,390 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:24,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:24,606 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1411119828, now seen corresponding path program 367 times [2021-07-13 19:20:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:24,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039530548] [2021-07-13 19:20:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:24,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:24,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039530548] [2021-07-13 19:20:24,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039530548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:24,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549589724] [2021-07-13 19:20:24,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:20:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:24,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:24,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549589724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:24,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:24,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-07-13 19:20:24,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269835932] [2021-07-13 19:20:24,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:24,764 INFO L87 Difference]: Start difference. First operand 18048 states and 53150 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:24,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:24,992 INFO L93 Difference]: Finished difference Result 19818 states and 57386 transitions. [2021-07-13 19:20:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:25,032 INFO L225 Difference]: With dead ends: 19818 [2021-07-13 19:20:25,032 INFO L226 Difference]: Without dead ends: 19806 [2021-07-13 19:20:25,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:20:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19806 states. [2021-07-13 19:20:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19806 to 18048. [2021-07-13 19:20:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9444228957721506) internal successors, (53138), 18047 states have internal predecessors, (53138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53138 transitions. [2021-07-13 19:20:25,423 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53138 transitions. Word has length 23 [2021-07-13 19:20:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:25,423 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53138 transitions. [2021-07-13 19:20:25,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53138 transitions. [2021-07-13 19:20:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:25,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:25,442 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:25,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:25,658 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:25,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:25,658 INFO L82 PathProgramCache]: Analyzing trace with hash 986808592, now seen corresponding path program 368 times [2021-07-13 19:20:25,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:25,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846516637] [2021-07-13 19:20:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:25,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846516637] [2021-07-13 19:20:25,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846516637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939538594] [2021-07-13 19:20:25,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:25,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:25,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:25,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939538594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:25,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:25,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-07-13 19:20:25,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039834089] [2021-07-13 19:20:25,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:20:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:20:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:25,820 INFO L87 Difference]: Start difference. First operand 18048 states and 53138 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:26,099 INFO L93 Difference]: Finished difference Result 19833 states and 57393 transitions. [2021-07-13 19:20:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:26,139 INFO L225 Difference]: With dead ends: 19833 [2021-07-13 19:20:26,139 INFO L226 Difference]: Without dead ends: 19819 [2021-07-13 19:20:26,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:20:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-07-13 19:20:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 18069. [2021-07-13 19:20:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.9438786805401818) internal successors, (53190), 18068 states have internal predecessors, (53190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53190 transitions. [2021-07-13 19:20:26,506 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53190 transitions. Word has length 23 [2021-07-13 19:20:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:26,506 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53190 transitions. [2021-07-13 19:20:26,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53190 transitions. [2021-07-13 19:20:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:26,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:26,526 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:26,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3081,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:26,738 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 718062164, now seen corresponding path program 369 times [2021-07-13 19:20:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:26,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748705487] [2021-07-13 19:20:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:26,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748705487] [2021-07-13 19:20:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748705487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856536910] [2021-07-13 19:20:26,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:20:26,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:20:26,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:26,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856536910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:26,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:26,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-07-13 19:20:26,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885679281] [2021-07-13 19:20:26,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:20:26,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:26,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:20:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:26,923 INFO L87 Difference]: Start difference. First operand 18069 states and 53190 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:27,264 INFO L93 Difference]: Finished difference Result 19689 states and 56930 transitions. [2021-07-13 19:20:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:20:27,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:27,306 INFO L225 Difference]: With dead ends: 19689 [2021-07-13 19:20:27,307 INFO L226 Difference]: Without dead ends: 19673 [2021-07-13 19:20:27,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:20:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19673 states. [2021-07-13 19:20:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19673 to 18069. [2021-07-13 19:20:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.943767987602391) internal successors, (53188), 18068 states have internal predecessors, (53188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53188 transitions. [2021-07-13 19:20:27,770 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53188 transitions. Word has length 23 [2021-07-13 19:20:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:27,770 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53188 transitions. [2021-07-13 19:20:27,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53188 transitions. [2021-07-13 19:20:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:27,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:27,789 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:28,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-07-13 19:20:28,005 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:28,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1747664174, now seen corresponding path program 370 times [2021-07-13 19:20:28,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:28,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172471011] [2021-07-13 19:20:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:28,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:28,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172471011] [2021-07-13 19:20:28,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172471011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:28,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5929031] [2021-07-13 19:20:28,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:28,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:28,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5929031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:28,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:28,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-07-13 19:20:28,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185645952] [2021-07-13 19:20:28,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:28,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:28,160 INFO L87 Difference]: Start difference. First operand 18069 states and 53188 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:28,335 INFO L93 Difference]: Finished difference Result 18782 states and 54828 transitions. [2021-07-13 19:20:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:28,371 INFO L225 Difference]: With dead ends: 18782 [2021-07-13 19:20:28,372 INFO L226 Difference]: Without dead ends: 18782 [2021-07-13 19:20:28,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-07-13 19:20:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18363. [2021-07-13 19:20:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9503866681189415) internal successors, (54175), 18362 states have internal predecessors, (54175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54175 transitions. [2021-07-13 19:20:28,732 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54175 transitions. Word has length 23 [2021-07-13 19:20:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:28,732 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54175 transitions. [2021-07-13 19:20:28,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54175 transitions. [2021-07-13 19:20:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:28,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:28,753 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:28,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3083,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:28,956 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2038116690, now seen corresponding path program 371 times [2021-07-13 19:20:28,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:28,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742319790] [2021-07-13 19:20:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:29,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:29,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742319790] [2021-07-13 19:20:29,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742319790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:29,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187386190] [2021-07-13 19:20:29,055 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 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 [2021-07-13 19:20:29,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:20:29,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:29,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187386190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:29,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:29,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-07-13 19:20:29,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224460411] [2021-07-13 19:20:29,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:20:29,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:20:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:20:29,146 INFO L87 Difference]: Start difference. First operand 18363 states and 54175 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:29,411 INFO L93 Difference]: Finished difference Result 20117 states and 58445 transitions. [2021-07-13 19:20:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:29,450 INFO L225 Difference]: With dead ends: 20117 [2021-07-13 19:20:29,450 INFO L226 Difference]: Without dead ends: 20101 [2021-07-13 19:20:29,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:20:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-07-13 19:20:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 18363. [2021-07-13 19:20:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9502777475220565) internal successors, (54173), 18362 states have internal predecessors, (54173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54173 transitions. [2021-07-13 19:20:29,777 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54173 transitions. Word has length 23 [2021-07-13 19:20:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:29,777 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54173 transitions. [2021-07-13 19:20:29,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54173 transitions. [2021-07-13 19:20:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:29,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:29,796 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:30,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3084 [2021-07-13 19:20:30,012 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:30,012 INFO L82 PathProgramCache]: Analyzing trace with hash 567863986, now seen corresponding path program 372 times [2021-07-13 19:20:30,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:30,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689487348] [2021-07-13 19:20:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:30,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:30,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689487348] [2021-07-13 19:20:30,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689487348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:30,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734909250] [2021-07-13 19:20:30,097 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 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 [2021-07-13 19:20:30,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:20:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:30,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734909250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:30,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:30,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 17 [2021-07-13 19:20:30,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411507030] [2021-07-13 19:20:30,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:30,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:30,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:30,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:30,170 INFO L87 Difference]: Start difference. First operand 18363 states and 54173 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:30,386 INFO L93 Difference]: Finished difference Result 21290 states and 62446 transitions. [2021-07-13 19:20:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:20:30,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:30,432 INFO L225 Difference]: With dead ends: 21290 [2021-07-13 19:20:30,432 INFO L226 Difference]: Without dead ends: 21290 [2021-07-13 19:20:30,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2021-07-13 19:20:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 20833. [2021-07-13 19:20:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20833 states, 20832 states have (on average 2.9642857142857144) internal successors, (61752), 20832 states have internal predecessors, (61752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 61752 transitions. [2021-07-13 19:20:30,842 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 61752 transitions. Word has length 23 [2021-07-13 19:20:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:30,843 INFO L482 AbstractCegarLoop]: Abstraction has 20833 states and 61752 transitions. [2021-07-13 19:20:30,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 61752 transitions. [2021-07-13 19:20:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:30,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:30,865 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:31,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-07-13 19:20:31,081 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1981648620, now seen corresponding path program 373 times [2021-07-13 19:20:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679044267] [2021-07-13 19:20:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:31,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679044267] [2021-07-13 19:20:31,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679044267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428780552] [2021-07-13 19:20:31,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:31,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428780552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:31,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-07-13 19:20:31,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176655459] [2021-07-13 19:20:31,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:31,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:31,241 INFO L87 Difference]: Start difference. First operand 20833 states and 61752 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:31,392 INFO L93 Difference]: Finished difference Result 21205 states and 62266 transitions. [2021-07-13 19:20:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:20:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:31,437 INFO L225 Difference]: With dead ends: 21205 [2021-07-13 19:20:31,437 INFO L226 Difference]: Without dead ends: 21205 [2021-07-13 19:20:31,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2021-07-13 19:20:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20832. [2021-07-13 19:20:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.964187989054774) internal successors, (61747), 20831 states have internal predecessors, (61747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61747 transitions. [2021-07-13 19:20:31,862 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61747 transitions. Word has length 23 [2021-07-13 19:20:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:31,862 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61747 transitions. [2021-07-13 19:20:31,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61747 transitions. [2021-07-13 19:20:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:31,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:31,884 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:32,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3086,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:32,100 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash -271035312, now seen corresponding path program 374 times [2021-07-13 19:20:32,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:32,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591856843] [2021-07-13 19:20:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:32,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591856843] [2021-07-13 19:20:32,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591856843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:32,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91211705] [2021-07-13 19:20:32,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:20:32,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:32,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91211705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:32,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:32,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-07-13 19:20:32,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417433955] [2021-07-13 19:20:32,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:32,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:32,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:32,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:32,248 INFO L87 Difference]: Start difference. First operand 20832 states and 61747 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:32,462 INFO L93 Difference]: Finished difference Result 21228 states and 62300 transitions. [2021-07-13 19:20:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:32,502 INFO L225 Difference]: With dead ends: 21228 [2021-07-13 19:20:32,502 INFO L226 Difference]: Without dead ends: 21226 [2021-07-13 19:20:32,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:20:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2021-07-13 19:20:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 20832. [2021-07-13 19:20:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.96409197830157) internal successors, (61745), 20831 states have internal predecessors, (61745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61745 transitions. [2021-07-13 19:20:32,879 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61745 transitions. Word has length 23 [2021-07-13 19:20:32,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:32,879 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61745 transitions. [2021-07-13 19:20:32,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61745 transitions. [2021-07-13 19:20:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:32,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:32,899 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:33,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-07-13 19:20:33,115 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:33,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1218369684, now seen corresponding path program 375 times [2021-07-13 19:20:33,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:33,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867105423] [2021-07-13 19:20:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:33,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:33,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867105423] [2021-07-13 19:20:33,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867105423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:33,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239499519] [2021-07-13 19:20:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:20:33,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:20:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239499519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:33,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:33,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-07-13 19:20:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558710931] [2021-07-13 19:20:33,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:33,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:33,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:33,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:33,268 INFO L87 Difference]: Start difference. First operand 20832 states and 61745 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:33,500 INFO L93 Difference]: Finished difference Result 21234 states and 62306 transitions. [2021-07-13 19:20:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:20:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:33,540 INFO L225 Difference]: With dead ends: 21234 [2021-07-13 19:20:33,540 INFO L226 Difference]: Without dead ends: 21230 [2021-07-13 19:20:33,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:20:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21230 states. [2021-07-13 19:20:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21230 to 20841. [2021-07-13 19:20:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964299424184261) internal successors, (61776), 20840 states have internal predecessors, (61776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61776 transitions. [2021-07-13 19:20:33,978 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61776 transitions. Word has length 23 [2021-07-13 19:20:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:33,979 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61776 transitions. [2021-07-13 19:20:33,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61776 transitions. [2021-07-13 19:20:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:33,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:33,999 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:34,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-07-13 19:20:34,216 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 145284304, now seen corresponding path program 376 times [2021-07-13 19:20:34,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:34,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862435284] [2021-07-13 19:20:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:34,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862435284] [2021-07-13 19:20:34,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862435284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:34,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967499764] [2021-07-13 19:20:34,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:20:34,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967499764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:34,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-07-13 19:20:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881238400] [2021-07-13 19:20:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:34,368 INFO L87 Difference]: Start difference. First operand 20841 states and 61776 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:34,613 INFO L93 Difference]: Finished difference Result 25243 states and 73892 transitions. [2021-07-13 19:20:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:34,668 INFO L225 Difference]: With dead ends: 25243 [2021-07-13 19:20:34,668 INFO L226 Difference]: Without dead ends: 25237 [2021-07-13 19:20:34,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:20:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-07-13 19:20:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 20841. [2021-07-13 19:20:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964011516314779) internal successors, (61770), 20840 states have internal predecessors, (61770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61770 transitions. [2021-07-13 19:20:35,096 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61770 transitions. Word has length 23 [2021-07-13 19:20:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:35,096 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61770 transitions. [2021-07-13 19:20:35,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61770 transitions. [2021-07-13 19:20:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:35,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:35,116 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:35,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-07-13 19:20:35,332 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:35,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1239375892, now seen corresponding path program 377 times [2021-07-13 19:20:35,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:35,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642310372] [2021-07-13 19:20:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:35,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:35,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642310372] [2021-07-13 19:20:35,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642310372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:35,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648157684] [2021-07-13 19:20:35,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:20:35,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:20:35,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:35,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:35,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648157684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:35,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:35,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-07-13 19:20:35,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516286384] [2021-07-13 19:20:35,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:20:35,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:35,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:20:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:35,525 INFO L87 Difference]: Start difference. First operand 20841 states and 61770 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:35,815 INFO L93 Difference]: Finished difference Result 25260 states and 73908 transitions. [2021-07-13 19:20:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:20:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:35,882 INFO L225 Difference]: With dead ends: 25260 [2021-07-13 19:20:35,883 INFO L226 Difference]: Without dead ends: 25252 [2021-07-13 19:20:35,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:20:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25252 states. [2021-07-13 19:20:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25252 to 20870. [2021-07-13 19:20:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.9636302649863433) internal successors, (61848), 20869 states have internal predecessors, (61848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61848 transitions. [2021-07-13 19:20:36,363 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61848 transitions. Word has length 23 [2021-07-13 19:20:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:36,363 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61848 transitions. [2021-07-13 19:20:36,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61848 transitions. [2021-07-13 19:20:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:36,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:36,384 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:36,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:36,600 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 796476752, now seen corresponding path program 378 times [2021-07-13 19:20:36,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:36,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859632245] [2021-07-13 19:20:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:36,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:36,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859632245] [2021-07-13 19:20:36,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859632245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:36,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423705746] [2021-07-13 19:20:36,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:36,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:20:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:36,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423705746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:36,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:36,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-07-13 19:20:36,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919834514] [2021-07-13 19:20:36,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:20:36,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:20:36,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:36,775 INFO L87 Difference]: Start difference. First operand 20870 states and 61848 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:37,063 INFO L93 Difference]: Finished difference Result 24954 states and 72952 transitions. [2021-07-13 19:20:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:37,122 INFO L225 Difference]: With dead ends: 24954 [2021-07-13 19:20:37,122 INFO L226 Difference]: Without dead ends: 24944 [2021-07-13 19:20:37,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:20:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24944 states. [2021-07-13 19:20:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 20870. [2021-07-13 19:20:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.963342757199674) internal successors, (61842), 20869 states have internal predecessors, (61842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61842 transitions. [2021-07-13 19:20:37,596 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61842 transitions. Word has length 23 [2021-07-13 19:20:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:37,596 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61842 transitions. [2021-07-13 19:20:37,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61842 transitions. [2021-07-13 19:20:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:37,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:37,619 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:37,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3091,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:37,835 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash -48494700, now seen corresponding path program 379 times [2021-07-13 19:20:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:37,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123737297] [2021-07-13 19:20:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:37,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123737297] [2021-07-13 19:20:37,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123737297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023413649] [2021-07-13 19:20:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:20:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:38,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023413649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:38,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:38,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-07-13 19:20:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870148739] [2021-07-13 19:20:38,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:20:38,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:20:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:20:38,026 INFO L87 Difference]: Start difference. First operand 20870 states and 61842 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:38,328 INFO L93 Difference]: Finished difference Result 24983 states and 72980 transitions. [2021-07-13 19:20:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:20:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:38,383 INFO L225 Difference]: With dead ends: 24983 [2021-07-13 19:20:38,383 INFO L226 Difference]: Without dead ends: 24971 [2021-07-13 19:20:38,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:20:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-07-13 19:20:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 20967. [2021-07-13 19:20:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.963130783172756) internal successors, (62125), 20966 states have internal predecessors, (62125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62125 transitions. [2021-07-13 19:20:38,916 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62125 transitions. Word has length 23 [2021-07-13 19:20:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:38,916 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62125 transitions. [2021-07-13 19:20:38,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62125 transitions. [2021-07-13 19:20:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:38,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:38,941 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:39,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3092 [2021-07-13 19:20:39,157 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:39,157 INFO L82 PathProgramCache]: Analyzing trace with hash -472805936, now seen corresponding path program 380 times [2021-07-13 19:20:39,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:39,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527159102] [2021-07-13 19:20:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:39,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:39,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527159102] [2021-07-13 19:20:39,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527159102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:39,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300029611] [2021-07-13 19:20:39,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:39,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:39,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:39,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:39,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300029611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:39,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:39,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-07-13 19:20:39,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881441537] [2021-07-13 19:20:39,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:20:39,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:39,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:20:39,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:20:39,354 INFO L87 Difference]: Start difference. First operand 20967 states and 62125 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:39,630 INFO L93 Difference]: Finished difference Result 23366 states and 68426 transitions. [2021-07-13 19:20:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:39,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:39,678 INFO L225 Difference]: With dead ends: 23366 [2021-07-13 19:20:39,679 INFO L226 Difference]: Without dead ends: 23352 [2021-07-13 19:20:39,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:20:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-07-13 19:20:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20967. [2021-07-13 19:20:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.9630353906324527) internal successors, (62123), 20966 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62123 transitions. [2021-07-13 19:20:40,113 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62123 transitions. Word has length 23 [2021-07-13 19:20:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:40,114 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62123 transitions. [2021-07-13 19:20:40,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62123 transitions. [2021-07-13 19:20:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:40,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:40,137 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:40,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3093,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:40,353 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash -741552364, now seen corresponding path program 381 times [2021-07-13 19:20:40,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348467772] [2021-07-13 19:20:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:40,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:40,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348467772] [2021-07-13 19:20:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348467772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:40,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840762491] [2021-07-13 19:20:40,478 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 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 [2021-07-13 19:20:40,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:20:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:20:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:40,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840762491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:40,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:40,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-07-13 19:20:40,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921013294] [2021-07-13 19:20:40,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:40,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:40,602 INFO L87 Difference]: Start difference. First operand 20967 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:40,949 INFO L93 Difference]: Finished difference Result 23400 states and 68462 transitions. [2021-07-13 19:20:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:20:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:20:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:41,008 INFO L225 Difference]: With dead ends: 23400 [2021-07-13 19:20:41,008 INFO L226 Difference]: Without dead ends: 23384 [2021-07-13 19:20:41,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:20:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23384 states. [2021-07-13 19:20:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23384 to 20978. [2021-07-13 19:20:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.9629594317585926) internal successors, (62154), 20977 states have internal predecessors, (62154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62154 transitions. [2021-07-13 19:20:41,494 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62154 transitions. Word has length 23 [2021-07-13 19:20:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:41,494 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62154 transitions. [2021-07-13 19:20:41,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62154 transitions. [2021-07-13 19:20:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:20:41,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:41,515 INFO L508 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:41,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3094 [2021-07-13 19:20:41,731 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash -482757040, now seen corresponding path program 382 times [2021-07-13 19:20:41,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:41,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113142362] [2021-07-13 19:20:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:41,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:41,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113142362] [2021-07-13 19:20:41,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113142362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214592378] [2021-07-13 19:20:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:20:41,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:41,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:20:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:41,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214592378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:41,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:41,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-07-13 19:20:41,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754001892] [2021-07-13 19:20:41,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:20:41,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:20:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:20:41,953 INFO L87 Difference]: Start difference. First operand 20978 states and 62154 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) [2021-07-13 19:20:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:42,246 INFO L93 Difference]: Finished difference Result 21340 states and 63016 transitions. [2021-07-13 19:20:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:20:42,247 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 23 [2021-07-13 19:20:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:42,297 INFO L225 Difference]: With dead ends: 21340 [2021-07-13 19:20:42,297 INFO L226 Difference]: Without dead ends: 21331 [2021-07-13 19:20:42,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:20:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21331 states. [2021-07-13 19:20:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21331 to 20978. [2021-07-13 19:20:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.962911760499595) internal successors, (62153), 20977 states have internal predecessors, (62153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62153 transitions. [2021-07-13 19:20:42,780 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62153 transitions. Word has length 23 [2021-07-13 19:20:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:42,780 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62153 transitions. [2021-07-13 19:20:42,780 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) [2021-07-13 19:20:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62153 transitions. [2021-07-13 19:20:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:20:42,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:42,802 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:43,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-07-13 19:20:43,003 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 782455791, now seen corresponding path program 383 times [2021-07-13 19:20:43,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:43,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793276696] [2021-07-13 19:20:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:43,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:43,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793276696] [2021-07-13 19:20:43,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793276696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:43,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705498687] [2021-07-13 19:20:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:20:43,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:20:43,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:43,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:20:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:43,576 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:20:43,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:20:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:20:44,477 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 188 [2021-07-13 19:20:44,991 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 437 [2021-07-13 19:20:45,305 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2021-07-13 19:20:45,774 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 341 [2021-07-13 19:20:46,171 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 677 [2021-07-13 19:20:46,651 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 685 [2021-07-13 19:20:47,851 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 358 [2021-07-13 19:20:48,025 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 361 [2021-07-13 19:20:48,388 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 479 [2021-07-13 19:20:48,755 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 509 [2021-07-13 19:20:49,703 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-07-13 19:20:50,637 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-07-13 19:20:51,691 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1281 DAG size of output: 1053 [2021-07-13 19:20:52,746 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1055 DAG size of output: 1466 [2021-07-13 19:20:52,957 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 1050 DAG size of output: 1118 [2021-07-13 19:20:53,409 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 1045 DAG size of output: 1044 [2021-07-13 19:20:53,673 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 468 [2021-07-13 19:20:53,922 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 434 [2021-07-13 19:20:54,116 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 394 [2021-07-13 19:20:54,953 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 255 [2021-07-13 19:20:55,112 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 270 [2021-07-13 19:20:55,545 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 634 [2021-07-13 19:20:55,851 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 523 [2021-07-13 19:20:56,798 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 269 [2021-07-13 19:20:56,990 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 274 [2021-07-13 19:20:57,348 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 434 [2021-07-13 19:20:57,864 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 521 [2021-07-13 19:20:58,747 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-07-13 19:20:59,631 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-07-13 19:21:00,663 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1386 DAG size of output: 895 [2021-07-13 19:21:01,731 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 897 DAG size of output: 597 [2021-07-13 19:21:01,973 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 443 [2021-07-13 19:21:02,251 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 467 [2021-07-13 19:21:02,595 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 279 [2021-07-13 19:21:03,315 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 386 [2021-07-13 19:21:03,656 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 306 [2021-07-13 19:21:04,351 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 227 [2021-07-13 19:21:04,548 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 292 [2021-07-13 19:21:04,773 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 298 [2021-07-13 19:21:06,119 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 373 [2021-07-13 19:21:06,560 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-07-13 19:21:07,001 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-07-13 19:21:07,596 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 550 [2021-07-13 19:21:08,108 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 630 [2021-07-13 19:21:08,256 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 238 [2021-07-13 19:21:08,903 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 331 [2021-07-13 19:21:09,025 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 222 [2021-07-13 19:21:09,361 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 301 [2021-07-13 19:21:09,509 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-07-13 19:21:09,656 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-07-13 19:21:09,805 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 242 [2021-07-13 19:21:10,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:21:10,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:21:10,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:21:10,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:21:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:10,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705498687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:10,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:10,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:21:10,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420417797] [2021-07-13 19:21:10,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:21:10,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:10,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:21:10,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:10,399 INFO L87 Difference]: Start difference. First operand 20978 states and 62153 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:10,778 INFO L93 Difference]: Finished difference Result 21192 states and 62579 transitions. [2021-07-13 19:21:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:21:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:21:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:10,827 INFO L225 Difference]: With dead ends: 21192 [2021-07-13 19:21:10,827 INFO L226 Difference]: Without dead ends: 21189 [2021-07-13 19:21:10,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2021-07-13 19:21:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21059. [2021-07-13 19:21:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21059 states, 21058 states have (on average 2.9629119574508502) internal successors, (62393), 21058 states have internal predecessors, (62393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 62393 transitions. [2021-07-13 19:21:11,239 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 62393 transitions. Word has length 24 [2021-07-13 19:21:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:11,239 INFO L482 AbstractCegarLoop]: Abstraction has 21059 states and 62393 transitions. [2021-07-13 19:21:11,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 62393 transitions. [2021-07-13 19:21:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:21:11,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:11,262 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:11,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3096,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:11,473 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -840131025, now seen corresponding path program 384 times [2021-07-13 19:21:11,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:11,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342092344] [2021-07-13 19:21:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:11,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:11,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342092344] [2021-07-13 19:21:11,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342092344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:11,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051559819] [2021-07-13 19:21:11,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:21:11,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:21:11,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:21:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:12,003 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:21:12,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:21:12,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:21:13,150 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 380 [2021-07-13 19:21:13,337 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 396 [2021-07-13 19:21:13,568 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 419 [2021-07-13 19:21:13,848 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 428 [2021-07-13 19:21:14,537 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 339 [2021-07-13 19:21:15,238 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 350 [2021-07-13 19:21:15,498 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 589 [2021-07-13 19:21:15,827 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 601 [2021-07-13 19:21:16,349 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 611 [2021-07-13 19:21:16,804 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 624 [2021-07-13 19:21:17,660 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-07-13 19:21:18,522 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-07-13 19:21:19,561 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1128 DAG size of output: 927 [2021-07-13 19:21:20,425 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 788 [2021-07-13 19:21:20,925 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 661 [2021-07-13 19:21:21,441 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 643 [2021-07-13 19:21:21,597 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 486 [2021-07-13 19:21:21,708 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 254 [2021-07-13 19:21:22,217 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 324 [2021-07-13 19:21:22,416 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 382 [2021-07-13 19:21:23,218 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 281 [2021-07-13 19:21:23,604 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 480 [2021-07-13 19:21:24,351 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 252 [2021-07-13 19:21:24,953 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 866 DAG size of output: 528 [2021-07-13 19:21:25,549 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-07-13 19:21:26,146 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-07-13 19:21:26,853 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 1024 DAG size of output: 634 [2021-07-13 19:21:27,696 WARN L205 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 668 [2021-07-13 19:21:28,085 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 512 [2021-07-13 19:21:28,473 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 496 [2021-07-13 19:21:29,206 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 496 [2021-07-13 19:21:29,359 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 364 [2021-07-13 19:21:29,647 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 357 [2021-07-13 19:21:29,988 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 225 [2021-07-13 19:21:30,335 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 303 [2021-07-13 19:21:30,600 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 337 [2021-07-13 19:21:30,783 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 320 [2021-07-13 19:21:31,533 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-07-13 19:21:31,902 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-07-13 19:21:32,495 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 468 [2021-07-13 19:21:32,823 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 400 [2021-07-13 19:21:33,166 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 227 [2021-07-13 19:21:33,717 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 259 [2021-07-13 19:21:34,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:21:34,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:21:34,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:21:34,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:21:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:34,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051559819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:34,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:34,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:21:34,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893636362] [2021-07-13 19:21:34,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:21:34,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:34,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:21:34,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:34,439 INFO L87 Difference]: Start difference. First operand 21059 states and 62393 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:34,800 INFO L93 Difference]: Finished difference Result 21285 states and 62822 transitions. [2021-07-13 19:21:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:21:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:21:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:34,841 INFO L225 Difference]: With dead ends: 21285 [2021-07-13 19:21:34,841 INFO L226 Difference]: Without dead ends: 21282 [2021-07-13 19:21:34,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2021-07-13 19:21:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21109. [2021-07-13 19:21:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21108 states have (on average 2.9639946939548985) internal successors, (62564), 21108 states have internal predecessors, (62564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 62564 transitions. [2021-07-13 19:21:35,240 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 62564 transitions. Word has length 24 [2021-07-13 19:21:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:35,241 INFO L482 AbstractCegarLoop]: Abstraction has 21109 states and 62564 transitions. [2021-07-13 19:21:35,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 62564 transitions. [2021-07-13 19:21:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:21:35,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:35,264 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:35,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4419 [2021-07-13 19:21:35,481 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash 156074215, now seen corresponding path program 385 times [2021-07-13 19:21:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:35,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181982054] [2021-07-13 19:21:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:35,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181982054] [2021-07-13 19:21:35,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181982054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:35,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395710865] [2021-07-13 19:21:35,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:21:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:21:35,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:35,968 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:21:35,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:21:35,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:21:36,731 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 351 [2021-07-13 19:21:36,881 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 358 [2021-07-13 19:21:37,064 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 372 [2021-07-13 19:21:37,286 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 405 [2021-07-13 19:21:37,530 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-07-13 19:21:38,089 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 319 [2021-07-13 19:21:38,226 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 328 [2021-07-13 19:21:38,393 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 342 [2021-07-13 19:21:38,592 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 377 [2021-07-13 19:21:39,061 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-07-13 19:21:39,527 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-07-13 19:21:40,053 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 665 [2021-07-13 19:21:40,763 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 655 [2021-07-13 19:21:40,926 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 536 [2021-07-13 19:21:41,069 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 345 [2021-07-13 19:21:41,215 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 295 [2021-07-13 19:21:41,587 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 272 [2021-07-13 19:21:42,196 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 222 [2021-07-13 19:21:42,535 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 266 [2021-07-13 19:21:42,729 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 269 [2021-07-13 19:21:43,410 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 471 [2021-07-13 19:21:44,132 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 262 [2021-07-13 19:21:44,235 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 265 [2021-07-13 19:21:44,828 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 249 [2021-07-13 19:21:45,047 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 306 [2021-07-13 19:21:45,669 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-07-13 19:21:46,429 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-07-13 19:21:47,097 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 635 [2021-07-13 19:21:48,166 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 637 DAG size of output: 794 [2021-07-13 19:21:49,070 WARN L205 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 681 [2021-07-13 19:21:49,504 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 500 [2021-07-13 19:21:49,647 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 410 [2021-07-13 19:21:49,762 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 249 [2021-07-13 19:21:50,918 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 249 [2021-07-13 19:21:51,106 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 305 [2021-07-13 19:21:51,211 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 229 [2021-07-13 19:21:52,154 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 228 [2021-07-13 19:21:53,004 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 249 [2021-07-13 19:21:53,159 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-07-13 19:21:53,454 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 396 [2021-07-13 19:21:53,987 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 805 DAG size of output: 595 [2021-07-13 19:21:55,076 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-13 19:21:55,320 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 274 [2021-07-13 19:21:57,213 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 1266 DAG size of output: 944 [2021-07-13 19:21:58,615 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1366 DAG size of output: 988 [2021-07-13 19:22:00,152 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1585 DAG size of output: 1151 [2021-07-13 19:22:02,020 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-07-13 19:22:03,859 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-07-13 19:22:05,734 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1862 DAG size of output: 1320 [2021-07-13 19:22:06,463 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 934 DAG size of output: 951 [2021-07-13 19:22:07,145 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 928 [2021-07-13 19:22:07,522 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 534 [2021-07-13 19:22:08,095 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 233 [2021-07-13 19:22:08,319 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 396 [2021-07-13 19:22:08,921 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-07-13 19:22:09,301 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-07-13 19:22:09,601 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 694 DAG size of output: 426 [2021-07-13 19:22:09,858 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 391 [2021-07-13 19:22:10,188 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2021-07-13 19:22:10,583 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 205 [2021-07-13 19:22:11,198 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 271 [2021-07-13 19:22:11,346 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 295 [2021-07-13 19:22:11,532 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-07-13 19:22:11,715 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-07-13 19:22:11,908 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 363 [2021-07-13 19:22:12,177 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 201 [2021-07-13 19:22:12,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:22:12,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:22:12,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:22:12,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:22:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:12,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395710865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:12,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:22:12,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477378801] [2021-07-13 19:22:12,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:22:12,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:22:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:12,328 INFO L87 Difference]: Start difference. First operand 21109 states and 62564 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:12,740 INFO L93 Difference]: Finished difference Result 21361 states and 63065 transitions. [2021-07-13 19:22:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:22:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:22:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:12,782 INFO L225 Difference]: With dead ends: 21361 [2021-07-13 19:22:12,782 INFO L226 Difference]: Without dead ends: 21358 [2021-07-13 19:22:12,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-07-13 19:22:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 21176. [2021-07-13 19:22:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21176 states, 21175 states have (on average 2.965383707201889) internal successors, (62792), 21175 states have internal predecessors, (62792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21176 states to 21176 states and 62792 transitions. [2021-07-13 19:22:13,187 INFO L78 Accepts]: Start accepts. Automaton has 21176 states and 62792 transitions. Word has length 24 [2021-07-13 19:22:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:13,187 INFO L482 AbstractCegarLoop]: Abstraction has 21176 states and 62792 transitions. [2021-07-13 19:22:13,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21176 states and 62792 transitions. [2021-07-13 19:22:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:22:13,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:13,211 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:13,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5277 [2021-07-13 19:22:13,425 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 973665583, now seen corresponding path program 386 times [2021-07-13 19:22:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:13,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55498196] [2021-07-13 19:22:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:13,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55498196] [2021-07-13 19:22:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55498196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333958861] [2021-07-13 19:22:13,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:22:13,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:13,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:13,934 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:22:13,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:22:13,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:22:14,766 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 360 [2021-07-13 19:22:14,940 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 382 [2021-07-13 19:22:15,158 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 404 [2021-07-13 19:22:15,426 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 416 [2021-07-13 19:22:16,567 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 313 [2021-07-13 19:22:16,692 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2021-07-13 19:22:16,848 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 343 [2021-07-13 19:22:17,095 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 465 [2021-07-13 19:22:17,406 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 486 [2021-07-13 19:22:17,783 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 498 [2021-07-13 19:22:18,523 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-07-13 19:22:19,418 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-07-13 19:22:20,229 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 782 [2021-07-13 19:22:21,385 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 784 DAG size of output: 877 [2021-07-13 19:22:21,867 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 712 [2021-07-13 19:22:22,433 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 523 [2021-07-13 19:22:22,550 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-07-13 19:22:23,177 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 386 [2021-07-13 19:22:23,289 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 371 [2021-07-13 19:22:24,038 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 248 [2021-07-13 19:22:24,173 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 257 [2021-07-13 19:22:24,540 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 546 [2021-07-13 19:22:24,989 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 588 [2021-07-13 19:22:25,898 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-07-13 19:22:26,702 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-07-13 19:22:27,554 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 994 DAG size of output: 780 [2021-07-13 19:22:28,415 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 746 [2021-07-13 19:22:28,847 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 554 [2021-07-13 19:22:29,191 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 429 [2021-07-13 19:22:30,400 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 258 [2021-07-13 19:22:30,543 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 434 [2021-07-13 19:22:30,652 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 310 [2021-07-13 19:22:30,961 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2021-07-13 19:22:31,474 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 338 [2021-07-13 19:22:31,577 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 288 [2021-07-13 19:22:32,306 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 242 [2021-07-13 19:22:32,575 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-07-13 19:22:32,845 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-07-13 19:22:33,152 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 392 [2021-07-13 19:22:33,431 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 452 [2021-07-13 19:22:33,970 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 308 [2021-07-13 19:22:34,104 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 264 [2021-07-13 19:22:34,583 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-07-13 19:22:34,687 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-07-13 19:22:34,871 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 299 [2021-07-13 19:22:35,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:22:35,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:22:35,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:22:35,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:22:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:35,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333958861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:35,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:35,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:22:35,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127015379] [2021-07-13 19:22:35,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:22:35,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:22:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:35,837 INFO L87 Difference]: Start difference. First operand 21176 states and 62792 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:36,254 INFO L93 Difference]: Finished difference Result 21460 states and 63374 transitions. [2021-07-13 19:22:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:22:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:22:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:36,297 INFO L225 Difference]: With dead ends: 21460 [2021-07-13 19:22:36,297 INFO L226 Difference]: Without dead ends: 21457 [2021-07-13 19:22:36,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-07-13 19:22:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 21256. [2021-07-13 19:22:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21256 states, 21255 states have (on average 2.967254763585039) internal successors, (63069), 21255 states have internal predecessors, (63069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21256 states to 21256 states and 63069 transitions. [2021-07-13 19:22:36,706 INFO L78 Accepts]: Start accepts. Automaton has 21256 states and 63069 transitions. Word has length 24 [2021-07-13 19:22:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:36,706 INFO L482 AbstractCegarLoop]: Abstraction has 21256 states and 63069 transitions. [2021-07-13 19:22:36,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21256 states and 63069 transitions. [2021-07-13 19:22:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:22:36,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:36,730 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:36,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7738,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:36,942 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash 549194215, now seen corresponding path program 387 times [2021-07-13 19:22:36,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:36,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067548575] [2021-07-13 19:22:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:37,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067548575] [2021-07-13 19:22:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067548575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131504955] [2021-07-13 19:22:37,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:22:37,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:22:37,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:37,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:37,496 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:22:37,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:22:37,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:22:38,430 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-13 19:22:38,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 330 [2021-07-13 19:22:39,033 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 340 [2021-07-13 19:22:39,191 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 346 [2021-07-13 19:22:39,465 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 458 [2021-07-13 19:22:39,810 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-07-13 19:22:40,153 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-07-13 19:22:40,543 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 501 [2021-07-13 19:22:41,058 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 659 [2021-07-13 19:22:41,333 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 552 [2021-07-13 19:22:41,761 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 624 [2021-07-13 19:22:41,947 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 491 [2021-07-13 19:22:42,857 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 370 [2021-07-13 19:22:43,120 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 453 [2021-07-13 19:22:44,095 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 291 [2021-07-13 19:22:44,450 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 294 [2021-07-13 19:22:44,820 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 615 [2021-07-13 19:22:45,313 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 703 [2021-07-13 19:22:45,927 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 1197 DAG size of output: 753 [2021-07-13 19:22:46,716 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-07-13 19:22:47,671 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-07-13 19:22:48,482 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 1418 DAG size of output: 870 [2021-07-13 19:22:49,381 WARN L205 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 872 DAG size of output: 996 [2021-07-13 19:22:49,673 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 236 [2021-07-13 19:22:50,080 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 165 [2021-07-13 19:22:50,283 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 258 [2021-07-13 19:22:51,165 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 794 [2021-07-13 19:22:51,684 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 519 [2021-07-13 19:22:52,164 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 410 [2021-07-13 19:22:52,339 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 220 [2021-07-13 19:22:52,657 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 238 [2021-07-13 19:22:53,097 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 344 [2021-07-13 19:22:53,525 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 266 [2021-07-13 19:22:53,798 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 386 [2021-07-13 19:22:54,230 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-07-13 19:22:54,665 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-07-13 19:22:55,146 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 869 DAG size of output: 469 [2021-07-13 19:22:55,522 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 413 [2021-07-13 19:22:55,978 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 385 [2021-07-13 19:22:56,131 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 256 [2021-07-13 19:22:57,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:22:57,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:22:57,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:22:57,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:22:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:57,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131504955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:57,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:57,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:22:57,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280627383] [2021-07-13 19:22:57,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:22:57,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:22:57,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:57,688 INFO L87 Difference]: Start difference. First operand 21256 states and 63069 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:58,108 INFO L93 Difference]: Finished difference Result 21580 states and 63776 transitions. [2021-07-13 19:22:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:22:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:22:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:58,150 INFO L225 Difference]: With dead ends: 21580 [2021-07-13 19:22:58,151 INFO L226 Difference]: Without dead ends: 21577 [2021-07-13 19:22:58,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-07-13 19:22:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21367. [2021-07-13 19:22:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21367 states, 21366 states have (on average 2.9702798839277356) internal successors, (63463), 21366 states have internal predecessors, (63463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 63463 transitions. [2021-07-13 19:22:58,568 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 63463 transitions. Word has length 24 [2021-07-13 19:22:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:58,568 INFO L482 AbstractCegarLoop]: Abstraction has 21367 states and 63463 transitions. [2021-07-13 19:22:58,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 63463 transitions. [2021-07-13 19:22:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:22:58,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:58,592 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:58,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:58,807 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash 275483695, now seen corresponding path program 388 times [2021-07-13 19:22:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:58,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913283540] [2021-07-13 19:22:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:58,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:58,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913283540] [2021-07-13 19:22:58,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913283540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:58,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11189646] [2021-07-13 19:22:58,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:22:58,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:58,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:59,334 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:22:59,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:22:59,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:23:00,047 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-07-13 19:23:00,433 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 278 [2021-07-13 19:23:00,583 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-07-13 19:23:00,734 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-07-13 19:23:00,914 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 314 [2021-07-13 19:23:01,221 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 354 [2021-07-13 19:23:01,348 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 210 [2021-07-13 19:23:02,566 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 254 [2021-07-13 19:23:02,794 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 347 [2021-07-13 19:23:03,194 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 387 [2021-07-13 19:23:03,338 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 321 [2021-07-13 19:23:03,537 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 246 [2021-07-13 19:23:03,820 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-07-13 19:23:04,603 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 203 [2021-07-13 19:23:04,721 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 206 [2021-07-13 19:23:04,857 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 265 [2021-07-13 19:23:05,027 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 282 [2021-07-13 19:23:05,379 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 263 [2021-07-13 19:23:05,685 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 374 [2021-07-13 19:23:06,280 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-07-13 19:23:07,014 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-07-13 19:23:07,665 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 602 [2021-07-13 19:23:08,416 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 658 [2021-07-13 19:23:08,830 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 529 [2021-07-13 19:23:09,299 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 163 [2021-07-13 19:23:09,458 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 201 [2021-07-13 19:23:09,715 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 326 [2021-07-13 19:23:10,229 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 306 [2021-07-13 19:23:10,752 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 460 [2021-07-13 19:23:10,933 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 280 [2021-07-13 19:23:11,625 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 289 [2021-07-13 19:23:12,058 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 135 [2021-07-13 19:23:12,474 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 313 [2021-07-13 19:23:12,831 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-07-13 19:23:13,190 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-07-13 19:23:13,664 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 830 DAG size of output: 497 [2021-07-13 19:23:14,071 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 540 [2021-07-13 19:23:14,723 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-07-13 19:23:14,988 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-07-13 19:23:15,191 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 324 [2021-07-13 19:23:15,300 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 342 [2021-07-13 19:23:15,485 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 348 [2021-07-13 19:23:16,287 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-07-13 19:23:16,402 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-07-13 19:23:16,654 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 241 [2021-07-13 19:23:16,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:16,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:16,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:16,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:23:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:16,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11189646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:16,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:16,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:23:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690303864] [2021-07-13 19:23:16,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:23:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:23:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:16,770 INFO L87 Difference]: Start difference. First operand 21367 states and 63463 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:17,217 INFO L93 Difference]: Finished difference Result 21704 states and 64205 transitions. [2021-07-13 19:23:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:23:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:23:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:17,265 INFO L225 Difference]: With dead ends: 21704 [2021-07-13 19:23:17,265 INFO L226 Difference]: Without dead ends: 21701 [2021-07-13 19:23:17,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2021-07-13 19:23:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21484. [2021-07-13 19:23:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 2.973746683424103) internal successors, (63885), 21483 states have internal predecessors, (63885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 63885 transitions. [2021-07-13 19:23:17,700 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 63885 transitions. Word has length 24 [2021-07-13 19:23:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:17,700 INFO L482 AbstractCegarLoop]: Abstraction has 21484 states and 63885 transitions. [2021-07-13 19:23:17,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 63885 transitions. [2021-07-13 19:23:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:23:17,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:17,724 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:17,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9870 [2021-07-13 19:23:17,940 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash 380392167, now seen corresponding path program 389 times [2021-07-13 19:23:17,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:17,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822232408] [2021-07-13 19:23:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:18,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822232408] [2021-07-13 19:23:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822232408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435299795] [2021-07-13 19:23:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-07-13 19:23:18,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:23:18,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:18,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:18,506 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:23:18,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:23:19,271 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 315 [2021-07-13 19:23:19,633 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 339 [2021-07-13 19:23:20,220 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 425 [2021-07-13 19:23:20,536 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 445 [2021-07-13 19:23:20,898 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-07-13 19:23:21,397 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-07-13 19:23:21,818 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 481 [2021-07-13 19:23:22,224 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 611 [2021-07-13 19:23:22,827 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 605 [2021-07-13 19:23:23,000 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 330 [2021-07-13 19:23:24,423 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 260 [2021-07-13 19:23:24,563 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 271 [2021-07-13 19:23:24,842 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 386 [2021-07-13 19:23:25,195 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 423 [2021-07-13 19:23:26,363 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 263 [2021-07-13 19:23:26,559 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 286 [2021-07-13 19:23:26,798 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 344 [2021-07-13 19:23:27,112 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 380 [2021-07-13 19:23:27,917 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 662 [2021-07-13 19:23:28,911 WARN L205 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 976 DAG size of output: 744 [2021-07-13 19:23:30,183 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1212 DAG size of output: 935 [2021-07-13 19:23:30,445 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 332 [2021-07-13 19:23:31,669 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 279 [2021-07-13 19:23:32,040 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 319 [2021-07-13 19:23:32,377 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 341 [2021-07-13 19:23:32,741 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 374 [2021-07-13 19:23:33,641 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 112 [2021-07-13 19:23:33,962 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 286 [2021-07-13 19:23:34,178 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2021-07-13 19:23:34,466 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 367 [2021-07-13 19:23:35,265 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 617 [2021-07-13 19:23:36,062 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 620 [2021-07-13 19:23:38,528 WARN L205 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-07-13 19:23:40,919 WARN L205 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-07-13 19:23:43,501 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 1669 DAG size of output: 1302 [2021-07-13 19:23:46,706 WARN L205 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 1304 DAG size of output: 1641 [2021-07-13 19:23:47,506 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 518 [2021-07-13 19:23:47,630 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 358 [2021-07-13 19:23:48,649 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 526 [2021-07-13 19:23:48,870 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 338 [2021-07-13 19:23:49,035 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 248 [2021-07-13 19:23:49,493 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 225 [2021-07-13 19:23:49,684 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-07-13 19:23:49,875 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-07-13 19:23:50,078 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 297 [2021-07-13 19:23:50,845 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 972 DAG size of output: 470 [2021-07-13 19:23:51,287 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 293 [2021-07-13 19:23:51,834 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-07-13 19:23:51,948 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-07-13 19:23:52,078 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 295 [2021-07-13 19:23:52,225 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 249 [2021-07-13 19:23:52,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:23:52,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:52,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:23:52,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:23:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:52,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435299795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:52,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:52,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:23:52,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873219137] [2021-07-13 19:23:52,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:23:52,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:23:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:52,757 INFO L87 Difference]: Start difference. First operand 21484 states and 63885 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:53,155 INFO L93 Difference]: Finished difference Result 21935 states and 64985 transitions. [2021-07-13 19:23:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:23:53,155 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:23:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:53,207 INFO L225 Difference]: With dead ends: 21935 [2021-07-13 19:23:53,207 INFO L226 Difference]: Without dead ends: 21932 [2021-07-13 19:23:53,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2021-07-13 19:23:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 21709. [2021-07-13 19:23:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21709 states, 21708 states have (on average 2.9790399852588907) internal successors, (64669), 21708 states have internal predecessors, (64669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 64669 transitions. [2021-07-13 19:23:53,700 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 64669 transitions. Word has length 24 [2021-07-13 19:23:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:53,700 INFO L482 AbstractCegarLoop]: Abstraction has 21709 states and 64669 transitions. [2021-07-13 19:23:53,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 64669 transitions. [2021-07-13 19:23:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:23:53,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:53,723 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:53,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11112 [2021-07-13 19:23:53,938 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:53,942 INFO L82 PathProgramCache]: Analyzing trace with hash -662412497, now seen corresponding path program 390 times [2021-07-13 19:23:53,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:53,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639612692] [2021-07-13 19:23:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:54,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639612692] [2021-07-13 19:23:54,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639612692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614645875] [2021-07-13 19:23:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:23:54,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:23:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:54,494 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:23:54,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:23:54,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:23:55,662 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 350 [2021-07-13 19:23:55,862 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 370 [2021-07-13 19:23:56,096 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-07-13 19:23:56,467 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-07-13 19:23:56,727 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 396 [2021-07-13 19:23:56,972 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 404 [2021-07-13 19:23:58,554 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 336 [2021-07-13 19:23:58,824 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 522 [2021-07-13 19:23:59,230 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 706 [2021-07-13 19:23:59,390 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 398 [2021-07-13 19:23:59,541 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 429 [2021-07-13 19:23:59,713 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 355 [2021-07-13 19:24:00,657 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 277 [2021-07-13 19:24:00,798 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 289 [2021-07-13 19:24:00,995 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 342 [2021-07-13 19:24:01,871 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 532 [2021-07-13 19:24:02,432 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 560 [2021-07-13 19:24:03,403 WARN L205 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 1676 DAG size of output: 1187 [2021-07-13 19:24:04,648 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-07-13 19:24:05,800 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-07-13 19:24:07,199 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1220 [2021-07-13 19:24:09,085 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 1222 DAG size of output: 1489 [2021-07-13 19:24:11,337 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 1124 DAG size of output: 1154 [2021-07-13 19:24:12,131 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 817 [2021-07-13 19:24:12,941 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 534 [2021-07-13 19:24:13,469 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 495 [2021-07-13 19:24:13,814 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 423 [2021-07-13 19:24:14,047 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 325 [2021-07-13 19:24:14,370 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 325 [2021-07-13 19:24:14,497 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 225 [2021-07-13 19:24:15,116 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 226 [2021-07-13 19:24:15,923 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 323 [2021-07-13 19:24:16,603 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-07-13 19:24:17,207 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 291 [2021-07-13 19:24:17,669 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 519 [2021-07-13 19:24:17,864 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 336 [2021-07-13 19:24:19,258 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 227 [2021-07-13 19:24:19,920 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 290 [2021-07-13 19:24:20,344 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 395 [2021-07-13 19:24:20,591 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 302 [2021-07-13 19:24:21,259 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 164 [2021-07-13 19:24:21,615 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 214 [2021-07-13 19:24:21,807 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 262 [2021-07-13 19:24:22,597 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 221 [2021-07-13 19:24:22,923 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 277 [2021-07-13 19:24:23,334 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 443 [2021-07-13 19:24:24,311 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 689 [2021-07-13 19:24:25,931 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1320 DAG size of output: 996 [2021-07-13 19:24:27,518 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1342 DAG size of output: 1007 [2021-07-13 19:24:29,552 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1463 DAG size of output: 1096 [2021-07-13 19:24:31,645 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 1605 DAG size of output: 1168 [2021-07-13 19:24:34,448 WARN L205 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 1995 DAG size of output: 1476 [2021-07-13 19:24:37,934 WARN L205 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 2414 DAG size of output: 1726 [2021-07-13 19:24:42,329 WARN L205 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-07-13 19:24:46,726 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-07-13 19:24:51,444 WARN L205 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 2852 DAG size of output: 1957 [2021-07-13 19:24:57,661 WARN L205 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 1959 DAG size of output: 2569 [2021-07-13 19:24:58,520 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 1698 DAG size of output: 808 [2021-07-13 19:24:58,949 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 452 [2021-07-13 19:24:59,524 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 232 [2021-07-13 19:24:59,786 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 377 [2021-07-13 19:25:01,073 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-07-13 19:25:02,254 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-07-13 19:25:03,545 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 1790 DAG size of output: 952 [2021-07-13 19:25:04,030 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 433 [2021-07-13 19:25:05,159 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 378 [2021-07-13 19:25:05,879 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-07-13 19:25:06,006 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-07-13 19:25:06,145 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 259 [2021-07-13 19:25:06,262 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 257 [2021-07-13 19:25:06,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:06,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:06,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:06,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:25:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614645875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:06,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:06,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:25:06,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285744518] [2021-07-13 19:25:06,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:25:06,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:25:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:06,550 INFO L87 Difference]: Start difference. First operand 21709 states and 64669 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:06,949 INFO L93 Difference]: Finished difference Result 22176 states and 65792 transitions. [2021-07-13 19:25:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:25:06,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:25:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:06,989 INFO L225 Difference]: With dead ends: 22176 [2021-07-13 19:25:06,990 INFO L226 Difference]: Without dead ends: 22173 [2021-07-13 19:25:06,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2021-07-13 19:25:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 21946. [2021-07-13 19:25:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21946 states, 21945 states have (on average 2.983732057416268) internal successors, (65478), 21945 states have internal predecessors, (65478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21946 states to 21946 states and 65478 transitions. [2021-07-13 19:25:07,418 INFO L78 Accepts]: Start accepts. Automaton has 21946 states and 65478 transitions. Word has length 24 [2021-07-13 19:25:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:07,418 INFO L482 AbstractCegarLoop]: Abstraction has 21946 states and 65478 transitions. [2021-07-13 19:25:07,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:07,418 INFO L276 IsEmpty]: Start isEmpty. Operand 21946 states and 65478 transitions. [2021-07-13 19:25:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:25:07,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:07,445 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:07,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12515 [2021-07-13 19:25:07,662 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:07,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1370381287, now seen corresponding path program 391 times [2021-07-13 19:25:07,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:07,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217963935] [2021-07-13 19:25:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:07,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:07,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217963935] [2021-07-13 19:25:07,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217963935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:07,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579925601] [2021-07-13 19:25:07,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:25:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:07,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:08,199 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:25:08,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:08,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:25:09,381 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 254 [2021-07-13 19:25:09,645 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 274 [2021-07-13 19:25:09,899 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-07-13 19:25:10,150 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-07-13 19:25:10,451 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 351 [2021-07-13 19:25:10,994 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 422 [2021-07-13 19:25:11,848 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 197 [2021-07-13 19:25:11,975 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 200 [2021-07-13 19:25:12,129 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 213 [2021-07-13 19:25:12,418 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-07-13 19:25:13,071 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 242 [2021-07-13 19:25:13,378 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 330 [2021-07-13 19:25:13,600 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 370 [2021-07-13 19:25:14,006 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 369 [2021-07-13 19:25:14,635 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 241 [2021-07-13 19:25:14,807 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 246 [2021-07-13 19:25:15,215 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 125 [2021-07-13 19:25:15,488 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 184 [2021-07-13 19:25:15,724 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 234 [2021-07-13 19:25:16,269 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 240 [2021-07-13 19:25:16,528 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 332 [2021-07-13 19:25:16,894 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 401 [2021-07-13 19:25:17,310 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 461 [2021-07-13 19:25:17,805 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 515 [2021-07-13 19:25:18,835 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 847 DAG size of output: 607 [2021-07-13 19:25:19,911 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 901 DAG size of output: 655 [2021-07-13 19:25:21,500 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-07-13 19:25:22,990 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-07-13 19:25:24,725 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1190 DAG size of output: 806 [2021-07-13 19:25:25,828 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 804 DAG size of output: 823 [2021-07-13 19:25:26,570 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 637 [2021-07-13 19:25:27,304 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 651 [2021-07-13 19:25:27,797 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 488 [2021-07-13 19:25:28,107 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-07-13 19:25:28,314 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 307 [2021-07-13 19:25:28,730 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-07-13 19:25:29,201 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 468 [2021-07-13 19:25:29,654 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 266 [2021-07-13 19:25:29,786 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 220 [2021-07-13 19:25:30,138 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 332 [2021-07-13 19:25:30,554 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 516 [2021-07-13 19:25:31,137 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 935 DAG size of output: 579 [2021-07-13 19:25:31,359 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 246 [2021-07-13 19:25:31,610 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 204 [2021-07-13 19:25:32,470 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2021-07-13 19:25:33,171 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 249 [2021-07-13 19:25:33,364 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 258 [2021-07-13 19:25:34,084 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-07-13 19:25:34,905 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-07-13 19:25:35,937 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1143 DAG size of output: 758 [2021-07-13 19:25:36,384 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 437 [2021-07-13 19:25:36,681 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 377 [2021-07-13 19:25:37,328 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 242 [2021-07-13 19:25:37,678 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-07-13 19:25:38,029 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-07-13 19:25:38,419 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 481 [2021-07-13 19:25:38,828 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 569 [2021-07-13 19:25:39,086 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 394 [2021-07-13 19:25:39,204 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 260 [2021-07-13 19:25:39,502 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 320 [2021-07-13 19:25:40,362 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-07-13 19:25:40,490 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-07-13 19:25:40,633 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 250 [2021-07-13 19:25:40,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:40,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:40,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:40,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:25:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:40,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579925601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:40,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:25:40,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5599123] [2021-07-13 19:25:40,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:25:40,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:25:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:40,832 INFO L87 Difference]: Start difference. First operand 21946 states and 65478 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:41,297 INFO L93 Difference]: Finished difference Result 23670 states and 70444 transitions. [2021-07-13 19:25:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:25:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:25:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:41,343 INFO L225 Difference]: With dead ends: 23670 [2021-07-13 19:25:41,343 INFO L226 Difference]: Without dead ends: 23667 [2021-07-13 19:25:41,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2021-07-13 19:25:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23451. [2021-07-13 19:25:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 2.99181236673774) internal successors, (70158), 23450 states have internal predecessors, (70158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 70158 transitions. [2021-07-13 19:25:41,760 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 70158 transitions. Word has length 24 [2021-07-13 19:25:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:41,760 INFO L482 AbstractCegarLoop]: Abstraction has 23451 states and 70158 transitions. [2021-07-13 19:25:41,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 70158 transitions. [2021-07-13 19:25:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:25:41,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:41,784 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:41,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15472,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:41,999 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -37520849, now seen corresponding path program 392 times [2021-07-13 19:25:41,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:41,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103327625] [2021-07-13 19:25:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:42,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:42,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103327625] [2021-07-13 19:25:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103327625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:42,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791188091] [2021-07-13 19:25:42,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:25:42,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:42,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:42,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:42,533 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:25:42,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:42,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:25:43,227 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-07-13 19:25:43,336 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-07-13 19:25:43,466 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 291 [2021-07-13 19:25:43,686 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 288 [2021-07-13 19:25:43,819 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 282 [2021-07-13 19:25:44,008 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 254 [2021-07-13 19:25:44,649 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 151 [2021-07-13 19:25:45,253 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 198 [2021-07-13 19:25:45,458 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 271 [2021-07-13 19:25:45,873 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 315 [2021-07-13 19:25:46,244 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 341 [2021-07-13 19:25:46,659 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 369 [2021-07-13 19:25:47,146 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 376 [2021-07-13 19:25:47,888 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 399 [2021-07-13 19:25:49,458 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 240 [2021-07-13 19:25:49,693 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 306 [2021-07-13 19:25:50,002 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 356 [2021-07-13 19:25:50,565 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 423 [2021-07-13 19:25:51,028 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 430 [2021-07-13 19:25:51,595 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 466 [2021-07-13 19:25:52,267 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 496 [2021-07-13 19:25:53,735 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1004 DAG size of output: 698 [2021-07-13 19:25:55,213 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-07-13 19:25:56,767 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-07-13 19:25:58,363 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 1059 DAG size of output: 722 [2021-07-13 19:25:59,235 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 433 [2021-07-13 19:25:59,609 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 342 [2021-07-13 19:25:59,816 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 332 [2021-07-13 19:26:00,061 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 238 [2021-07-13 19:26:00,651 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-07-13 19:26:00,772 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-07-13 19:26:00,899 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 231 [2021-07-13 19:26:01,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:01,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:01,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:01,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:26:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791188091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:01,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:26:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008396356] [2021-07-13 19:26:01,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:26:01,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:26:01,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:01,360 INFO L87 Difference]: Start difference. First operand 23451 states and 70158 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,894 INFO L93 Difference]: Finished difference Result 29480 states and 87930 transitions. [2021-07-13 19:26:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:26:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:26:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,954 INFO L225 Difference]: With dead ends: 29480 [2021-07-13 19:26:01,954 INFO L226 Difference]: Without dead ends: 29477 [2021-07-13 19:26:01,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-07-13 19:26:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 29259. [2021-07-13 19:26:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 2.995830200287101) internal successors, (87652), 29258 states have internal predecessors, (87652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 87652 transitions. [2021-07-13 19:26:02,510 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 87652 transitions. Word has length 24 [2021-07-13 19:26:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:02,510 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 87652 transitions. [2021-07-13 19:26:02,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 87652 transitions. [2021-07-13 19:26:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:02,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:02,539 INFO L508 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:02,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16711,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:02,754 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash -732814105, now seen corresponding path program 393 times [2021-07-13 19:26:02,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:02,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986094344] [2021-07-13 19:26:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:02,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986094344] [2021-07-13 19:26:02,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986094344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329769845] [2021-07-13 19:26:02,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:26:02,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:26:02,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:26:02,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:03,284 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-07-13 19:26:03,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:03,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-07-13 19:26:03,869 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 343 [2021-07-13 19:26:04,007 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 351 [2021-07-13 19:26:04,609 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-07-13 19:26:04,918 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 559 [2021-07-13 19:26:05,440 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 309 [2021-07-13 19:26:05,826 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 155 [2021-07-13 19:26:06,164 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-07-13 19:26:06,421 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 525 [2021-07-13 19:26:07,076 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 1056 DAG size of output: 946 [2021-07-13 19:26:07,759 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 370 [2021-07-13 19:26:08,700 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 595 [2021-07-13 19:26:09,413 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 400 [2021-07-13 19:26:09,572 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 414 [2021-07-13 19:26:10,252 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 369 [2021-07-13 19:26:10,599 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 749 DAG size of output: 666 [2021-07-13 19:26:11,323 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 1296 DAG size of output: 1127 [2021-07-13 19:26:13,050 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-07-13 19:26:14,806 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-07-13 19:26:16,756 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1949 [2021-07-13 19:26:16,941 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 1943 [2021-07-13 19:26:17,930 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 1943 DAG size of output: 1870 [2021-07-13 19:26:18,382 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 953 DAG size of output: 1006 [2021-07-13 19:26:19,256 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1093 [2021-07-13 19:26:20,005 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 888 DAG size of output: 792 [2021-07-13 19:26:20,295 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 748 [2021-07-13 19:26:20,578 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 450 [2021-07-13 19:26:20,712 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 329 [2021-07-13 19:26:21,300 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 344 [2021-07-13 19:26:21,407 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 278 [2021-07-13 19:26:22,133 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 317 [2021-07-13 19:26:22,326 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 335 [2021-07-13 19:26:22,698 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-07-13 19:26:23,621 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 267 [2021-07-13 19:26:23,986 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 880 DAG size of output: 518 [2021-07-13 19:26:24,443 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 550 [2021-07-13 19:26:25,124 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 1111 DAG size of output: 698 [2021-07-13 19:26:26,126 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 1185 DAG size of output: 735 [2021-07-13 19:26:26,378 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1023 [2021-07-13 19:26:26,862 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 721 [2021-07-13 19:26:27,069 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 395 [2021-07-13 19:26:27,233 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 361 [2021-07-13 19:26:27,442 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 383 [2021-07-13 19:26:28,121 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 283 [2021-07-13 19:26:28,270 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 290 [2021-07-13 19:26:28,619 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 327 [2021-07-13 19:26:29,441 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 394 [2021-07-13 19:26:29,787 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 523 [2021-07-13 19:26:30,125 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 598 [2021-07-13 19:26:30,386 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 497 [2021-07-13 19:26:30,531 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 310 [2021-07-13 19:26:30,639 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 328 [2021-07-13 19:26:31,604 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 218 [2021-07-13 19:26:31,759 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 342 [2021-07-13 19:26:32,343 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 662 [2021-07-13 19:26:34,071 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-07-13 19:26:35,789 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-07-13 19:26:37,930 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 2280 DAG size of output: 1250 [2021-07-13 19:26:39,060 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1141 DAG size of output: 1073 [2021-07-13 19:26:39,642 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 977 [2021-07-13 19:26:39,823 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 437 [2021-07-13 19:26:40,050 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-07-13 19:26:41,592 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 344 [2021-07-13 19:26:41,854 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 404 [2021-07-13 19:26:42,185 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 425 [2021-07-13 19:26:42,677 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-07-13 19:26:43,296 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-07-13 19:26:43,841 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 547 [2021-07-13 19:26:44,800 WARN L205 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 644 [2021-07-13 19:26:45,586 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 503 [2021-07-13 19:26:46,577 WARN L205 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 558 [2021-07-13 19:26:46,796 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 342 [2021-07-13 19:26:47,043 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 288 [2021-07-13 19:26:48,040 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 322 [2021-07-13 19:26:48,243 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 304 [2021-07-13 19:26:48,400 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 255 [2021-07-13 19:26:48,657 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 19:26:49,237 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 187 [2021-07-13 19:26:49,549 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 420 [2021-07-13 19:26:50,289 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 494 [2021-07-13 19:26:50,775 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-07-13 19:26:51,259 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-07-13 19:26:51,834 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 975 DAG size of output: 581 [2021-07-13 19:26:52,186 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 515 [2021-07-13 19:26:52,465 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 351 [2021-07-13 19:26:53,046 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 228 [2021-07-13 19:26:53,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:53,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:53,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:53,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-07-13 19:26:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:53,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329769845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:53,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-13 19:26:53,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758892790] [2021-07-13 19:26:53,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:26:53,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:53,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:26:53,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:53,252 INFO L87 Difference]: Start difference. First operand 29259 states and 87652 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:53,777 INFO L93 Difference]: Finished difference Result 34712 states and 103669 transitions. [2021-07-13 19:26:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:26:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 19:26:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:53,862 INFO L225 Difference]: With dead ends: 34712 [2021-07-13 19:26:53,862 INFO L226 Difference]: Without dead ends: 34709 [2021-07-13 19:26:53,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34709 states. [2021-07-13 19:26:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34709 to 34499. [2021-07-13 19:26:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34499 states, 34498 states have (on average 2.997362165922662) internal successors, (103403), 34498 states have internal predecessors, (103403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34499 states to 34499 states and 103403 transitions. [2021-07-13 19:26:54,520 INFO L78 Accepts]: Start accepts. Automaton has 34499 states and 103403 transitions. Word has length 24 [2021-07-13 19:26:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:54,520 INFO L482 AbstractCegarLoop]: Abstraction has 34499 states and 103403 transitions. [2021-07-13 19:26:54,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 34499 states and 103403 transitions. [2021-07-13 19:26:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:54,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:54,557 INFO L508 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:54,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17630,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,773 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash -569566705, now seen corresponding path program 394 times [2021-07-13 19:26:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739463347] [2021-07-13 19:26:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:54,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739463347] [2021-07-13 19:26:54,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739463347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868079616] [2021-07-13 19:26:54,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:26:54,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:54,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:54,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868079616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:54,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-07-13 19:26:54,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858820320] [2021-07-13 19:26:54,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:26:54,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:26:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:54,966 INFO L87 Difference]: Start difference. First operand 34499 states and 103403 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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) [2021-07-13 19:26:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,305 INFO L93 Difference]: Finished difference Result 34720 states and 103729 transitions. [2021-07-13 19:26:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:55,306 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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 25 [2021-07-13 19:26:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:55,386 INFO L225 Difference]: With dead ends: 34720 [2021-07-13 19:26:55,387 INFO L226 Difference]: Without dead ends: 34720 [2021-07-13 19:26:55,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:26:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34720 states. [2021-07-13 19:26:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34720 to 34459. [2021-07-13 19:26:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34459 states, 34458 states have (on average 2.9970398746299844) internal successors, (103272), 34458 states have internal predecessors, (103272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34459 states to 34459 states and 103272 transitions. [2021-07-13 19:26:56,046 INFO L78 Accepts]: Start accepts. Automaton has 34459 states and 103272 transitions. Word has length 25 [2021-07-13 19:26:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:56,046 INFO L482 AbstractCegarLoop]: Abstraction has 34459 states and 103272 transitions. [2021-07-13 19:26:56,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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) [2021-07-13 19:26:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34459 states and 103272 transitions. [2021-07-13 19:26:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:56,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:56,084 INFO L508 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:56,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20196,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:56,300 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1490602554, now seen corresponding path program 395 times [2021-07-13 19:26:56,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:56,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050424664] [2021-07-13 19:26:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050424664] [2021-07-13 19:26:56,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050424664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074737524] [2021-07-13 19:26:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:56,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:26:56,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:26:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074737524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-07-13 19:26:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441643356] [2021-07-13 19:26:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:26:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:26:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:56,491 INFO L87 Difference]: Start difference. First operand 34459 states and 103272 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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) [2021-07-13 19:26:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:56,922 INFO L93 Difference]: Finished difference Result 35093 states and 104240 transitions. [2021-07-13 19:26:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:26:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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 25 [2021-07-13 19:26:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:57,298 INFO L225 Difference]: With dead ends: 35093 [2021-07-13 19:26:57,299 INFO L226 Difference]: Without dead ends: 35080 [2021-07-13 19:26:57,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:26:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35080 states. [2021-07-13 19:26:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35080 to 34497. [2021-07-13 19:26:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996173469387755) internal successors, (103356), 34496 states have internal predecessors, (103356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103356 transitions. [2021-07-13 19:26:58,140 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103356 transitions. Word has length 25 [2021-07-13 19:26:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:58,140 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103356 transitions. [2021-07-13 19:26:58,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 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) [2021-07-13 19:26:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103356 transitions. [2021-07-13 19:26:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:58,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:58,179 INFO L508 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:58,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20197 [2021-07-13 19:26:58,396 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash -446698831, now seen corresponding path program 396 times [2021-07-13 19:26:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:58,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905022256] [2021-07-13 19:26:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:58,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905022256] [2021-07-13 19:26:58,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905022256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273211748] [2021-07-13 19:26:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:26:58,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:26:58,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:26:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273211748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:58,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:26:58,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128701785] [2021-07-13 19:26:58,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:26:58,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:58,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:26:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:58,536 INFO L87 Difference]: Start difference. First operand 34497 states and 103356 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:26:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:58,822 INFO L93 Difference]: Finished difference Result 34544 states and 103423 transitions. [2021-07-13 19:26:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:26:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 25 [2021-07-13 19:26:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:58,901 INFO L225 Difference]: With dead ends: 34544 [2021-07-13 19:26:58,901 INFO L226 Difference]: Without dead ends: 34543 [2021-07-13 19:26:58,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34543 states. [2021-07-13 19:26:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34543 to 34497. [2021-07-13 19:26:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996115491651206) internal successors, (103354), 34496 states have internal predecessors, (103354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103354 transitions. [2021-07-13 19:26:59,989 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103354 transitions. Word has length 25 [2021-07-13 19:26:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:59,989 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103354 transitions. [2021-07-13 19:26:59,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:26:59,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103354 transitions. [2021-07-13 19:27:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:27:00,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:00,030 INFO L508 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:00,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20198,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:00,245 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash 470357522, now seen corresponding path program 397 times [2021-07-13 19:27:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:00,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671619356] [2021-07-13 19:27:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:00,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671619356] [2021-07-13 19:27:00,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671619356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919968825] [2021-07-13 19:27:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:27:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:27:00,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919968825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:00,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:27:00,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543929198] [2021-07-13 19:27:00,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:00,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:00,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:00,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:00,389 INFO L87 Difference]: Start difference. First operand 34497 states and 103354 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:00,583 INFO L93 Difference]: Finished difference Result 35864 states and 106497 transitions. [2021-07-13 19:27:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:27:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 25 [2021-07-13 19:27:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:00,656 INFO L225 Difference]: With dead ends: 35864 [2021-07-13 19:27:00,656 INFO L226 Difference]: Without dead ends: 35864 [2021-07-13 19:27:00,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35864 states. [2021-07-13 19:27:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35864 to 34468. [2021-07-13 19:27:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.9955029448457946) internal successors, (103246), 34467 states have internal predecessors, (103246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103246 transitions. [2021-07-13 19:27:01,673 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103246 transitions. Word has length 25 [2021-07-13 19:27:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:01,673 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103246 transitions. [2021-07-13 19:27:01,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103246 transitions. [2021-07-13 19:27:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:27:01,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:01,712 INFO L508 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:01,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20199 [2021-07-13 19:27:01,928 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1195948281, now seen corresponding path program 398 times [2021-07-13 19:27:01,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:01,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391464539] [2021-07-13 19:27:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:01,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391464539] [2021-07-13 19:27:01,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391464539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322394422] [2021-07-13 19:27:01,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-07-13 19:27:02,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:02,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:27:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:02,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322394422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:02,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:27:02,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347433473] [2021-07-13 19:27:02,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:02,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:02,067 INFO L87 Difference]: Start difference. First operand 34468 states and 103246 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:02,330 INFO L93 Difference]: Finished difference Result 34958 states and 104173 transitions. [2021-07-13 19:27:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:02,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 25 [2021-07-13 19:27:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:02,403 INFO L225 Difference]: With dead ends: 34958 [2021-07-13 19:27:02,403 INFO L226 Difference]: Without dead ends: 34958 [2021-07-13 19:27:02,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:27:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2021-07-13 19:27:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 34515. [2021-07-13 19:27:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 2.995624963782813) internal successors, (103391), 34514 states have internal predecessors, (103391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 103391 transitions. [2021-07-13 19:27:03,488 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 103391 transitions. Word has length 25 [2021-07-13 19:27:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:03,488 INFO L482 AbstractCegarLoop]: Abstraction has 34515 states and 103391 transitions. [2021-07-13 19:27:03,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 103391 transitions. [2021-07-13 19:27:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:27:03,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:03,525 INFO L508 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:03,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20200 [2021-07-13 19:27:03,741 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash -251186298, now seen corresponding path program 399 times [2021-07-13 19:27:03,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:03,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81152529] [2021-07-13 19:27:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:03,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:03,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81152529] [2021-07-13 19:27:03,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81152529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:03,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754476934] [2021-07-13 19:27:03,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:27:03,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:27:03,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:27:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754476934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:03,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:03,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:27:03,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306268455] [2021-07-13 19:27:03,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:03,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:03,874 INFO L87 Difference]: Start difference. First operand 34515 states and 103391 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:04,165 INFO L93 Difference]: Finished difference Result 35079 states and 104228 transitions. [2021-07-13 19:27:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:04,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 25 [2021-07-13 19:27:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:04,251 INFO L225 Difference]: With dead ends: 35079 [2021-07-13 19:27:04,251 INFO L226 Difference]: Without dead ends: 35077 [2021-07-13 19:27:04,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35077 states. [2021-07-13 19:27:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35077 to 34527. [2021-07-13 19:27:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34527 states, 34526 states have (on average 2.9958292301453975) internal successors, (103434), 34526 states have internal predecessors, (103434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34527 states to 34527 states and 103434 transitions. [2021-07-13 19:27:05,379 INFO L78 Accepts]: Start accepts. Automaton has 34527 states and 103434 transitions. Word has length 25 [2021-07-13 19:27:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:05,379 INFO L482 AbstractCegarLoop]: Abstraction has 34527 states and 103434 transitions. [2021-07-13 19:27:05,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 34527 states and 103434 transitions. [2021-07-13 19:27:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:27:05,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:05,416 INFO L508 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:05,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20201 [2021-07-13 19:27:05,633 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash 549506409, now seen corresponding path program 400 times [2021-07-13 19:27:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:05,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817765670] [2021-07-13 19:27:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817765670] [2021-07-13 19:27:05,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817765670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814717867] [2021-07-13 19:27:05,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:05,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:27:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814717867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:05,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:27:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584130597] [2021-07-13 19:27:05,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:05,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:05,765 INFO L87 Difference]: Start difference. First operand 34527 states and 103434 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:06,099 INFO L93 Difference]: Finished difference Result 34780 states and 103823 transitions. [2021-07-13 19:27:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 25 [2021-07-13 19:27:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:06,400 INFO L225 Difference]: With dead ends: 34780 [2021-07-13 19:27:06,400 INFO L226 Difference]: Without dead ends: 34778 [2021-07-13 19:27:06,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2021-07-13 19:27:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 34497. [2021-07-13 19:27:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.9955936920222634) internal successors, (103336), 34496 states have internal predecessors, (103336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103336 transitions. [2021-07-13 19:27:07,118 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103336 transitions. Word has length 25 [2021-07-13 19:27:07,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:07,118 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103336 transitions. [2021-07-13 19:27:07,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103336 transitions. [2021-07-13 19:27:07,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:27:07,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:07,161 INFO L508 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:07,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20202 [2021-07-13 19:27:07,377 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1466562762, now seen corresponding path program 401 times [2021-07-13 19:27:07,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:07,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315243950] [2021-07-13 19:27:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:07,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315243950] [2021-07-13 19:27:07,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315243950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990295902] [2021-07-13 19:27:07,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:07,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:27:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:27:07,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:07,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990295902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:07,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:27:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693316877] [2021-07-13 19:27:07,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:27:07,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:27:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:07,515 INFO L87 Difference]: Start difference. First operand 34497 states and 103336 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:07,730 INFO L93 Difference]: Finished difference Result 35545 states and 105444 transitions. [2021-07-13 19:27:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:27:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 25 [2021-07-13 19:27:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:07,805 INFO L225 Difference]: With dead ends: 35545 [2021-07-13 19:27:07,805 INFO L226 Difference]: Without dead ends: 35545 [2021-07-13 19:27:07,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35545 states. [2021-07-13 19:27:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35545 to 34502. [2021-07-13 19:27:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.995536361264891) internal successors, (103349), 34501 states have internal predecessors, (103349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103349 transitions. [2021-07-13 19:27:08,934 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103349 transitions. Word has length 25 [2021-07-13 19:27:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:08,934 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103349 transitions. [2021-07-13 19:27:08,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-07-13 19:27:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103349 transitions. [2021-07-13 19:27:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:27:08,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:08,977 INFO L508 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:09,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20203 [2021-07-13 19:27:09,193 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2034847579, now seen corresponding path program 402 times [2021-07-13 19:27:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:09,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582265074] [2021-07-13 19:27:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:09,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582265074] [2021-07-13 19:27:09,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582265074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014429561] [2021-07-13 19:27:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:27:09,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:27:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:27:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014429561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:09,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 19:27:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107474082] [2021-07-13 19:27:09,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:27:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:27:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:09,344 INFO L87 Difference]: Start difference. First operand 34502 states and 103349 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-13 19:27:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:09,734 INFO L93 Difference]: Finished difference Result 34731 states and 103707 transitions. [2021-07-13 19:27:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:27:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 25 [2021-07-13 19:27:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:09,821 INFO L225 Difference]: With dead ends: 34731 [2021-07-13 19:27:09,821 INFO L226 Difference]: Without dead ends: 34729 [2021-07-13 19:27:09,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:27:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34729 states.