/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/bench/exp2x6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:26:28,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:26:28,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:26:28,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:26:28,330 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 19:26:28,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:26:28,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:26:28,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:26:28,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:26:28,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:26:28,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:26:28,367 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:26:28,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:26:28,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:26:28,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:26:28,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:26:28,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:26:28,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:26:28,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:26:28,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:26:28,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:26:28,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:26:28,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:26:28,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:26:28,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:26:28,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:26:28,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:26:28,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:26:28,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:26:28,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:26:28,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:26:28,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:26:28,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:26:28,699 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:26:28,707 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:26:28,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl [2021-07-13 19:26:28,708 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x6.wvr.bpl' [2021-07-13 19:26:28,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:26:28,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:26:28,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:26:28,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:26:28,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:26:28,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:26:28,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:26:28,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:26:28,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:26:28,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/1) ... [2021-07-13 19:26:28,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:26:28,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:26:28,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:26:28,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:26:28,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (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 19:26:28,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:26:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:26:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:26:28,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:26:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:26:28,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:26:28,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:26:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:26:28,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:26:28,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:26:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:26:28,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:26:28,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:26:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:26:28,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:26:28,886 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 19:26:29,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:26:29,103 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:26:29,104 INFO L202 PluginConnector]: Adding new model exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:26:29 BoogieIcfgContainer [2021-07-13 19:26:29,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:26:29,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:26:29,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:26:29,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:26:29,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:26:28" (1/2) ... [2021-07-13 19:26:29,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368968e3 and model type exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:26:29, skipping insertion in model container [2021-07-13 19:26:29,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:26:29" (2/2) ... [2021-07-13 19:26:29,109 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x6.wvr.bpl [2021-07-13 19:26:29,125 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:26:29,126 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:26:29,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:26:29,127 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:26:29,213 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 19:26:29,229 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 19:26:29,251 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:26:29,251 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:26:29,251 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:26:29,252 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:26:29,252 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:26:29,252 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:26:29,252 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:26:29,252 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:26:29,259 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 45 transitions, 122 flow [2021-07-13 19:26:29,437 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3204 states, 3203 states have (on average 3.9572275991258197) internal successors, (12675), 3203 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 3204 states, 3203 states have (on average 3.9572275991258197) internal successors, (12675), 3203 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:29,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:29,484 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:29,484 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:29,492 INFO L82 PathProgramCache]: Analyzing trace with hash -176416249, now seen corresponding path program 1 times [2021-07-13 19:26:29,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:29,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850308406] [2021-07-13 19:26:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:29,644 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 19:26:29,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:29,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850308406] [2021-07-13 19:26:29,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850308406] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:29,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:29,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:26:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303552742] [2021-07-13 19:26:29,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:26:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:29,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:26:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:26:29,667 INFO L87 Difference]: Start difference. First operand has 3204 states, 3203 states have (on average 3.9572275991258197) internal successors, (12675), 3203 states have internal predecessors, (12675), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 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 19:26:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:29,816 INFO L93 Difference]: Finished difference Result 3629 states and 14324 transitions. [2021-07-13 19:26:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:26:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2021-07-13 19:26:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:29,861 INFO L225 Difference]: With dead ends: 3629 [2021-07-13 19:26:29,862 INFO L226 Difference]: Without dead ends: 3598 [2021-07-13 19:26:29,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:26:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-07-13 19:26:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3333. [2021-07-13 19:26:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 3.952280912364946) internal successors, (13169), 3332 states have internal predecessors, (13169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 13169 transitions. [2021-07-13 19:26:30,113 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 13169 transitions. Word has length 19 [2021-07-13 19:26:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:30,114 INFO L482 AbstractCegarLoop]: Abstraction has 3333 states and 13169 transitions. [2021-07-13 19:26:30,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19:26:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 13169 transitions. [2021-07-13 19:26:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:30,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:30,127 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:30,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:26:30,128 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1596364547, now seen corresponding path program 1 times [2021-07-13 19:26:30,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:30,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050019016] [2021-07-13 19:26:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,178 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 19:26:30,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050019016] [2021-07-13 19:26:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050019016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154242220] [2021-07-13 19:26:30,179 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 19:26:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:26:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:30,414 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 19:26:30,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154242220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:30,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:26:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110048518] [2021-07-13 19:26:30,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:30,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:30,417 INFO L87 Difference]: Start difference. First operand 3333 states and 13169 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:30,547 INFO L93 Difference]: Finished difference Result 6091 states and 23571 transitions. [2021-07-13 19:26:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:30,587 INFO L225 Difference]: With dead ends: 6091 [2021-07-13 19:26:30,587 INFO L226 Difference]: Without dead ends: 6091 [2021-07-13 19:26:30,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-07-13 19:26:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 3780. [2021-07-13 19:26:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3780 states, 3779 states have (on average 3.988885948663668) internal successors, (15074), 3779 states have internal predecessors, (15074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3780 states to 3780 states and 15074 transitions. [2021-07-13 19:26:30,767 INFO L78 Accepts]: Start accepts. Automaton has 3780 states and 15074 transitions. Word has length 24 [2021-07-13 19:26:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:30,767 INFO L482 AbstractCegarLoop]: Abstraction has 3780 states and 15074 transitions. [2021-07-13 19:26:30,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3780 states and 15074 transitions. [2021-07-13 19:26:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:30,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:30,819 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:31,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:26:31,029 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash 787684274, now seen corresponding path program 1 times [2021-07-13 19:26:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:31,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762738838] [2021-07-13 19:26:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:31,063 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 19:26:31,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:31,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762738838] [2021-07-13 19:26:31,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762738838] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:31,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:31,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:31,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233063697] [2021-07-13 19:26:31,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:31,069 INFO L87 Difference]: Start difference. First operand 3780 states and 15074 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:31,161 INFO L93 Difference]: Finished difference Result 4891 states and 19118 transitions. [2021-07-13 19:26:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:31,202 INFO L225 Difference]: With dead ends: 4891 [2021-07-13 19:26:31,202 INFO L226 Difference]: Without dead ends: 4883 [2021-07-13 19:26:31,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:31,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2021-07-13 19:26:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 3892. [2021-07-13 19:26:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3891 states have (on average 3.9671035723464403) internal successors, (15436), 3891 states have internal predecessors, (15436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 15436 transitions. [2021-07-13 19:26:31,345 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 15436 transitions. Word has length 24 [2021-07-13 19:26:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:31,345 INFO L482 AbstractCegarLoop]: Abstraction has 3892 states and 15436 transitions. [2021-07-13 19:26:31,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 15436 transitions. [2021-07-13 19:26:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:31,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:31,356 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:31,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:26:31,356 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1247895235, now seen corresponding path program 1 times [2021-07-13 19:26:31,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:31,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509871809] [2021-07-13 19:26:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:31,390 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 19:26:31,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:31,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509871809] [2021-07-13 19:26:31,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509871809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056985249] [2021-07-13 19:26:31,391 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 19:26:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:26:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:31,465 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 19:26:31,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056985249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:31,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:26:31,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097673730] [2021-07-13 19:26:31,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:31,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:31,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:31,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:31,467 INFO L87 Difference]: Start difference. First operand 3892 states and 15436 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:31,582 INFO L93 Difference]: Finished difference Result 6588 states and 25636 transitions. [2021-07-13 19:26:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:31,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:31,610 INFO L225 Difference]: With dead ends: 6588 [2021-07-13 19:26:31,610 INFO L226 Difference]: Without dead ends: 6588 [2021-07-13 19:26:31,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-07-13 19:26:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 4463. [2021-07-13 19:26:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 4.017480950246526) internal successors, (17926), 4462 states have internal predecessors, (17926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 17926 transitions. [2021-07-13 19:26:31,804 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 17926 transitions. Word has length 24 [2021-07-13 19:26:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:31,804 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 17926 transitions. [2021-07-13 19:26:31,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 17926 transitions. [2021-07-13 19:26:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:31,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:31,823 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:32,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:32,041 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,042 INFO L82 PathProgramCache]: Analyzing trace with hash 4371448, now seen corresponding path program 1 times [2021-07-13 19:26:32,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465578702] [2021-07-13 19:26:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,078 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 19:26:32,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:32,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465578702] [2021-07-13 19:26:32,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465578702] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:32,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:32,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:32,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508968927] [2021-07-13 19:26:32,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:32,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:32,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:32,081 INFO L87 Difference]: Start difference. First operand 4463 states and 17926 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:32,165 INFO L93 Difference]: Finished difference Result 5640 states and 22182 transitions. [2021-07-13 19:26:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:32,188 INFO L225 Difference]: With dead ends: 5640 [2021-07-13 19:26:32,189 INFO L226 Difference]: Without dead ends: 5622 [2021-07-13 19:26:32,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5622 states. [2021-07-13 19:26:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5622 to 4591. [2021-07-13 19:26:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 3.9971677559912853) internal successors, (18347), 4590 states have internal predecessors, (18347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 18347 transitions. [2021-07-13 19:26:32,351 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 18347 transitions. Word has length 24 [2021-07-13 19:26:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:32,351 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 18347 transitions. [2021-07-13 19:26:32,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 18347 transitions. [2021-07-13 19:26:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:32,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:32,363 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:32,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:26:32,363 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 979513020, now seen corresponding path program 2 times [2021-07-13 19:26:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79419173] [2021-07-13 19:26:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,380 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 19:26:32,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79419173] [2021-07-13 19:26:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79419173] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:32,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:32,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:32,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296521196] [2021-07-13 19:26:32,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:32,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:32,381 INFO L87 Difference]: Start difference. First operand 4591 states and 18347 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:32,451 INFO L93 Difference]: Finished difference Result 5958 states and 23476 transitions. [2021-07-13 19:26:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:32,472 INFO L225 Difference]: With dead ends: 5958 [2021-07-13 19:26:32,472 INFO L226 Difference]: Without dead ends: 5958 [2021-07-13 19:26:32,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2021-07-13 19:26:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5142. [2021-07-13 19:26:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.9941645594242363) internal successors, (20534), 5141 states have internal predecessors, (20534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 20534 transitions. [2021-07-13 19:26:32,644 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 20534 transitions. Word has length 24 [2021-07-13 19:26:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:32,645 INFO L482 AbstractCegarLoop]: Abstraction has 5142 states and 20534 transitions. [2021-07-13 19:26:32,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 20534 transitions. [2021-07-13 19:26:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:32,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:32,659 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:32,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:26:32,659 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1301374515, now seen corresponding path program 2 times [2021-07-13 19:26:32,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67167911] [2021-07-13 19:26:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,687 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 19:26:32,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:32,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67167911] [2021-07-13 19:26:32,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67167911] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:32,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:32,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:32,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284238537] [2021-07-13 19:26:32,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:32,688 INFO L87 Difference]: Start difference. First operand 5142 states and 20534 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:32,782 INFO L93 Difference]: Finished difference Result 5957 states and 23318 transitions. [2021-07-13 19:26:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:32,803 INFO L225 Difference]: With dead ends: 5957 [2021-07-13 19:26:32,804 INFO L226 Difference]: Without dead ends: 5926 [2021-07-13 19:26:32,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-07-13 19:26:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5271. [2021-07-13 19:26:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5271 states, 5270 states have (on average 3.97438330170778) internal successors, (20945), 5270 states have internal predecessors, (20945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5271 states to 5271 states and 20945 transitions. [2021-07-13 19:26:32,965 INFO L78 Accepts]: Start accepts. Automaton has 5271 states and 20945 transitions. Word has length 24 [2021-07-13 19:26:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:32,965 INFO L482 AbstractCegarLoop]: Abstraction has 5271 states and 20945 transitions. [2021-07-13 19:26:32,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5271 states and 20945 transitions. [2021-07-13 19:26:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:32,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:32,978 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:32,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:26:32,978 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1091376970, now seen corresponding path program 2 times [2021-07-13 19:26:32,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304276697] [2021-07-13 19:26:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:33,003 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 19:26:33,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:33,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304276697] [2021-07-13 19:26:33,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304276697] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:33,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:33,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:33,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174794434] [2021-07-13 19:26:33,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:33,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:33,004 INFO L87 Difference]: Start difference. First operand 5271 states and 20945 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:33,120 INFO L93 Difference]: Finished difference Result 7039 states and 27626 transitions. [2021-07-13 19:26:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:33,145 INFO L225 Difference]: With dead ends: 7039 [2021-07-13 19:26:33,145 INFO L226 Difference]: Without dead ends: 7039 [2021-07-13 19:26:33,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7039 states. [2021-07-13 19:26:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7039 to 5864. [2021-07-13 19:26:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5864 states, 5863 states have (on average 3.980897151628859) internal successors, (23340), 5863 states have internal predecessors, (23340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 23340 transitions. [2021-07-13 19:26:33,311 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 23340 transitions. Word has length 24 [2021-07-13 19:26:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:33,311 INFO L482 AbstractCegarLoop]: Abstraction has 5864 states and 23340 transitions. [2021-07-13 19:26:33,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 23340 transitions. [2021-07-13 19:26:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:26:33,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:33,326 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:33,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:26:33,326 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash 815941149, now seen corresponding path program 2 times [2021-07-13 19:26:33,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:33,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349306203] [2021-07-13 19:26:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:33,341 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 19:26:33,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:33,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349306203] [2021-07-13 19:26:33,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349306203] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:26:33,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:26:33,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:26:33,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316749374] [2021-07-13 19:26:33,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:26:33,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:26:33,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:26:33,343 INFO L87 Difference]: Start difference. First operand 5864 states and 23340 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:33,424 INFO L93 Difference]: Finished difference Result 6971 states and 27116 transitions. [2021-07-13 19:26:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:26:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 19:26:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:33,447 INFO L225 Difference]: With dead ends: 6971 [2021-07-13 19:26:33,447 INFO L226 Difference]: Without dead ends: 6943 [2021-07-13 19:26:33,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:26:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-07-13 19:26:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 6067. [2021-07-13 19:26:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6067 states, 6066 states have (on average 3.9658753709198815) internal successors, (24057), 6066 states have internal predecessors, (24057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 24057 transitions. [2021-07-13 19:26:33,709 INFO L78 Accepts]: Start accepts. Automaton has 6067 states and 24057 transitions. Word has length 24 [2021-07-13 19:26:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:33,709 INFO L482 AbstractCegarLoop]: Abstraction has 6067 states and 24057 transitions. [2021-07-13 19:26:33,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6067 states and 24057 transitions. [2021-07-13 19:26:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:33,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:33,722 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:33,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:26:33,722 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:33,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash -746670468, now seen corresponding path program 1 times [2021-07-13 19:26:33,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:33,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807994131] [2021-07-13 19:26:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:33,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:33,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807994131] [2021-07-13 19:26:33,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807994131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:33,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657375499] [2021-07-13 19:26:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:26:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:26:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:34,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657375499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:34,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-07-13 19:26:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293314580] [2021-07-13 19:26:34,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:34,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:34,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:34,408 INFO L87 Difference]: Start difference. First operand 6067 states and 24057 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:35,100 INFO L93 Difference]: Finished difference Result 8499 states and 32997 transitions. [2021-07-13 19:26:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:35,126 INFO L225 Difference]: With dead ends: 8499 [2021-07-13 19:26:35,126 INFO L226 Difference]: Without dead ends: 8363 [2021-07-13 19:26:35,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8363 states. [2021-07-13 19:26:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8363 to 6744. [2021-07-13 19:26:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6744 states, 6743 states have (on average 3.9549162094023433) internal successors, (26668), 6743 states have internal predecessors, (26668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6744 states to 6744 states and 26668 transitions. [2021-07-13 19:26:35,342 INFO L78 Accepts]: Start accepts. Automaton has 6744 states and 26668 transitions. Word has length 29 [2021-07-13 19:26:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:35,342 INFO L482 AbstractCegarLoop]: Abstraction has 6744 states and 26668 transitions. [2021-07-13 19:26:35,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 6744 states and 26668 transitions. [2021-07-13 19:26:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:35,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:35,359 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:35,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:26:35,573 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1040906004, now seen corresponding path program 2 times [2021-07-13 19:26:35,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:35,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136955840] [2021-07-13 19:26:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:35,638 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 19:26:35,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:35,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136955840] [2021-07-13 19:26:35,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136955840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:35,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883442338] [2021-07-13 19:26:35,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 19:26:35,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:35,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:26:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883442338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:36,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-07-13 19:26:36,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480841724] [2021-07-13 19:26:36,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:36,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:36,128 INFO L87 Difference]: Start difference. First operand 6744 states and 26668 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:37,011 INFO L93 Difference]: Finished difference Result 10094 states and 39061 transitions. [2021-07-13 19:26:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:26:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:37,044 INFO L225 Difference]: With dead ends: 10094 [2021-07-13 19:26:37,044 INFO L226 Difference]: Without dead ends: 9890 [2021-07-13 19:26:37,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9890 states. [2021-07-13 19:26:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9890 to 7521. [2021-07-13 19:26:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7521 states, 7520 states have (on average 3.9558510638297872) internal successors, (29748), 7520 states have internal predecessors, (29748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7521 states to 7521 states and 29748 transitions. [2021-07-13 19:26:37,258 INFO L78 Accepts]: Start accepts. Automaton has 7521 states and 29748 transitions. Word has length 29 [2021-07-13 19:26:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:37,259 INFO L482 AbstractCegarLoop]: Abstraction has 7521 states and 29748 transitions. [2021-07-13 19:26:37,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7521 states and 29748 transitions. [2021-07-13 19:26:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:26:37,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:37,277 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:37,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:37,493 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash 984395042, now seen corresponding path program 3 times [2021-07-13 19:26:37,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:37,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120824553] [2021-07-13 19:26:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:37,548 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 19:26:37,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:37,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120824553] [2021-07-13 19:26:37,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120824553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120149486] [2021-07-13 19:26:37,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 19:26:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:26:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:26:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:37,875 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-07-13 19:26:38,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 19:26:38,094 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:597) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-07-13 19:26:38,101 INFO L168 Benchmark]: Toolchain (without parser) took 9364.70 ms. Allocated memory was 127.9 MB in the beginning and 1.0 GB in the end (delta: 903.9 MB). Free memory was 107.1 MB in the beginning and 428.7 MB in the end (delta: -321.5 MB). Peak memory consumption was 583.4 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:38,101 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 127.9 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:26:38,101 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.17 ms. Allocated memory is still 127.9 MB. Free memory was 107.0 MB in the beginning and 105.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:38,101 INFO L168 Benchmark]: Boogie Preprocessor took 11.74 ms. Allocated memory is still 127.9 MB. Free memory was 105.6 MB in the beginning and 104.6 MB in the end (delta: 976.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:38,102 INFO L168 Benchmark]: RCFGBuilder took 308.95 ms. Allocated memory is still 127.9 MB. Free memory was 104.5 MB in the beginning and 104.8 MB in the end (delta: -212.4 kB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:38,102 INFO L168 Benchmark]: TraceAbstraction took 8995.07 ms. Allocated memory was 127.9 MB in the beginning and 1.0 GB in the end (delta: 903.9 MB). Free memory was 104.3 MB in the beginning and 428.7 MB in the end (delta: -324.3 MB). Peak memory consumption was 579.4 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:38,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 127.9 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.17 ms. Allocated memory is still 127.9 MB. Free memory was 107.0 MB in the beginning and 105.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.74 ms. Allocated memory is still 127.9 MB. Free memory was 105.6 MB in the beginning and 104.6 MB in the end (delta: 976.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 308.95 ms. Allocated memory is still 127.9 MB. Free memory was 104.5 MB in the beginning and 104.8 MB in the end (delta: -212.4 kB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8995.07 ms. Allocated memory was 127.9 MB in the beginning and 1.0 GB in the end (delta: 903.9 MB). Free memory was 104.3 MB in the beginning and 428.7 MB in the end (delta: -324.3 MB). Peak memory consumption was 579.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...