/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/popl20-more/min-le-max.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:34:23,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:34:23,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:34:23,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:34:23,362 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 [2021-07-09 18:34:23,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:34:23,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:34:23,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:34:23,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:34:23,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:34:23,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:34:23,400 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:34:23,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:34:23,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:34:23,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:34:23,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:34:23,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:34:23,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:34:23,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:34:23,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:34:23,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:34:23,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:34:23,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:34:23,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:34:23,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:34:23,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:34:23,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:34:23,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:34:23,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:34:23,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:34:23,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:34:23,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:34:23,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:34:23,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:34:23,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:34:23,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:34:23,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:34:23,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:34:23,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:34:23,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:34:23,774 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:34:23,775 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:34:23,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-le-max.wvr.bpl [2021-07-09 18:34:23,776 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-le-max.wvr.bpl' [2021-07-09 18:34:23,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:34:23,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:34:23,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:34:23,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:34:23,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:34:23,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:34:23,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:34:23,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:34:23,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:34:23,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/1) ... [2021-07-09 18:34:23,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:34:23,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:34:23,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:34:23,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:34:23,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (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 [2021-07-09 18:34:23,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:34:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:34:23,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:34:23,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:34:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:34:23,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:34:23,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:34:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:34:23,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:34:23,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:34:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:34:23,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:34:23,928 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:34:24,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:34:24,116 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:34:24,117 INFO L202 PluginConnector]: Adding new model min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:34:24 BoogieIcfgContainer [2021-07-09 18:34:24,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:34:24,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:34:24,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:34:24,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:34:24,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:34:23" (1/2) ... [2021-07-09 18:34:24,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13586195 and model type min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:34:24, skipping insertion in model container [2021-07-09 18:34:24,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:34:24" (2/2) ... [2021-07-09 18:34:24,123 INFO L111 eAbstractionObserver]: Analyzing ICFG min-le-max.wvr.bpl [2021-07-09 18:34:24,130 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:34:24,131 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:34:24,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:34:24,132 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:34:24,204 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:34:24,240 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:34:24,255 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:34:24,256 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:34:24,256 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:34:24,256 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:34:24,256 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:34:24,256 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:34:24,256 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:34:24,256 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:34:24,264 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 26 transitions, 76 flow [2021-07-09 18:34:24,291 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 128 states, 127 states have (on average 2.6377952755905514) internal successors, (335), 127 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 127 states have (on average 2.6377952755905514) internal successors, (335), 127 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:34:24,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:24,314 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:24,314 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash 96384597, now seen corresponding path program 1 times [2021-07-09 18:34:24,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:24,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267815978] [2021-07-09 18:34:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:24,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267815978] [2021-07-09 18:34:24,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267815978] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:34:24,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:34:24,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:34:24,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167204556] [2021-07-09 18:34:24,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:34:24,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:24,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:34:24,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:34:24,554 INFO L87 Difference]: Start difference. First operand has 128 states, 127 states have (on average 2.6377952755905514) internal successors, (335), 127 states have internal predecessors, (335), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:24,657 INFO L93 Difference]: Finished difference Result 275 states and 711 transitions. [2021-07-09 18:34:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:34:24,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:34:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:24,673 INFO L225 Difference]: With dead ends: 275 [2021-07-09 18:34:24,673 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:34:24,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:34:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:34:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-07-09 18:34:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5923566878980893) internal successors, (407), 157 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 407 transitions. [2021-07-09 18:34:24,721 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 407 transitions. Word has length 15 [2021-07-09 18:34:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:24,721 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 407 transitions. [2021-07-09 18:34:24,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 407 transitions. [2021-07-09 18:34:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:34:24,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:24,724 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:24,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:34:24,724 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1463666307, now seen corresponding path program 1 times [2021-07-09 18:34:24,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:24,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003016425] [2021-07-09 18:34:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:24,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003016425] [2021-07-09 18:34:24,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003016425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080423846] [2021-07-09 18:34:24,788 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 [2021-07-09 18:34:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:34:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080423846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:34:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630079770] [2021-07-09 18:34:24,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:34:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:34:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:34:24,979 INFO L87 Difference]: Start difference. First operand 158 states and 407 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:25,063 INFO L93 Difference]: Finished difference Result 319 states and 804 transitions. [2021-07-09 18:34:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:34:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:34:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:25,068 INFO L225 Difference]: With dead ends: 319 [2021-07-09 18:34:25,068 INFO L226 Difference]: Without dead ends: 319 [2021-07-09 18:34:25,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:34:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-09 18:34:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 185. [2021-07-09 18:34:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.592391304347826) internal successors, (477), 184 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 477 transitions. [2021-07-09 18:34:25,098 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 477 transitions. Word has length 18 [2021-07-09 18:34:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:25,099 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 477 transitions. [2021-07-09 18:34:25,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 477 transitions. [2021-07-09 18:34:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:34:25,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:25,100 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:25,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:34:25,325 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,326 INFO L82 PathProgramCache]: Analyzing trace with hash -106698002, now seen corresponding path program 1 times [2021-07-09 18:34:25,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298513359] [2021-07-09 18:34:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298513359] [2021-07-09 18:34:25,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298513359] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:34:25,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:34:25,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:34:25,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994051575] [2021-07-09 18:34:25,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:34:25,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:25,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:34:25,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:34:25,355 INFO L87 Difference]: Start difference. First operand 185 states and 477 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:25,387 INFO L93 Difference]: Finished difference Result 193 states and 496 transitions. [2021-07-09 18:34:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:34:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:34:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:25,389 INFO L225 Difference]: With dead ends: 193 [2021-07-09 18:34:25,389 INFO L226 Difference]: Without dead ends: 182 [2021-07-09 18:34:25,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:34:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-09 18:34:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2021-07-09 18:34:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.6402439024390243) internal successors, (433), 164 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 433 transitions. [2021-07-09 18:34:25,399 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 433 transitions. Word has length 18 [2021-07-09 18:34:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:25,399 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 433 transitions. [2021-07-09 18:34:25,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 433 transitions. [2021-07-09 18:34:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:34:25,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:25,401 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:25,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:34:25,401 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2022589248, now seen corresponding path program 2 times [2021-07-09 18:34:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344557069] [2021-07-09 18:34:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:25,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344557069] [2021-07-09 18:34:25,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344557069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:25,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201059705] [2021-07-09 18:34:25,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:25,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:34:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201059705] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:34:25,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:34:25,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-07-09 18:34:25,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279427351] [2021-07-09 18:34:25,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:34:25,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:25,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:34:25,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:34:25,579 INFO L87 Difference]: Start difference. First operand 165 states and 433 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:25,619 INFO L93 Difference]: Finished difference Result 230 states and 611 transitions. [2021-07-09 18:34:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:34:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:34:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:25,622 INFO L225 Difference]: With dead ends: 230 [2021-07-09 18:34:25,622 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 18:34:25,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:34:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 18:34:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2021-07-09 18:34:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.65) internal successors, (477), 180 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 477 transitions. [2021-07-09 18:34:25,633 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 477 transitions. Word has length 18 [2021-07-09 18:34:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:25,633 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 477 transitions. [2021-07-09 18:34:25,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 477 transitions. [2021-07-09 18:34:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:34:25,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:25,635 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] [2021-07-09 18:34:25,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,849 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,849 INFO L82 PathProgramCache]: Analyzing trace with hash -887110656, now seen corresponding path program 1 times [2021-07-09 18:34:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811782427] [2021-07-09 18:34:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:26,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811782427] [2021-07-09 18:34:26,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811782427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113564968] [2021-07-09 18:34:26,021 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 [2021-07-09 18:34:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:34:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:26,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:34:26,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:26,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:34:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:26,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113564968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:26,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:26,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:34:26,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326660896] [2021-07-09 18:34:26,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:34:26,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:34:26,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:34:26,173 INFO L87 Difference]: Start difference. First operand 181 states and 477 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:26,317 INFO L93 Difference]: Finished difference Result 246 states and 658 transitions. [2021-07-09 18:34:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:34:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:34:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:26,318 INFO L225 Difference]: With dead ends: 246 [2021-07-09 18:34:26,319 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 18:34:26,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 18:34:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 18:34:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 18:34:26,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-07-09 18:34:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:26,320 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 18:34:26,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 18:34:26,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 18:34:26,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:26,533 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:34:26,535 INFO L202 PluginConnector]: Adding new model min-le-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:34:26 BasicIcfg [2021-07-09 18:34:26,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:34:26,536 INFO L168 Benchmark]: Toolchain (without parser) took 2718.32 ms. Allocated memory was 196.1 MB in the beginning and 240.1 MB in the end (delta: 44.0 MB). Free memory was 176.0 MB in the beginning and 179.4 MB in the end (delta: -3.4 MB). Peak memory consumption was 41.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:34:26,536 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 196.1 MB. Free memory is still 177.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:34:26,536 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 196.1 MB. Free memory was 176.0 MB in the beginning and 174.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:34:26,536 INFO L168 Benchmark]: Boogie Preprocessor took 16.61 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 173.6 MB in the end (delta: 926.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:34:26,537 INFO L168 Benchmark]: RCFGBuilder took 253.56 ms. Allocated memory is still 196.1 MB. Free memory was 173.5 MB in the beginning and 162.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:34:26,537 INFO L168 Benchmark]: TraceAbstraction took 2416.37 ms. Allocated memory was 196.1 MB in the beginning and 240.1 MB in the end (delta: 44.0 MB). Free memory was 162.0 MB in the beginning and 179.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:34:26,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 196.1 MB. Free memory is still 177.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 196.1 MB. Free memory was 176.0 MB in the beginning and 174.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.61 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 173.6 MB in the end (delta: 926.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 253.56 ms. Allocated memory is still 196.1 MB. Free memory was 173.5 MB in the beginning and 162.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2416.37 ms. Allocated memory was 196.1 MB in the beginning and 240.1 MB in the end (delta: 44.0 MB). Free memory was 162.0 MB in the beginning and 179.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 52]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 41 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2278.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 18.7ms, AutomataDifference: 458.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 103 SDtfs, 176 SDslu, 192 SDs, 0 SdLazy, 160 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 194.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 270.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=185occurred in iteration=2, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 200 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 29.1ms SsaConstructionTime, 90.4ms SatisfiabilityAnalysisTime, 698.3ms InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 684 SizeOfPredicates, 7 NumberOfNonLiveVariables, 149 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 2/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...