/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:56:15,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:56:15,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:56:15,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:56:15,629 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 [2021-06-05 21:56:15,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:56:15,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:56:15,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:56:15,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:56:15,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:56:15,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:56:15,668 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:56:15,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:56:15,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:56:15,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:56:15,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:56:15,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:56:15,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:56:15,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:56:15,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:56:15,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:56:15,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:56:15,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:56:15,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:56:15,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:56:15,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:56:15,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:56:15,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:56:15,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:56:15,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:56:15,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:56:15,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:56:15,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:56:15,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:56:15,997 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:56:15,998 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:56:15,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl [2021-06-05 21:56:15,999 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-subst.wvr.bpl' [2021-06-05 21:56:16,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:56:16,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:56:16,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:56:16,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:56:16,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:56:16,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:56:16,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:56:16,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:56:16,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:56:16,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... [2021-06-05 21:56:16,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:56:16,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:56:16,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:56:16,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:56:16,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:56:16,122 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:56:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:56:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:56:16,123 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:56:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:56:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:56:16,123 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:56:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:56:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:56:16,124 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:56:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:56:16,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:56:16,126 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:56:16,345 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:56:16,345 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:56:16,347 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:56:16 BoogieIcfgContainer [2021-06-05 21:56:16,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:56:16,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:56:16,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:56:16,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:56:16,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:56:16" (1/2) ... [2021-06-05 21:56:16,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55976c0d and model type container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:56:16, skipping insertion in model container [2021-06-05 21:56:16,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:56:16" (2/2) ... [2021-06-05 21:56:16,353 INFO L111 eAbstractionObserver]: Analyzing ICFG container-subst.wvr.bpl [2021-06-05 21:56:16,357 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:56:16,358 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:56:16,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:56:16,358 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:56:16,392 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 21:56:16,409 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 21:56:16,423 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:56:16,423 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:56:16,423 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:56:16,424 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:56:16,424 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:56:16,424 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:56:16,424 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:56:16,424 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:56:16,431 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-06-05 21:56:16,442 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:56:16,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:16,449 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:16,449 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1365396696, now seen corresponding path program 1 times [2021-06-05 21:56:16,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:16,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541867641] [2021-06-05 21:56:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:17,179 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-06-05 21:56:18,361 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 173 DAG size of output: 141 [2021-06-05 21:56:19,013 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72 [2021-06-05 21:56:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:19,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541867641] [2021-06-05 21:56:19,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541867641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:56:19,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:56:19,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:56:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486837348] [2021-06-05 21:56:19,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:56:19,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:56:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:56:19,135 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,503 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 110 [2021-06-05 21:56:19,924 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 124 [2021-06-05 21:56:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:19,953 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 21:56:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:56:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:56:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:19,962 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:56:19,962 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 21:56:19,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1570.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:56:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 21:56:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-06-05 21:56:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-06-05 21:56:19,993 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-06-05 21:56:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:19,993 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-06-05 21:56:19,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-06-05 21:56:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:56:19,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:19,994 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:19,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:56:19,995 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:19,995 INFO L82 PathProgramCache]: Analyzing trace with hash -39432920, now seen corresponding path program 2 times [2021-06-05 21:56:19,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:19,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677830899] [2021-06-05 21:56:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:20,220 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-06-05 21:56:20,382 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-06-05 21:56:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:20,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:20,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677830899] [2021-06-05 21:56:20,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677830899] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:56:20,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:56:20,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:56:20,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162409487] [2021-06-05 21:56:20,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:56:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:20,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:56:20,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:56:20,414 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,551 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 21:56:20,687 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 21:56:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:20,699 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-06-05 21:56:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:56:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:56:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:20,700 INFO L225 Difference]: With dead ends: 93 [2021-06-05 21:56:20,701 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 21:56:20,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 518.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:56:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 21:56:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-06-05 21:56:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-06-05 21:56:20,709 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-06-05 21:56:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:20,709 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-06-05 21:56:20,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-06-05 21:56:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:56:20,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:20,710 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:20,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:56:20,711 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -392767192, now seen corresponding path program 3 times [2021-06-05 21:56:20,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:20,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831962559] [2021-06-05 21:56:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:21,123 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 212 [2021-06-05 21:56:21,529 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 44 [2021-06-05 21:56:21,889 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2021-06-05 21:56:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:21,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:21,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831962559] [2021-06-05 21:56:21,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831962559] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:56:21,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:56:21,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:56:21,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848997823] [2021-06-05 21:56:21,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:56:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:56:21,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:56:21,969 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,098 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 21:56:22,235 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 21:56:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:22,244 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-06-05 21:56:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:56:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:56:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:22,247 INFO L225 Difference]: With dead ends: 80 [2021-06-05 21:56:22,247 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 21:56:22,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1011.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:56:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 21:56:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-06-05 21:56:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-06-05 21:56:22,251 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-06-05 21:56:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:22,251 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-06-05 21:56:22,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-06-05 21:56:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:56:22,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:22,252 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:22,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:56:22,252 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1324864438, now seen corresponding path program 4 times [2021-06-05 21:56:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120522240] [2021-06-05 21:56:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:24,626 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 534 DAG size of output: 292 [2021-06-05 21:56:24,771 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 264 [2021-06-05 21:56:25,635 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 54 [2021-06-05 21:56:25,884 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-05 21:56:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:25,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:25,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120522240] [2021-06-05 21:56:25,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120522240] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:56:25,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:56:25,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:56:25,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341853198] [2021-06-05 21:56:25,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:56:25,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:56:25,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:56:25,953 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:26,088 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 21:56:26,264 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 21:56:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:26,276 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-06-05 21:56:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:56:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:56:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:26,278 INFO L225 Difference]: With dead ends: 56 [2021-06-05 21:56:26,278 INFO L226 Difference]: Without dead ends: 33 [2021-06-05 21:56:26,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1396.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:56:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-05 21:56:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-06-05 21:56:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-06-05 21:56:26,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-06-05 21:56:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:26,281 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-06-05 21:56:26,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-06-05 21:56:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:56:26,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:26,282 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:26,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:56:26,282 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:26,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2000333238, now seen corresponding path program 5 times [2021-06-05 21:56:26,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:26,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301009549] [2021-06-05 21:56:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:26,628 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 147 [2021-06-05 21:56:26,843 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 43 [2021-06-05 21:56:26,949 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 135 [2021-06-05 21:56:27,437 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2021-06-05 21:56:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:27,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:27,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301009549] [2021-06-05 21:56:27,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301009549] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:56:27,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:56:27,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:56:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445647239] [2021-06-05 21:56:27,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:56:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:56:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:56:27,475 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,739 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-06-05 21:56:28,024 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2021-06-05 21:56:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:28,029 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-06-05 21:56:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:56:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:56:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:28,030 INFO L225 Difference]: With dead ends: 48 [2021-06-05 21:56:28,030 INFO L226 Difference]: Without dead ends: 27 [2021-06-05 21:56:28,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1248.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:56:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-06-05 21:56:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-06-05 21:56:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-06-05 21:56:28,032 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-06-05 21:56:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:28,033 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-06-05 21:56:28,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-06-05 21:56:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:56:28,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:28,033 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:28,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:56:28,034 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1966251176, now seen corresponding path program 6 times [2021-06-05 21:56:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380129130] [2021-06-05 21:56:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:35,105 WARN L205 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 415 DAG size of output: 441 [2021-06-05 21:56:35,728 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 398 [2021-06-05 21:56:36,705 WARN L205 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 48 [2021-06-05 21:56:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:36,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:36,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380129130] [2021-06-05 21:56:36,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380129130] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:56:36,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:56:36,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 21:56:36,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745962251] [2021-06-05 21:56:36,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:56:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:56:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:56:36,900 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:37,113 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 21:56:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:37,114 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-06-05 21:56:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:56:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:56:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:37,115 INFO L225 Difference]: With dead ends: 25 [2021-06-05 21:56:37,115 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 21:56:37,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1323.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:56:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 21:56:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 21:56:37,118 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) [2021-06-05 21:56:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 21:56:37,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-06-05 21:56:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:37,118 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 21:56:37,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 21:56:37,119 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 21:56:37,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:56:37,121 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:56:37,123 INFO L202 PluginConnector]: Adding new model container-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:56:37 BasicIcfg [2021-06-05 21:56:37,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:56:37,124 INFO L168 Benchmark]: Toolchain (without parser) took 21089.17 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 710.9 MB). Free memory was 336.2 MB in the beginning and 626.1 MB in the end (delta: -289.9 MB). Peak memory consumption was 420.8 MB. Max. memory is 16.0 GB. [2021-06-05 21:56:37,124 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 356.5 MB. Free memory was 337.4 MB in the beginning and 337.3 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:56:37,125 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 356.5 MB. Free memory was 336.1 MB in the beginning and 334.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:56:37,125 INFO L168 Benchmark]: Boogie Preprocessor took 11.26 ms. Allocated memory is still 356.5 MB. Free memory was 334.7 MB in the beginning and 333.7 MB in the end (delta: 954.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:56:37,125 INFO L168 Benchmark]: RCFGBuilder took 277.21 ms. Allocated memory is still 356.5 MB. Free memory was 333.7 MB in the beginning and 316.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 21:56:37,126 INFO L168 Benchmark]: TraceAbstraction took 20774.57 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 710.9 MB). Free memory was 315.9 MB in the beginning and 626.1 MB in the end (delta: -310.2 MB). Peak memory consumption was 399.8 MB. Max. memory is 16.0 GB. [2021-06-05 21:56:37,128 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 0.14 ms. Allocated memory is still 356.5 MB. Free memory was 337.4 MB in the beginning and 337.3 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 356.5 MB. Free memory was 336.1 MB in the beginning and 334.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.26 ms. Allocated memory is still 356.5 MB. Free memory was 334.7 MB in the beginning and 333.7 MB in the end (delta: 954.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 277.21 ms. Allocated memory is still 356.5 MB. Free memory was 333.7 MB in the beginning and 316.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 20774.57 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 710.9 MB). Free memory was 315.9 MB in the beginning and 626.1 MB in the end (delta: -310.2 MB). Peak memory consumption was 399.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: 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, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20698.0ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 9.4ms, AutomataDifference: 2514.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7069.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 35.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.6ms SsaConstructionTime, 181.2ms SatisfiabilityAnalysisTime, 17773.8ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 4855 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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...