/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:31,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:31,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:31,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:08:31,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:08:31,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:08:31,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:08:31,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:08:31,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:31,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:31,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:31,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:31,545 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:31,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:31,545 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:31,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:31,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:31,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:31,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:31,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:31,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:31,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:31,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:31,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:31,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:31,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:31,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:31,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:31,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:31,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:31,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:31,821 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:31,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:31,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:31,838 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:31,838 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:31,839 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2019-11-06 19:08:31,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42bda7207/d8e7c1fca25f41b185340161b3fbb628/FLAGd039d3bc0 [2019-11-06 19:08:32,480 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:32,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2019-11-06 19:08:32,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42bda7207/d8e7c1fca25f41b185340161b3fbb628/FLAGd039d3bc0 [2019-11-06 19:08:32,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42bda7207/d8e7c1fca25f41b185340161b3fbb628 [2019-11-06 19:08:32,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:32,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:32,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:32,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:32,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:32,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:32" (1/1) ... [2019-11-06 19:08:32,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:32, skipping insertion in model container [2019-11-06 19:08:32,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:32" (1/1) ... [2019-11-06 19:08:32,738 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:32,805 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:33,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:33,480 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:33,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:33,778 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:33,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33 WrapperNode [2019-11-06 19:08:33,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:33,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:33,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:33,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:33,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:33,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:33,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:33,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:33,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:33,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:33,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (1/1) ... [2019-11-06 19:08:34,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:34,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:34,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:34,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:34,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (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 [2019-11-06 19:08:34,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:34,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:34,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:34,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:34,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:34,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:34,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:08:35,959 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:08:35,959 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:08:35,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:35 BoogieIcfgContainer [2019-11-06 19:08:35,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:08:35,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:08:35,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:08:35,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:08:35,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:32" (1/3) ... [2019-11-06 19:08:35,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd43c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:35, skipping insertion in model container [2019-11-06 19:08:35,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:33" (2/3) ... [2019-11-06 19:08:35,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd43c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:35, skipping insertion in model container [2019-11-06 19:08:35,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:35" (3/3) ... [2019-11-06 19:08:35,994 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2019-11-06 19:08:36,007 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:08:36,017 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:08:36,029 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:08:36,067 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:08:36,068 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:08:36,068 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:08:36,068 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:08:36,068 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:08:36,068 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:08:36,068 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:08:36,069 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:08:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:08:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 19:08:36,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:36,108 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:36,109 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1626993173, now seen corresponding path program 1 times [2019-11-06 19:08:36,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:36,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757159371] [2019-11-06 19:08:36,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:36,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757159371] [2019-11-06 19:08:36,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:36,475 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:36,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323936816] [2019-11-06 19:08:36,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:36,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:36,500 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:39,718 INFO L93 Difference]: Finished difference Result 998 states and 1793 transitions. [2019-11-06 19:08:39,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:39,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-11-06 19:08:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:39,754 INFO L225 Difference]: With dead ends: 998 [2019-11-06 19:08:39,754 INFO L226 Difference]: Without dead ends: 638 [2019-11-06 19:08:39,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-06 19:08:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621. [2019-11-06 19:08:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-06 19:08:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions. [2019-11-06 19:08:39,881 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 40 [2019-11-06 19:08:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:39,882 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 950 transitions. [2019-11-06 19:08:39,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions. [2019-11-06 19:08:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 19:08:39,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:39,888 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:39,888 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1781272370, now seen corresponding path program 1 times [2019-11-06 19:08:39,889 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:39,889 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556047850] [2019-11-06 19:08:39,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:40,226 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556047850] [2019-11-06 19:08:40,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:40,226 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:40,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129374701] [2019-11-06 19:08:40,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:40,229 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:40,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:40,230 INFO L87 Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states. [2019-11-06 19:08:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:44,142 INFO L93 Difference]: Finished difference Result 2487 states and 4246 transitions. [2019-11-06 19:08:44,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:08:44,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2019-11-06 19:08:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:44,176 INFO L225 Difference]: With dead ends: 2487 [2019-11-06 19:08:44,176 INFO L226 Difference]: Without dead ends: 1872 [2019-11-06 19:08:44,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2019-11-06 19:08:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816. [2019-11-06 19:08:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-11-06 19:08:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2598 transitions. [2019-11-06 19:08:44,329 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2598 transitions. Word has length 110 [2019-11-06 19:08:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:44,331 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2598 transitions. [2019-11-06 19:08:44,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2598 transitions. [2019-11-06 19:08:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 19:08:44,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:44,344 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:44,344 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash 559014170, now seen corresponding path program 1 times [2019-11-06 19:08:44,345 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:44,345 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081985055] [2019-11-06 19:08:44,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:44,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081985055] [2019-11-06 19:08:44,623 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:44,624 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:44,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324770617] [2019-11-06 19:08:44,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:44,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:44,626 INFO L87 Difference]: Start difference. First operand 1816 states and 2598 transitions. Second operand 8 states. [2019-11-06 19:08:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:47,390 INFO L93 Difference]: Finished difference Result 5266 states and 7937 transitions. [2019-11-06 19:08:47,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:47,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 120 [2019-11-06 19:08:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:47,420 INFO L225 Difference]: With dead ends: 5266 [2019-11-06 19:08:47,421 INFO L226 Difference]: Without dead ends: 3456 [2019-11-06 19:08:47,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2019-11-06 19:08:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 3233. [2019-11-06 19:08:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2019-11-06 19:08:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions. [2019-11-06 19:08:47,566 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 120 [2019-11-06 19:08:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:47,569 INFO L462 AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions. [2019-11-06 19:08:47,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions. [2019-11-06 19:08:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 19:08:47,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:47,580 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:47,580 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 384966816, now seen corresponding path program 1 times [2019-11-06 19:08:47,581 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:47,581 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406206669] [2019-11-06 19:08:47,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:47,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406206669] [2019-11-06 19:08:47,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079098615] [2019-11-06 19:08:47,974 INFO L94 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 [2019-11-06 19:08:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:48,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:48,148 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:48,148 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:08:48,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959265197] [2019-11-06 19:08:48,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:48,150 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:48,151 INFO L87 Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states. [2019-11-06 19:08:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:50,516 INFO L93 Difference]: Finished difference Result 6540 states and 9941 transitions. [2019-11-06 19:08:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:08:50,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 183 [2019-11-06 19:08:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:50,537 INFO L225 Difference]: With dead ends: 6540 [2019-11-06 19:08:50,538 INFO L226 Difference]: Without dead ends: 3313 [2019-11-06 19:08:50,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2019-11-06 19:08:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993. [2019-11-06 19:08:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2019-11-06 19:08:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3904 transitions. [2019-11-06 19:08:50,644 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 3904 transitions. Word has length 183 [2019-11-06 19:08:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:50,645 INFO L462 AbstractCegarLoop]: Abstraction has 2993 states and 3904 transitions. [2019-11-06 19:08:50,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 3904 transitions. [2019-11-06 19:08:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 19:08:50,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:50,650 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:50,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:50,853 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1968960108, now seen corresponding path program 1 times [2019-11-06 19:08:50,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:50,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53026927] [2019-11-06 19:08:50,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:51,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53026927] [2019-11-06 19:08:51,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158407162] [2019-11-06 19:08:51,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:51,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:51,309 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:51,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:08:51,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287807965] [2019-11-06 19:08:51,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:51,311 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:51,311 INFO L87 Difference]: Start difference. First operand 2993 states and 3904 transitions. Second operand 3 states. [2019-11-06 19:08:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:52,331 INFO L93 Difference]: Finished difference Result 7515 states and 10042 transitions. [2019-11-06 19:08:52,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:52,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-11-06 19:08:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:52,352 INFO L225 Difference]: With dead ends: 7515 [2019-11-06 19:08:52,353 INFO L226 Difference]: Without dead ends: 4528 [2019-11-06 19:08:52,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2019-11-06 19:08:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 4528. [2019-11-06 19:08:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4528 states. [2019-11-06 19:08:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 5974 transitions. [2019-11-06 19:08:52,473 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 5974 transitions. Word has length 193 [2019-11-06 19:08:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:52,559 INFO L462 AbstractCegarLoop]: Abstraction has 4528 states and 5974 transitions. [2019-11-06 19:08:52,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 5974 transitions. [2019-11-06 19:08:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-06 19:08:52,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:52,567 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:52,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:52,771 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038762, now seen corresponding path program 1 times [2019-11-06 19:08:52,772 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:52,772 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867668082] [2019-11-06 19:08:52,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:53,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867668082] [2019-11-06 19:08:53,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78925263] [2019-11-06 19:08:53,120 INFO L94 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 [2019-11-06 19:08:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:53,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:53,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:53,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 19:08:53,353 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:53,353 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-11-06 19:08:53,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104417086] [2019-11-06 19:08:53,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:53,355 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:53,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:53,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:53,355 INFO L87 Difference]: Start difference. First operand 4528 states and 5974 transitions. Second operand 5 states. [2019-11-06 19:08:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:55,002 INFO L93 Difference]: Finished difference Result 9113 states and 12144 transitions. [2019-11-06 19:08:55,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:55,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2019-11-06 19:08:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:55,021 INFO L225 Difference]: With dead ends: 9113 [2019-11-06 19:08:55,022 INFO L226 Difference]: Without dead ends: 4591 [2019-11-06 19:08:55,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:08:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2019-11-06 19:08:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4548. [2019-11-06 19:08:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4548 states. [2019-11-06 19:08:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 6010 transitions. [2019-11-06 19:08:55,144 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 6010 transitions. Word has length 215 [2019-11-06 19:08:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:55,145 INFO L462 AbstractCegarLoop]: Abstraction has 4548 states and 6010 transitions. [2019-11-06 19:08:55,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 6010 transitions. [2019-11-06 19:08:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-06 19:08:55,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:55,153 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:55,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:55,357 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:55,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1219984608, now seen corresponding path program 1 times [2019-11-06 19:08:55,358 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:55,358 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280515668] [2019-11-06 19:08:55,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 19:08:55,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280515668] [2019-11-06 19:08:55,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980425286] [2019-11-06 19:08:55,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:55,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:08:55,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:55,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:55,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:57,977 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2019-11-06 19:09:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 19:09:00,217 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:00,217 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 19:09:00,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054452297] [2019-11-06 19:09:00,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 19:09:00,218 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:00,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 19:09:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2019-11-06 19:09:00,219 INFO L87 Difference]: Start difference. First operand 4548 states and 6010 transitions. Second operand 10 states.