/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:06,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:06,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:06,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:06,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:46:06,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:46:06,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:46:06,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:46:06,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:46:06,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:46:06,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:46:06,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:46:06,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:46:06,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:46:06,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:46:06,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:46:06,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:46:06,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:06,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:06,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:06,612 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 22:46:06,639 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:06,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:06,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:06,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:06,645 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:06,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:06,645 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:06,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:06,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:06,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:06,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:06,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:06,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:06,647 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:06,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:06,647 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:06,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:06,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:06,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:06,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:06,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:06,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:06,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:06,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:06,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:06,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:06,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:06,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:06,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:46:06,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:06,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:06,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:06,971 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:06,972 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:06,973 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-11-06 22:46:07,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dcfa9b88/bd7e11d28b1e4a8d8490765b90ef5631/FLAGc217e14c6 [2019-11-06 22:46:07,615 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:07,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-11-06 22:46:07,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dcfa9b88/bd7e11d28b1e4a8d8490765b90ef5631/FLAGc217e14c6 [2019-11-06 22:46:07,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dcfa9b88/bd7e11d28b1e4a8d8490765b90ef5631 [2019-11-06 22:46:07,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:07,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:07,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:07,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:07,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:07,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:07" (1/1) ... [2019-11-06 22:46:07,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@681add23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07, skipping insertion in model container [2019-11-06 22:46:07,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:07" (1/1) ... [2019-11-06 22:46:07,870 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:07,927 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:08,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:08,653 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:08,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:08,839 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:08,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08 WrapperNode [2019-11-06 22:46:08,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:08,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:08,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:08,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:08,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:08,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:08,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:08,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:08,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:08,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:08,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (1/1) ... [2019-11-06 22:46:09,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:09,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:09,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:09,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:09,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (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 22:46:09,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:09,087 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:09,088 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:09,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:10,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:10,934 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:10,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:10 BoogieIcfgContainer [2019-11-06 22:46:10,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:10,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:10,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:10,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:10,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:07" (1/3) ... [2019-11-06 22:46:10,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d5582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:10, skipping insertion in model container [2019-11-06 22:46:10,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:08" (2/3) ... [2019-11-06 22:46:10,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d5582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:10, skipping insertion in model container [2019-11-06 22:46:10,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:10" (3/3) ... [2019-11-06 22:46:10,945 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label20.c [2019-11-06 22:46:10,955 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:10,964 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:10,976 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:11,006 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:11,006 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:11,007 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:11,007 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:11,007 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:11,007 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:11,007 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:11,008 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 22:46:11,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:11,042 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:11,044 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -960649190, now seen corresponding path program 1 times [2019-11-06 22:46:11,060 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:11,061 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810776570] [2019-11-06 22:46:11,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:11,304 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 22:46:11,304 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810776570] [2019-11-06 22:46:11,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:11,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:11,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298476071] [2019-11-06 22:46:11,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:11,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:11,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:11,334 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:46:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:13,630 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-11-06 22:46:13,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:13,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 22:46:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:13,657 INFO L225 Difference]: With dead ends: 978 [2019-11-06 22:46:13,657 INFO L226 Difference]: Without dead ends: 619 [2019-11-06 22:46:13,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-11-06 22:46:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-11-06 22:46:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-11-06 22:46:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-11-06 22:46:13,762 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 15 [2019-11-06 22:46:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:13,763 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-11-06 22:46:13,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-11-06 22:46:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:46:13,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:13,768 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:46:13,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:13,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1986341175, now seen corresponding path program 1 times [2019-11-06 22:46:13,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:13,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116906483] [2019-11-06 22:46:13,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:14,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116906483] [2019-11-06 22:46:14,022 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:14,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:46:14,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064008499] [2019-11-06 22:46:14,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:46:14,025 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:46:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:14,025 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-11-06 22:46:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:16,003 INFO L93 Difference]: Finished difference Result 2382 states and 3379 transitions. [2019-11-06 22:46:16,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:46:16,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-11-06 22:46:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:16,016 INFO L225 Difference]: With dead ends: 2382 [2019-11-06 22:46:16,017 INFO L226 Difference]: Without dead ends: 1769 [2019-11-06 22:46:16,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:46:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2019-11-06 22:46:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1751. [2019-11-06 22:46:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2019-11-06 22:46:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2367 transitions. [2019-11-06 22:46:16,097 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2367 transitions. Word has length 88 [2019-11-06 22:46:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:16,098 INFO L462 AbstractCegarLoop]: Abstraction has 1751 states and 2367 transitions. [2019-11-06 22:46:16,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:46:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2367 transitions. [2019-11-06 22:46:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:46:16,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:16,105 INFO L410 BasicCegarLoop]: trace histogram [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, 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 22:46:16,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:16,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2070996454, now seen corresponding path program 1 times [2019-11-06 22:46:16,106 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:16,106 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393768421] [2019-11-06 22:46:16,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:16,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393768421] [2019-11-06 22:46:16,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316449224] [2019-11-06 22:46:16,410 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 22:46:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:16,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:46:16,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:16,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:46:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:16,726 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:16,897 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-11-06 22:46:16,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:16,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:16,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:16,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:16,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:46:16,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:16,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:16,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:46:16,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:17,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:17,135 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:46:17,135 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-06 22:46:17,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386002004] [2019-11-06 22:46:17,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:46:17,137 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:17,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:46:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:46:17,138 INFO L87 Difference]: Start difference. First operand 1751 states and 2367 transitions. Second operand 7 states. [2019-11-06 22:46:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:19,813 INFO L93 Difference]: Finished difference Result 5696 states and 8124 transitions. [2019-11-06 22:46:19,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:46:19,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-11-06 22:46:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:19,840 INFO L225 Difference]: With dead ends: 5696 [2019-11-06 22:46:19,841 INFO L226 Difference]: Without dead ends: 3951 [2019-11-06 22:46:19,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:46:19,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2019-11-06 22:46:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3350. [2019-11-06 22:46:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3350 states. [2019-11-06 22:46:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4400 transitions. [2019-11-06 22:46:19,986 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4400 transitions. Word has length 109 [2019-11-06 22:46:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:19,987 INFO L462 AbstractCegarLoop]: Abstraction has 3350 states and 4400 transitions. [2019-11-06 22:46:19,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:46:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4400 transitions. [2019-11-06 22:46:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-06 22:46:19,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:19,999 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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 22:46:20,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:20,205 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1839013324, now seen corresponding path program 1 times [2019-11-06 22:46:20,206 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:20,206 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859669990] [2019-11-06 22:46:20,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:20,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859669990] [2019-11-06 22:46:20,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833908094] [2019-11-06 22:46:20,442 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 22:46:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:20,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:46:20,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:46:20,690 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:46:20,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:46:20,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:46:20,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394186995] [2019-11-06 22:46:20,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:46:20,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:20,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:46:20,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:46:20,830 INFO L87 Difference]: Start difference. First operand 3350 states and 4400 transitions. Second operand 5 states. [2019-11-06 22:46:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:22,589 INFO L93 Difference]: Finished difference Result 7359 states and 9840 transitions. [2019-11-06 22:46:22,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:22,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-11-06 22:46:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:22,611 INFO L225 Difference]: With dead ends: 7359 [2019-11-06 22:46:22,611 INFO L226 Difference]: Without dead ends: 4015 [2019-11-06 22:46:22,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:46:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2019-11-06 22:46:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3962. [2019-11-06 22:46:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3962 states. [2019-11-06 22:46:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 5038 transitions. [2019-11-06 22:46:22,735 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 5038 transitions. Word has length 228 [2019-11-06 22:46:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:22,736 INFO L462 AbstractCegarLoop]: Abstraction has 3962 states and 5038 transitions. [2019-11-06 22:46:22,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:46:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 5038 transitions. [2019-11-06 22:46:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-06 22:46:22,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:22,741 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:46:22,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:46:22,950 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash 516745845, now seen corresponding path program 1 times [2019-11-06 22:46:22,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:22,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681859676] [2019-11-06 22:46:22,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:46:23,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681859676] [2019-11-06 22:46:23,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:23,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:46:23,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664546524] [2019-11-06 22:46:23,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:23,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:23,157 INFO L87 Difference]: Start difference. First operand 3962 states and 5038 transitions. Second operand 3 states. [2019-11-06 22:46:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:24,375 INFO L93 Difference]: Finished difference Result 8309 states and 10883 transitions. [2019-11-06 22:46:24,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:24,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-11-06 22:46:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:24,398 INFO L225 Difference]: With dead ends: 8309 [2019-11-06 22:46:24,399 INFO L226 Difference]: Without dead ends: 4541 [2019-11-06 22:46:24,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2019-11-06 22:46:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 4539. [2019-11-06 22:46:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4539 states. [2019-11-06 22:46:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 5828 transitions. [2019-11-06 22:46:24,506 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 5828 transitions. Word has length 237 [2019-11-06 22:46:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:24,506 INFO L462 AbstractCegarLoop]: Abstraction has 4539 states and 5828 transitions. [2019-11-06 22:46:24,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 5828 transitions. [2019-11-06 22:46:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-06 22:46:24,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:24,513 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:46:24,513 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1474293502, now seen corresponding path program 1 times [2019-11-06 22:46:24,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:24,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308190749] [2019-11-06 22:46:24,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-06 22:46:24,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308190749] [2019-11-06 22:46:24,748 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516246861] [2019-11-06 22:46:24,748 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 22:46:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:24,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:46:24,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:46:24,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:46:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:25,088 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:46:25,246 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-11-06 22:46:25,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:46:25,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:46:25,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:46:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:25,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [52769992] [2019-11-06 22:46:25,928 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 241 [2019-11-06 22:46:25,984 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:46:25,984 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)