/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/Problem16_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:29,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:29,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:29,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:54:29,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:29,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:29,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:29,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:29,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:29,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:29,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:29,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:29,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:29,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:29,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:29,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:29,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:29,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:29,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:29,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:29,653 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 22:54:29,680 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:29,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:29,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:29,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:29,682 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:29,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:29,682 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:29,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:29,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:29,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:29,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:29,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:29,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:29,683 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:29,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:29,684 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:29,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:29,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:29,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:29,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:29,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:29,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:29,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:29,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:29,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:29,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:29,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:29,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:29,686 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 22:54:29,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:29,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:29,986 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:29,988 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:29,989 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:29,989 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-11-06 22:54:30,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601067687/a85fcfbba11a41c78fd720bc93b471a1/FLAG3c203934a [2019-11-06 22:54:30,672 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:30,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-11-06 22:54:30,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601067687/a85fcfbba11a41c78fd720bc93b471a1/FLAG3c203934a [2019-11-06 22:54:30,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601067687/a85fcfbba11a41c78fd720bc93b471a1 [2019-11-06 22:54:30,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:30,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:30,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:30,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:30,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:30,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:30" (1/1) ... [2019-11-06 22:54:30,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:30, skipping insertion in model container [2019-11-06 22:54:30,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:30" (1/1) ... [2019-11-06 22:54:30,918 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:30,996 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:31,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:31,842 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:32,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:32,198 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:32,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32 WrapperNode [2019-11-06 22:54:32,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:32,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:32,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:32,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:32,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (1/1) ... [2019-11-06 22:54:32,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:32,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:32,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:32,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:32,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (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 22:54:32,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:32,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:32,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:32,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:32,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:32,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:34,787 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:34,791 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:34,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:34 BoogieIcfgContainer [2019-11-06 22:54:34,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:34,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:34,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:34,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:34,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:30" (1/3) ... [2019-11-06 22:54:34,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1703f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:34, skipping insertion in model container [2019-11-06 22:54:34,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:32" (2/3) ... [2019-11-06 22:54:34,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1703f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:34, skipping insertion in model container [2019-11-06 22:54:34,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:34" (3/3) ... [2019-11-06 22:54:34,806 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-11-06 22:54:34,820 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:34,834 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:34,846 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:34,893 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:34,893 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:34,893 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:34,894 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:34,894 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:34,894 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:34,895 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:34,895 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:54:34,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:34,940 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, 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 22:54:34,942 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:34,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:34,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1802126811, now seen corresponding path program 1 times [2019-11-06 22:54:34,957 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:34,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912991116] [2019-11-06 22:54:34,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:35,288 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 22:54:35,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912991116] [2019-11-06 22:54:35,290 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:35,290 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:35,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29765734] [2019-11-06 22:54:35,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:35,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:35,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:35,316 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:37,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:37,697 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:37,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:37,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-11-06 22:54:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:37,722 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:37,723 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:37,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:54:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:54:37,832 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 64 [2019-11-06 22:54:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:37,833 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:54:37,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:54:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:54:37,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:37,840 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, 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] [2019-11-06 22:54:37,841 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2014427524, now seen corresponding path program 1 times [2019-11-06 22:54:37,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:37,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056611297] [2019-11-06 22:54:37,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:38,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056611297] [2019-11-06 22:54:38,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:38,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:38,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407400373] [2019-11-06 22:54:38,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:38,073 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:38,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:38,074 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 6 states. [2019-11-06 22:54:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:40,845 INFO L93 Difference]: Finished difference Result 2063 states and 3618 transitions. [2019-11-06 22:54:40,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:40,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-11-06 22:54:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:40,858 INFO L225 Difference]: With dead ends: 2063 [2019-11-06 22:54:40,858 INFO L226 Difference]: Without dead ends: 1387 [2019-11-06 22:54:40,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2019-11-06 22:54:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1372. [2019-11-06 22:54:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:54:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2274 transitions. [2019-11-06 22:54:40,923 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2274 transitions. Word has length 134 [2019-11-06 22:54:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:40,924 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2274 transitions. [2019-11-06 22:54:40,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2274 transitions. [2019-11-06 22:54:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:54:40,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:40,928 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, 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] [2019-11-06 22:54:40,928 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:40,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2143421116, now seen corresponding path program 1 times [2019-11-06 22:54:40,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:40,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557354121] [2019-11-06 22:54:40,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:41,139 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557354121] [2019-11-06 22:54:41,140 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:41,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:41,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538597917] [2019-11-06 22:54:41,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:41,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:41,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:41,145 INFO L87 Difference]: Start difference. First operand 1372 states and 2274 transitions. Second operand 6 states. [2019-11-06 22:54:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:44,032 INFO L93 Difference]: Finished difference Result 3466 states and 5799 transitions. [2019-11-06 22:54:44,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:44,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-11-06 22:54:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:44,057 INFO L225 Difference]: With dead ends: 3466 [2019-11-06 22:54:44,058 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 22:54:44,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 22:54:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2073. [2019-11-06 22:54:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-11-06 22:54:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3322 transitions. [2019-11-06 22:54:44,154 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3322 transitions. Word has length 138 [2019-11-06 22:54:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:44,155 INFO L462 AbstractCegarLoop]: Abstraction has 2073 states and 3322 transitions. [2019-11-06 22:54:44,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3322 transitions. [2019-11-06 22:54:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 22:54:44,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:44,165 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, 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] [2019-11-06 22:54:44,165 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1919929679, now seen corresponding path program 1 times [2019-11-06 22:54:44,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:44,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028743131] [2019-11-06 22:54:44,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:44,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028743131] [2019-11-06 22:54:44,400 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:44,400 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:44,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870058709] [2019-11-06 22:54:44,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:44,401 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:44,402 INFO L87 Difference]: Start difference. First operand 2073 states and 3322 transitions. Second operand 6 states. [2019-11-06 22:54:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:47,638 INFO L93 Difference]: Finished difference Result 5216 states and 8462 transitions. [2019-11-06 22:54:47,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:47,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2019-11-06 22:54:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:47,661 INFO L225 Difference]: With dead ends: 5216 [2019-11-06 22:54:47,661 INFO L226 Difference]: Without dead ends: 3149 [2019-11-06 22:54:47,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-11-06 22:54:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3128. [2019-11-06 22:54:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2019-11-06 22:54:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4658 transitions. [2019-11-06 22:54:47,760 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4658 transitions. Word has length 169 [2019-11-06 22:54:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:47,761 INFO L462 AbstractCegarLoop]: Abstraction has 3128 states and 4658 transitions. [2019-11-06 22:54:47,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4658 transitions. [2019-11-06 22:54:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-06 22:54:47,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:47,766 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, 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, 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 22:54:47,766 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1854023577, now seen corresponding path program 1 times [2019-11-06 22:54:47,767 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:47,768 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306028635] [2019-11-06 22:54:47,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:48,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306028635] [2019-11-06 22:54:48,247 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:48,247 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:48,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450312643] [2019-11-06 22:54:48,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:48,249 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:48,250 INFO L87 Difference]: Start difference. First operand 3128 states and 4658 transitions. Second operand 6 states. [2019-11-06 22:54:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:53,371 INFO L93 Difference]: Finished difference Result 10089 states and 15852 transitions. [2019-11-06 22:54:53,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:53,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 213 [2019-11-06 22:54:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:53,414 INFO L225 Difference]: With dead ends: 10089 [2019-11-06 22:54:53,414 INFO L226 Difference]: Without dead ends: 6967 [2019-11-06 22:54:53,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2019-11-06 22:54:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6961. [2019-11-06 22:54:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2019-11-06 22:54:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10570 transitions. [2019-11-06 22:54:53,657 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10570 transitions. Word has length 213 [2019-11-06 22:54:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:53,658 INFO L462 AbstractCegarLoop]: Abstraction has 6961 states and 10570 transitions. [2019-11-06 22:54:53,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10570 transitions. [2019-11-06 22:54:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-11-06 22:54:53,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:53,675 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:53,675 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -37255589, now seen corresponding path program 1 times [2019-11-06 22:54:53,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:53,676 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053366503] [2019-11-06 22:54:53,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 114 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:53,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053366503] [2019-11-06 22:54:53,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574239085] [2019-11-06 22:54:53,984 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 22:54:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:54,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:54:54,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 22:54:54,491 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 114 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:54,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:54:54,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-06 22:54:54,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922988413] [2019-11-06 22:54:54,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:54,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:54:54,751 INFO L87 Difference]: Start difference. First operand 6961 states and 10570 transitions. Second operand 5 states. [2019-11-06 22:54:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:57,420 INFO L93 Difference]: Finished difference Result 16062 states and 25088 transitions. [2019-11-06 22:54:57,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:54:57,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-11-06 22:54:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:57,486 INFO L225 Difference]: With dead ends: 16062 [2019-11-06 22:54:57,486 INFO L226 Difference]: Without dead ends: 9107 [2019-11-06 22:54:57,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 666 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:54:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9107 states. [2019-11-06 22:54:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9107 to 9028. [2019-11-06 22:54:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9028 states. [2019-11-06 22:54:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9028 states to 9028 states and 12595 transitions. [2019-11-06 22:54:57,867 INFO L78 Accepts]: Start accepts. Automaton has 9028 states and 12595 transitions. Word has length 336 [2019-11-06 22:54:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:57,867 INFO L462 AbstractCegarLoop]: Abstraction has 9028 states and 12595 transitions. [2019-11-06 22:54:57,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 9028 states and 12595 transitions. [2019-11-06 22:54:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-11-06 22:54:57,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:57,886 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, 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, 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] [2019-11-06 22:54:58,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:58,091 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1591738743, now seen corresponding path program 1 times [2019-11-06 22:54:58,092 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:58,092 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916824476] [2019-11-06 22:54:58,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 114 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:58,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916824476] [2019-11-06 22:54:58,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122252842] [2019-11-06 22:54:58,553 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 22:54:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:58,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:54:58,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 22:54:58,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 114 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:59,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:54:59,224 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-06 22:54:59,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620409270] [2019-11-06 22:54:59,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:59,225 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:59,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:54:59,226 INFO L87 Difference]: Start difference. First operand 9028 states and 12595 transitions. Second operand 5 states. [2019-11-06 22:55:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:02,375 INFO L93 Difference]: Finished difference Result 20890 states and 29869 transitions. [2019-11-06 22:55:02,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:55:02,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 396 [2019-11-06 22:55:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:02,420 INFO L225 Difference]: With dead ends: 20890 [2019-11-06 22:55:02,420 INFO L226 Difference]: Without dead ends: 11868 [2019-11-06 22:55:02,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 787 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:55:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11868 states. [2019-11-06 22:55:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11868 to 11156. [2019-11-06 22:55:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11156 states. [2019-11-06 22:55:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 15524 transitions. [2019-11-06 22:55:02,899 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 15524 transitions. Word has length 396 [2019-11-06 22:55:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:02,900 INFO L462 AbstractCegarLoop]: Abstraction has 11156 states and 15524 transitions. [2019-11-06 22:55:02,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 15524 transitions. [2019-11-06 22:55:02,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2019-11-06 22:55:02,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:02,922 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:03,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:03,134 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash -591869981, now seen corresponding path program 1 times [2019-11-06 22:55:03,136 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:03,138 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428458209] [2019-11-06 22:55:03,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 264 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 22:55:04,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428458209] [2019-11-06 22:55:04,312 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340950073] [2019-11-06 22:55:04,312 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 22:55:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:04,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:04,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 22:55:04,645 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 264 proven. 74 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 22:55:04,991 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1692382400] [2019-11-06 22:55:04,996 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 428 [2019-11-06 22:55:05,051 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:05,051 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)