/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/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:58:04,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:58:04,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:58:04,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:58:04,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:58:04,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:58:04,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:58:04,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:58:04,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:58:04,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:58:04,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:58:04,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:58:04,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:58:04,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:58:04,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:58:04,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:58:04,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:58:04,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:58:04,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:58:04,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:58:04,775 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 22:58:04,810 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:58:04,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:58:04,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:58:04,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:58:04,815 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:58:04,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:58:04,815 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:58:04,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:58:04,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:58:04,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:58:04,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:58:04,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:58:04,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:58:04,817 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:58:04,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:58:04,817 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:58:04,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:58:04,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:58:04,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:58:04,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:58:04,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:58:04,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:58:04,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:58:04,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:58:04,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:58:04,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:58:04,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:58:04,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:58:04,821 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 22:58:05,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:58:05,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:58:05,117 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:58:05,118 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:58:05,119 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:58:05,119 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-11-06 22:58:05,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035d86f72/57fee47dff2544ebbdd0a9cb3e5db2fb/FLAG4c97a063f [2019-11-06 22:58:05,899 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:58:05,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-11-06 22:58:05,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035d86f72/57fee47dff2544ebbdd0a9cb3e5db2fb/FLAG4c97a063f [2019-11-06 22:58:06,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035d86f72/57fee47dff2544ebbdd0a9cb3e5db2fb [2019-11-06 22:58:06,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:58:06,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:58:06,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:06,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:58:06,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:58:06,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:06" (1/1) ... [2019-11-06 22:58:06,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e5946d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:06, skipping insertion in model container [2019-11-06 22:58:06,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:06" (1/1) ... [2019-11-06 22:58:06,058 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:58:06,181 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:58:07,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:07,516 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:58:07,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:58:08,015 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:58:08,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08 WrapperNode [2019-11-06 22:58:08,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:58:08,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:58:08,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:58:08,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:58:08,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (1/1) ... [2019-11-06 22:58:08,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:58:08,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:58:08,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:58:08,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:58:08,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (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 22:58:08,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:58:08,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:58:08,293 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:58:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:58:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:58:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:58:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:58:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:58:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:58:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:58:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:58:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:58:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:58:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:58:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:58:11,904 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:58:11,904 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:58:11,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:11 BoogieIcfgContainer [2019-11-06 22:58:11,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:58:11,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:58:11,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:58:11,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:58:11,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:06" (1/3) ... [2019-11-06 22:58:11,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66907145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:11, skipping insertion in model container [2019-11-06 22:58:11,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:08" (2/3) ... [2019-11-06 22:58:11,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66907145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:11, skipping insertion in model container [2019-11-06 22:58:11,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:11" (3/3) ... [2019-11-06 22:58:11,924 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-11-06 22:58:11,936 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:58:11,948 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:58:11,960 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:58:12,004 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:58:12,004 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:58:12,004 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:58:12,005 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:58:12,005 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:58:12,005 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:58:12,005 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:58:12,005 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:58:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:58:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 22:58:12,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:12,069 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, 1, 1, 1, 1, 1] [2019-11-06 22:58:12,071 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash 118737362, now seen corresponding path program 1 times [2019-11-06 22:58:12,085 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:12,085 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891168242] [2019-11-06 22:58:12,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:12,435 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 22:58:12,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891168242] [2019-11-06 22:58:12,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:12,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:58:12,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669982672] [2019-11-06 22:58:12,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:58:12,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:58:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:12,465 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:58:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:17,003 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:58:17,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:58:17,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-11-06 22:58:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:17,042 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:58:17,042 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:58:17,052 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 22:58:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:58:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:58:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:58:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-11-06 22:58:17,209 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 69 [2019-11-06 22:58:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:17,210 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-11-06 22:58:17,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:58:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-11-06 22:58:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:58:17,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:17,217 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:17,218 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:17,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1328569434, now seen corresponding path program 1 times [2019-11-06 22:58:17,219 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:17,219 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682220449] [2019-11-06 22:58:17,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:17,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682220449] [2019-11-06 22:58:17,447 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:17,447 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:17,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718096957] [2019-11-06 22:58:17,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:17,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:17,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:17,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:17,450 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 6 states. [2019-11-06 22:58:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:22,638 INFO L93 Difference]: Finished difference Result 4291 states and 7809 transitions. [2019-11-06 22:58:22,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:22,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-11-06 22:58:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:22,663 INFO L225 Difference]: With dead ends: 4291 [2019-11-06 22:58:22,663 INFO L226 Difference]: Without dead ends: 2885 [2019-11-06 22:58:22,667 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 22:58:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-11-06 22:58:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2864. [2019-11-06 22:58:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:58:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4821 transitions. [2019-11-06 22:58:22,752 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4821 transitions. Word has length 157 [2019-11-06 22:58:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:22,752 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4821 transitions. [2019-11-06 22:58:22,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4821 transitions. [2019-11-06 22:58:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-06 22:58:22,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:22,758 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, 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] [2019-11-06 22:58:22,759 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1960156325, now seen corresponding path program 1 times [2019-11-06 22:58:22,759 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:22,760 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244675397] [2019-11-06 22:58:22,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:22,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244675397] [2019-11-06 22:58:22,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:22,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:22,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741650259] [2019-11-06 22:58:22,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:22,994 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:22,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:22,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:22,995 INFO L87 Difference]: Start difference. First operand 2864 states and 4821 transitions. Second operand 6 states. [2019-11-06 22:58:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:27,919 INFO L93 Difference]: Finished difference Result 6538 states and 10942 transitions. [2019-11-06 22:58:27,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:27,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2019-11-06 22:58:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:27,946 INFO L225 Difference]: With dead ends: 6538 [2019-11-06 22:58:27,947 INFO L226 Difference]: Without dead ends: 3680 [2019-11-06 22:58:27,954 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 22:58:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2019-11-06 22:58:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 3624. [2019-11-06 22:58:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3624 states. [2019-11-06 22:58:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 5583 transitions. [2019-11-06 22:58:28,070 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 5583 transitions. Word has length 204 [2019-11-06 22:58:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:28,072 INFO L462 AbstractCegarLoop]: Abstraction has 3624 states and 5583 transitions. [2019-11-06 22:58:28,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 5583 transitions. [2019-11-06 22:58:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-06 22:58:28,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:28,078 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, 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] [2019-11-06 22:58:28,078 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1938661825, now seen corresponding path program 1 times [2019-11-06 22:58:28,079 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:28,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385482905] [2019-11-06 22:58:28,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:28,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385482905] [2019-11-06 22:58:28,301 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:28,301 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:28,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711855134] [2019-11-06 22:58:28,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:28,302 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:28,303 INFO L87 Difference]: Start difference. First operand 3624 states and 5583 transitions. Second operand 6 states. [2019-11-06 22:58:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:33,214 INFO L93 Difference]: Finished difference Result 9481 states and 14567 transitions. [2019-11-06 22:58:33,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:33,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2019-11-06 22:58:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:33,246 INFO L225 Difference]: With dead ends: 9481 [2019-11-06 22:58:33,246 INFO L226 Difference]: Without dead ends: 5863 [2019-11-06 22:58:33,255 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 22:58:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2019-11-06 22:58:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5821. [2019-11-06 22:58:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5821 states. [2019-11-06 22:58:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 7606 transitions. [2019-11-06 22:58:33,380 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 7606 transitions. Word has length 206 [2019-11-06 22:58:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:33,380 INFO L462 AbstractCegarLoop]: Abstraction has 5821 states and 7606 transitions. [2019-11-06 22:58:33,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 7606 transitions. [2019-11-06 22:58:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-11-06 22:58:33,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:33,386 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, 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, 1, 1, 1, 1, 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 22:58:33,386 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:33,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1498580902, now seen corresponding path program 1 times [2019-11-06 22:58:33,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:33,387 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831244448] [2019-11-06 22:58:33,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-06 22:58:33,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831244448] [2019-11-06 22:58:33,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:33,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:58:33,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363047493] [2019-11-06 22:58:33,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:58:33,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:33,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:58:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:58:33,599 INFO L87 Difference]: Start difference. First operand 5821 states and 7606 transitions. Second operand 4 states. [2019-11-06 22:58:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:40,892 INFO L93 Difference]: Finished difference Result 22350 states and 29870 transitions. [2019-11-06 22:58:40,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:58:40,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 263 [2019-11-06 22:58:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:40,955 INFO L225 Difference]: With dead ends: 22350 [2019-11-06 22:58:40,955 INFO L226 Difference]: Without dead ends: 16535 [2019-11-06 22:58:40,972 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 22:58:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16535 states. [2019-11-06 22:58:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16535 to 16535. [2019-11-06 22:58:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16535 states. [2019-11-06 22:58:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16535 states to 16535 states and 21001 transitions. [2019-11-06 22:58:41,334 INFO L78 Accepts]: Start accepts. Automaton has 16535 states and 21001 transitions. Word has length 263 [2019-11-06 22:58:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:41,336 INFO L462 AbstractCegarLoop]: Abstraction has 16535 states and 21001 transitions. [2019-11-06 22:58:41,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:58:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 16535 states and 21001 transitions. [2019-11-06 22:58:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-11-06 22:58:41,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:41,347 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:41,347 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:41,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:41,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2032440766, now seen corresponding path program 1 times [2019-11-06 22:58:41,348 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:41,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039427580] [2019-11-06 22:58:41,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 165 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:41,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039427580] [2019-11-06 22:58:41,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288306081] [2019-11-06 22:58:41,689 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 22:58:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:41,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:58:41,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-11-06 22:58:42,030 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-11-06 22:58:42,172 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:58:42,173 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:58:42,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233540789] [2019-11-06 22:58:42,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:58:42,177 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:58:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:58:42,179 INFO L87 Difference]: Start difference. First operand 16535 states and 21001 transitions. Second operand 4 states.