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/Problem10_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:02,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:02,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:02,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:02:02,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:02,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:02,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:02,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:02,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:02,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:02,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:02,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:02,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:02,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:02,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:02,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:02,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:02,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:02,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:02,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:02,798 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 [2019-10-15 00:02:02,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:02,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:02,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:02,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:02,820 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:02,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:02,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:02,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:02,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:02,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:02,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:02,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:02,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:02,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:02,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:02,822 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:02,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:02,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:02,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:02,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:02,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:02,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:02,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:02,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:02,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:02,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:02,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:02,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:02,825 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 [2019-10-15 00:02:03,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:03,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:03,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:03,131 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:03,132 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:03,133 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-15 00:02:03,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c755bd261/00a4c98830184b328dd0371b98dbc0e4/FLAG67d0fe505 [2019-10-15 00:02:03,746 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:03,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-15 00:02:03,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c755bd261/00a4c98830184b328dd0371b98dbc0e4/FLAG67d0fe505 [2019-10-15 00:02:03,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c755bd261/00a4c98830184b328dd0371b98dbc0e4 [2019-10-15 00:02:03,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:03,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:04,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:04,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:04,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:04,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:03" (1/1) ... [2019-10-15 00:02:04,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2a3789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04, skipping insertion in model container [2019-10-15 00:02:04,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:03" (1/1) ... [2019-10-15 00:02:04,017 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:04,067 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:04,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:04,576 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:04,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:04,745 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:04,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04 WrapperNode [2019-10-15 00:02:04,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:04,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:04,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:04,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:04,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (1/1) ... [2019-10-15 00:02:04,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:04,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:04,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:04,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:04,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (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 [2019-10-15 00:02:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:04,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:04,937 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:04,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:04,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:04,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:04,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:06,200 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:06,201 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:06,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:06 BoogieIcfgContainer [2019-10-15 00:02:06,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:06,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:06,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:06,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:06,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:03" (1/3) ... [2019-10-15 00:02:06,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286fc848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:06, skipping insertion in model container [2019-10-15 00:02:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:04" (2/3) ... [2019-10-15 00:02:06,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286fc848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:06, skipping insertion in model container [2019-10-15 00:02:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:06" (3/3) ... [2019-10-15 00:02:06,210 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label48.c [2019-10-15 00:02:06,220 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:06,228 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:06,239 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:06,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:06,267 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:06,267 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:06,267 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:06,268 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:06,268 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:06,268 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:06,268 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:02:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 00:02:06,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:06,300 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:06,302 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash 54045006, now seen corresponding path program 1 times [2019-10-15 00:02:06,317 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:06,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752072107] [2019-10-15 00:02:06,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:06,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:06,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:06,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752072107] [2019-10-15 00:02:06,539 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:06,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:06,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718964704] [2019-10-15 00:02:06,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:06,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:06,564 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:02:07,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:07,656 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:02:07,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:07,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 00:02:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:07,695 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:02:07,696 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:02:07,709 INFO L600 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 [2019-10-15 00:02:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:02:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:02:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:02:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:02:07,799 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 13 [2019-10-15 00:02:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:07,800 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:02:07,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:02:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 00:02:07,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:07,808 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:07,809 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 58156773, now seen corresponding path program 1 times [2019-10-15 00:02:07,809 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:07,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391794961] [2019-10-15 00:02:07,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:07,811 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:07,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:08,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391794961] [2019-10-15 00:02:08,109 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:08,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:08,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906549193] [2019-10-15 00:02:08,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:08,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:08,113 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-10-15 00:02:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:09,173 INFO L93 Difference]: Finished difference Result 741 states and 1136 transitions. [2019-10-15 00:02:09,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:09,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2019-10-15 00:02:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:09,178 INFO L225 Difference]: With dead ends: 741 [2019-10-15 00:02:09,178 INFO L226 Difference]: Without dead ends: 453 [2019-10-15 00:02:09,180 INFO L600 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 [2019-10-15 00:02:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-15 00:02:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-15 00:02:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-15 00:02:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-10-15 00:02:09,217 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 86 [2019-10-15 00:02:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:09,218 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-10-15 00:02:09,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-10-15 00:02:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 00:02:09,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:09,222 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:09,222 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1907689263, now seen corresponding path program 1 times [2019-10-15 00:02:09,223 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:09,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861173931] [2019-10-15 00:02:09,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:09,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:09,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:09,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861173931] [2019-10-15 00:02:09,340 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:09,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:09,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115147137] [2019-10-15 00:02:09,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:09,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:09,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:09,343 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 3 states. [2019-10-15 00:02:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:10,026 INFO L93 Difference]: Finished difference Result 1319 states and 1891 transitions. [2019-10-15 00:02:10,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:10,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-15 00:02:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:10,035 INFO L225 Difference]: With dead ends: 1319 [2019-10-15 00:02:10,036 INFO L226 Difference]: Without dead ends: 880 [2019-10-15 00:02:10,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-10-15 00:02:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2019-10-15 00:02:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-15 00:02:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1152 transitions. [2019-10-15 00:02:10,110 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1152 transitions. Word has length 92 [2019-10-15 00:02:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:10,112 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1152 transitions. [2019-10-15 00:02:10,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1152 transitions. [2019-10-15 00:02:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-15 00:02:10,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:10,121 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:10,122 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1492328462, now seen corresponding path program 1 times [2019-10-15 00:02:10,122 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:10,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473712512] [2019-10-15 00:02:10,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:10,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:10,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:10,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473712512] [2019-10-15 00:02:10,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:10,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:10,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114606210] [2019-10-15 00:02:10,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:10,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:10,325 INFO L87 Difference]: Start difference. First operand 880 states and 1152 transitions. Second operand 6 states. [2019-10-15 00:02:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:11,266 INFO L93 Difference]: Finished difference Result 2078 states and 2807 transitions. [2019-10-15 00:02:11,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:11,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-10-15 00:02:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:11,274 INFO L225 Difference]: With dead ends: 2078 [2019-10-15 00:02:11,275 INFO L226 Difference]: Without dead ends: 1204 [2019-10-15 00:02:11,277 INFO L600 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 [2019-10-15 00:02:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2019-10-15 00:02:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1192. [2019-10-15 00:02:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 00:02:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1576 transitions. [2019-10-15 00:02:11,324 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1576 transitions. Word has length 103 [2019-10-15 00:02:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:11,325 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1576 transitions. [2019-10-15 00:02:11,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1576 transitions. [2019-10-15 00:02:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:02:11,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:11,328 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:02:11,329 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash -28083010, now seen corresponding path program 1 times [2019-10-15 00:02:11,329 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:11,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267201971] [2019-10-15 00:02:11,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:11,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:11,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:11,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267201971] [2019-10-15 00:02:11,534 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:11,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:11,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351484282] [2019-10-15 00:02:11,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:11,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:11,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:11,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:11,536 INFO L87 Difference]: Start difference. First operand 1192 states and 1576 transitions. Second operand 6 states. [2019-10-15 00:02:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:12,409 INFO L93 Difference]: Finished difference Result 2688 states and 3628 transitions. [2019-10-15 00:02:12,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:12,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-15 00:02:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:12,425 INFO L225 Difference]: With dead ends: 2688 [2019-10-15 00:02:12,425 INFO L226 Difference]: Without dead ends: 1502 [2019-10-15 00:02:12,429 INFO L600 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 [2019-10-15 00:02:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2019-10-15 00:02:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1339. [2019-10-15 00:02:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-10-15 00:02:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1748 transitions. [2019-10-15 00:02:12,504 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1748 transitions. Word has length 125 [2019-10-15 00:02:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:12,506 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 1748 transitions. [2019-10-15 00:02:12,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1748 transitions. [2019-10-15 00:02:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 00:02:12,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:12,510 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-10-15 00:02:12,511 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1911741586, now seen corresponding path program 1 times [2019-10-15 00:02:12,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:12,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414580226] [2019-10-15 00:02:12,512 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:12,512 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:12,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:12,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414580226] [2019-10-15 00:02:12,774 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:12,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:12,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697809835] [2019-10-15 00:02:12,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:12,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:12,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:12,778 INFO L87 Difference]: Start difference. First operand 1339 states and 1748 transitions. Second operand 6 states. [2019-10-15 00:02:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:13,721 INFO L93 Difference]: Finished difference Result 2692 states and 3545 transitions. [2019-10-15 00:02:13,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:13,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-15 00:02:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:13,730 INFO L225 Difference]: With dead ends: 2692 [2019-10-15 00:02:13,730 INFO L226 Difference]: Without dead ends: 1359 [2019-10-15 00:02:13,734 INFO L600 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 [2019-10-15 00:02:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2019-10-15 00:02:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1204. [2019-10-15 00:02:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2019-10-15 00:02:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1482 transitions. [2019-10-15 00:02:13,779 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1482 transitions. Word has length 149 [2019-10-15 00:02:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:13,779 INFO L462 AbstractCegarLoop]: Abstraction has 1204 states and 1482 transitions. [2019-10-15 00:02:13,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1482 transitions. [2019-10-15 00:02:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-15 00:02:13,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:13,785 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:13,785 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash -782626831, now seen corresponding path program 1 times [2019-10-15 00:02:13,786 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:13,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894057597] [2019-10-15 00:02:13,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:13,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:13,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 00:02:14,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894057597] [2019-10-15 00:02:14,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406028293] [2019-10-15 00:02:14,085 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 [2019-10-15 00:02:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:14,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:14,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:14,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:14,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1114887598] [2019-10-15 00:02:14,621 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 229 [2019-10-15 00:02:14,680 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:14,681 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:02:27,522 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.