/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:16:20,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:16:20,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:16:20,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:16:20,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:16:20,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:16:20,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:16:20,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:16:20,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:16:20,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:16:20,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:16:20,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:16:20,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:16:20,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:16:20,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:16:20,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:16:20,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:16:20,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:16:20,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:16:20,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:16:20,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:16:20,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:16:20,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:16:20,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:16:20,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:16:20,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:16:20,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:16:20,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:16:20,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:16:20,103 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:16:20,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:16:20,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:16:20,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:16:20,105 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:16:20,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:16:20,106 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:16:20,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:16:20,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:16:20,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:16:20,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:16:20,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:16:20,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:16:20,109 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:16:20,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:16:20,109 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:16:20,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:16:20,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:16:20,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:16:20,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:16:20,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:16:20,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:20,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:16:20,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:16:20,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:16:20,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:16:20,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:16:20,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:16:20,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:16:20,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:16:20,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:16:20,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:16:20,469 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:16:20,470 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:16:20,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-11-06 19:16:20,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c54cf9aa9/f8823d1b72d54131963c1d86d18fe440/FLAGbc9199d51 [2019-11-06 19:16:21,239 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:16:21,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-11-06 19:16:21,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c54cf9aa9/f8823d1b72d54131963c1d86d18fe440/FLAGbc9199d51 [2019-11-06 19:16:21,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c54cf9aa9/f8823d1b72d54131963c1d86d18fe440 [2019-11-06 19:16:21,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:16:21,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:16:21,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:21,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:16:21,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:16:21,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:21" (1/1) ... [2019-11-06 19:16:21,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:21, skipping insertion in model container [2019-11-06 19:16:21,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:16:21" (1/1) ... [2019-11-06 19:16:21,475 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:16:21,564 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:16:22,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:22,523 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:16:22,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:16:22,812 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:16:22,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22 WrapperNode [2019-11-06 19:16:22,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:16:22,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:16:22,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:16:22,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:16:22,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:22,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:22,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:22,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:22,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:22,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:23,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... [2019-11-06 19:16:23,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:16:23,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:16:23,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:16:23,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:16:23,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:16:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:16:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:16:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:16:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:16:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:16:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:16:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:16:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:16:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:16:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:16:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:16:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:16:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:16:26,621 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:16:26,622 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:16:26,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:26 BoogieIcfgContainer [2019-11-06 19:16:26,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:16:26,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:16:26,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:16:26,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:16:26,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:16:21" (1/3) ... [2019-11-06 19:16:26,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b9d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:26, skipping insertion in model container [2019-11-06 19:16:26,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:16:22" (2/3) ... [2019-11-06 19:16:26,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b9d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:16:26, skipping insertion in model container [2019-11-06 19:16:26,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:16:26" (3/3) ... [2019-11-06 19:16:26,631 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label49.c [2019-11-06 19:16:26,641 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:16:26,650 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:16:26,662 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:16:26,694 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:16:26,694 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:16:26,694 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:16:26,694 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:16:26,694 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:16:26,695 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:16:26,695 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:16:26,695 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:16:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:16:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 19:16:26,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:26,735 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] [2019-11-06 19:16:26,737 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1661413296, now seen corresponding path program 1 times [2019-11-06 19:16:26,753 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:26,753 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384519418] [2019-11-06 19:16:26,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:27,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384519418] [2019-11-06 19:16:27,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:27,187 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:16:27,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009522261] [2019-11-06 19:16:27,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:27,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:16:27,213 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:16:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:34,859 INFO L93 Difference]: Finished difference Result 1568 states and 2863 transitions. [2019-11-06 19:16:34,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:34,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-11-06 19:16:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:34,904 INFO L225 Difference]: With dead ends: 1568 [2019-11-06 19:16:34,904 INFO L226 Difference]: Without dead ends: 1048 [2019-11-06 19:16:34,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2019-11-06 19:16:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1025. [2019-11-06 19:16:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2019-11-06 19:16:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1590 transitions. [2019-11-06 19:16:35,086 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1590 transitions. Word has length 58 [2019-11-06 19:16:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:35,087 INFO L462 AbstractCegarLoop]: Abstraction has 1025 states and 1590 transitions. [2019-11-06 19:16:35,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1590 transitions. [2019-11-06 19:16:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 19:16:35,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:35,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:35,096 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1221807989, now seen corresponding path program 1 times [2019-11-06 19:16:35,097 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:35,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192258696] [2019-11-06 19:16:35,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:35,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192258696] [2019-11-06 19:16:35,447 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:35,447 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:16:35,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839269225] [2019-11-06 19:16:35,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:16:35,450 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:16:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:35,451 INFO L87 Difference]: Start difference. First operand 1025 states and 1590 transitions. Second operand 8 states. [2019-11-06 19:16:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:41,028 INFO L93 Difference]: Finished difference Result 3048 states and 4814 transitions. [2019-11-06 19:16:41,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:41,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2019-11-06 19:16:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:41,041 INFO L225 Difference]: With dead ends: 3048 [2019-11-06 19:16:41,041 INFO L226 Difference]: Without dead ends: 2029 [2019-11-06 19:16:41,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2019-11-06 19:16:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1671. [2019-11-06 19:16:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1671 states. [2019-11-06 19:16:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2347 transitions. [2019-11-06 19:16:41,104 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2347 transitions. Word has length 130 [2019-11-06 19:16:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:41,105 INFO L462 AbstractCegarLoop]: Abstraction has 1671 states and 2347 transitions. [2019-11-06 19:16:41,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2347 transitions. [2019-11-06 19:16:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 19:16:41,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:41,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:41,121 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -78025861, now seen corresponding path program 1 times [2019-11-06 19:16:41,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:41,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702799969] [2019-11-06 19:16:41,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:41,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702799969] [2019-11-06 19:16:41,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12907744] [2019-11-06 19:16:41,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:41,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:16:41,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:41,635 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:41,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:16:41,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903683211] [2019-11-06 19:16:41,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:16:41,637 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:16:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:41,638 INFO L87 Difference]: Start difference. First operand 1671 states and 2347 transitions. Second operand 3 states. [2019-11-06 19:16:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:44,413 INFO L93 Difference]: Finished difference Result 4892 states and 6988 transitions. [2019-11-06 19:16:44,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:16:44,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-06 19:16:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:44,433 INFO L225 Difference]: With dead ends: 4892 [2019-11-06 19:16:44,434 INFO L226 Difference]: Without dead ends: 3227 [2019-11-06 19:16:44,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:16:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2019-11-06 19:16:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2918. [2019-11-06 19:16:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2918 states. [2019-11-06 19:16:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 3838 transitions. [2019-11-06 19:16:44,520 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 3838 transitions. Word has length 138 [2019-11-06 19:16:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:44,521 INFO L462 AbstractCegarLoop]: Abstraction has 2918 states and 3838 transitions. [2019-11-06 19:16:44,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:16:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 3838 transitions. [2019-11-06 19:16:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 19:16:44,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:44,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:44,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:44,733 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash 90955185, now seen corresponding path program 1 times [2019-11-06 19:16:44,734 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:44,734 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124178238] [2019-11-06 19:16:44,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:45,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124178238] [2019-11-06 19:16:45,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:45,077 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:16:45,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750010625] [2019-11-06 19:16:45,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:16:45,078 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:45,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:16:45,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:16:45,079 INFO L87 Difference]: Start difference. First operand 2918 states and 3838 transitions. Second operand 9 states. [2019-11-06 19:16:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:51,682 INFO L93 Difference]: Finished difference Result 8710 states and 11711 transitions. [2019-11-06 19:16:51,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:16:51,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 144 [2019-11-06 19:16:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:51,712 INFO L225 Difference]: With dead ends: 8710 [2019-11-06 19:16:51,713 INFO L226 Difference]: Without dead ends: 5798 [2019-11-06 19:16:51,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:16:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2019-11-06 19:16:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5162. [2019-11-06 19:16:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5162 states. [2019-11-06 19:16:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 6378 transitions. [2019-11-06 19:16:51,860 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 6378 transitions. Word has length 144 [2019-11-06 19:16:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:51,861 INFO L462 AbstractCegarLoop]: Abstraction has 5162 states and 6378 transitions. [2019-11-06 19:16:51,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:16:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 6378 transitions. [2019-11-06 19:16:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-06 19:16:51,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:51,865 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:51,865 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1726783468, now seen corresponding path program 1 times [2019-11-06 19:16:51,866 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:51,866 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526173624] [2019-11-06 19:16:51,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:16:52,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526173624] [2019-11-06 19:16:52,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502355823] [2019-11-06 19:16:52,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:52,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:16:52,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:16:52,711 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:52,711 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 19:16:52,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795296431] [2019-11-06 19:16:52,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:16:52,714 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:52,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:16:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:52,715 INFO L87 Difference]: Start difference. First operand 5162 states and 6378 transitions. Second operand 8 states. [2019-11-06 19:16:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:58,969 INFO L93 Difference]: Finished difference Result 15994 states and 20276 transitions. [2019-11-06 19:16:58,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:58,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 258 [2019-11-06 19:16:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:59,021 INFO L225 Difference]: With dead ends: 15994 [2019-11-06 19:16:59,021 INFO L226 Difference]: Without dead ends: 10838 [2019-11-06 19:16:59,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:16:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10838 states. [2019-11-06 19:16:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 9869. [2019-11-06 19:16:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9869 states. [2019-11-06 19:16:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9869 states to 9869 states and 11794 transitions. [2019-11-06 19:16:59,292 INFO L78 Accepts]: Start accepts. Automaton has 9869 states and 11794 transitions. Word has length 258 [2019-11-06 19:16:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:59,295 INFO L462 AbstractCegarLoop]: Abstraction has 9869 states and 11794 transitions. [2019-11-06 19:16:59,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 9869 states and 11794 transitions.