/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/Problem03_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:01:22,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:01:22,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:01:22,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:01:22,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:01:22,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:01:22,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:01:22,112 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 19:01:22,145 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:01:22,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:01:22,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:01:22,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:01:22,150 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:01:22,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:01:22,151 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:01:22,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:01:22,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:01:22,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:01:22,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:01:22,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:01:22,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:01:22,152 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:01:22,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:01:22,153 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:01:22,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:01:22,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:01:22,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:01:22,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:01:22,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:01:22,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:01:22,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:01:22,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:01:22,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:01:22,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:01:22,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:01:22,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:01:22,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:01:22,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:01:22,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:01:22,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:01:22,466 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:01:22,466 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:01:22,467 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-11-06 19:01:22,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/232f7138f/f2f9a1c23a0a45bb978d7c72a5206405/FLAGbe84a95ca [2019-11-06 19:01:23,154 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:01:23,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-11-06 19:01:23,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/232f7138f/f2f9a1c23a0a45bb978d7c72a5206405/FLAGbe84a95ca [2019-11-06 19:01:23,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/232f7138f/f2f9a1c23a0a45bb978d7c72a5206405 [2019-11-06 19:01:23,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:01:23,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:01:23,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:23,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:01:23,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:01:23,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:23" (1/1) ... [2019-11-06 19:01:23,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da2c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:23, skipping insertion in model container [2019-11-06 19:01:23,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:23" (1/1) ... [2019-11-06 19:01:23,370 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:01:23,453 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:01:24,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:24,317 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:01:24,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:24,565 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:01:24,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24 WrapperNode [2019-11-06 19:01:24,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:24,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:01:24,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:01:24,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:01:24,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (1/1) ... [2019-11-06 19:01:24,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:01:24,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:01:24,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:01:24,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:01:24,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (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 19:01:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:01:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:01:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:01:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:01:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:01:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:01:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:01:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:01:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:01:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:01:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:01:26,874 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:01:26,875 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:01:26,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:26 BoogieIcfgContainer [2019-11-06 19:01:26,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:01:26,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:01:26,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:01:26,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:01:26,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:01:23" (1/3) ... [2019-11-06 19:01:26,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3757656a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:26, skipping insertion in model container [2019-11-06 19:01:26,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:24" (2/3) ... [2019-11-06 19:01:26,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3757656a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:26, skipping insertion in model container [2019-11-06 19:01:26,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:26" (3/3) ... [2019-11-06 19:01:26,893 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label43.c [2019-11-06 19:01:26,903 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:01:26,913 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:01:26,925 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:01:26,963 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:01:26,963 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:01:26,965 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:01:26,965 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:01:26,965 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:01:26,965 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:01:26,965 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:01:26,966 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:01:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:01:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 19:01:27,007 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:27,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:27,011 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1933795261, now seen corresponding path program 1 times [2019-11-06 19:01:27,027 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:27,028 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762638756] [2019-11-06 19:01:27,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,880 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:28,069 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 19:01:28,070 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762638756] [2019-11-06 19:01:28,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:28,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:01:28,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927722932] [2019-11-06 19:01:28,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:28,080 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:28,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:28,099 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:01:28,300 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:28,790 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-11-06 19:01:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:32,127 INFO L93 Difference]: Finished difference Result 1074 states and 1940 transitions. [2019-11-06 19:01:32,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:32,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-06 19:01:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:32,164 INFO L225 Difference]: With dead ends: 1074 [2019-11-06 19:01:32,167 INFO L226 Difference]: Without dead ends: 695 [2019-11-06 19:01:32,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-11-06 19:01:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 469. [2019-11-06 19:01:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-11-06 19:01:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 754 transitions. [2019-11-06 19:01:32,315 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 754 transitions. Word has length 156 [2019-11-06 19:01:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:32,316 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 754 transitions. [2019-11-06 19:01:32,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 754 transitions. [2019-11-06 19:01:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-06 19:01:32,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:32,323 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:32,323 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2055560806, now seen corresponding path program 1 times [2019-11-06 19:01:32,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:32,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836492742] [2019-11-06 19:01:32,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:32,631 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:32,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836492742] [2019-11-06 19:01:32,857 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:32,858 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:01:32,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180575842] [2019-11-06 19:01:32,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:01:32,860 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:01:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:32,861 INFO L87 Difference]: Start difference. First operand 469 states and 754 transitions. Second operand 8 states. [2019-11-06 19:01:33,021 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:35,921 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-11-06 19:01:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:36,508 INFO L93 Difference]: Finished difference Result 1416 states and 2364 transitions. [2019-11-06 19:01:36,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:01:36,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2019-11-06 19:01:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:36,523 INFO L225 Difference]: With dead ends: 1416 [2019-11-06 19:01:36,524 INFO L226 Difference]: Without dead ends: 953 [2019-11-06 19:01:36,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:01:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-11-06 19:01:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 908. [2019-11-06 19:01:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-11-06 19:01:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1450 transitions. [2019-11-06 19:01:36,630 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1450 transitions. Word has length 165 [2019-11-06 19:01:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:36,632 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1450 transitions. [2019-11-06 19:01:36,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:01:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1450 transitions. [2019-11-06 19:01:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 19:01:36,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:36,651 INFO L410 BasicCegarLoop]: trace histogram [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 19:01:36,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1409737428, now seen corresponding path program 1 times [2019-11-06 19:01:36,653 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:36,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536795202] [2019-11-06 19:01:36,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:36,876 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:37,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536795202] [2019-11-06 19:01:37,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:37,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:01:37,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697187849] [2019-11-06 19:01:37,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:01:37,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:37,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:01:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:37,103 INFO L87 Difference]: Start difference. First operand 908 states and 1450 transitions. Second operand 8 states. [2019-11-06 19:01:37,257 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:37,608 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:38,038 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:41,964 INFO L93 Difference]: Finished difference Result 3573 states and 5961 transitions. [2019-11-06 19:01:41,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:01:41,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2019-11-06 19:01:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:41,986 INFO L225 Difference]: With dead ends: 3573 [2019-11-06 19:01:41,986 INFO L226 Difference]: Without dead ends: 2671 [2019-11-06 19:01:41,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:01:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2019-11-06 19:01:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2636. [2019-11-06 19:01:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-11-06 19:01:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4004 transitions. [2019-11-06 19:01:42,104 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4004 transitions. Word has length 166 [2019-11-06 19:01:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:42,105 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 4004 transitions. [2019-11-06 19:01:42,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:01:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4004 transitions. [2019-11-06 19:01:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 19:01:42,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:42,115 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:01:42,115 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:42,116 INFO L82 PathProgramCache]: Analyzing trace with hash 986588969, now seen corresponding path program 1 times [2019-11-06 19:01:42,116 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:42,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742175519] [2019-11-06 19:01:42,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:42,443 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:42,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742175519] [2019-11-06 19:01:42,638 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374135826] [2019-11-06 19:01:42,638 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 19:01:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:42,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:42,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:43,193 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:43,193 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:01:43,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614784202] [2019-11-06 19:01:43,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:43,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:43,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:43,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:43,195 INFO L87 Difference]: Start difference. First operand 2636 states and 4004 transitions. Second operand 3 states. [2019-11-06 19:01:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:44,389 INFO L93 Difference]: Finished difference Result 7809 states and 12194 transitions. [2019-11-06 19:01:44,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:44,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2019-11-06 19:01:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:44,421 INFO L225 Difference]: With dead ends: 7809 [2019-11-06 19:01:44,421 INFO L226 Difference]: Without dead ends: 5179 [2019-11-06 19:01:44,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:01:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2019-11-06 19:01:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5176. [2019-11-06 19:01:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5176 states. [2019-11-06 19:01:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7198 transitions. [2019-11-06 19:01:44,617 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7198 transitions. Word has length 168 [2019-11-06 19:01:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:44,618 INFO L462 AbstractCegarLoop]: Abstraction has 5176 states and 7198 transitions. [2019-11-06 19:01:44,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7198 transitions. [2019-11-06 19:01:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 19:01:44,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:44,634 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:01:44,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:44,843 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash 561992701, now seen corresponding path program 1 times [2019-11-06 19:01:44,844 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:44,845 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259134084] [2019-11-06 19:01:44,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:45,169 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:45,329 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:01:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:45,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259134084] [2019-11-06 19:01:45,484 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:45,484 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:45,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687990300] [2019-11-06 19:01:45,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:45,485 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:45,485 INFO L87 Difference]: Start difference. First operand 5176 states and 7198 transitions. Second operand 9 states. [2019-11-06 19:01:45,704 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:49,144 INFO L93 Difference]: Finished difference Result 15757 states and 24234 transitions. [2019-11-06 19:01:49,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:01:49,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-11-06 19:01:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:49,241 INFO L225 Difference]: With dead ends: 15757 [2019-11-06 19:01:49,241 INFO L226 Difference]: Without dead ends: 10587 [2019-11-06 19:01:49,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:01:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2019-11-06 19:01:49,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 10365. [2019-11-06 19:01:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10365 states. [2019-11-06 19:01:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 14905 transitions. [2019-11-06 19:01:49,747 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 14905 transitions. Word has length 174 [2019-11-06 19:01:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:49,747 INFO L462 AbstractCegarLoop]: Abstraction has 10365 states and 14905 transitions. [2019-11-06 19:01:49,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 14905 transitions. [2019-11-06 19:01:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 19:01:49,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:49,785 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:01:49,785 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 642664422, now seen corresponding path program 1 times [2019-11-06 19:01:49,786 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:49,786 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055030514] [2019-11-06 19:01:49,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,001 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:50,244 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055030514] [2019-11-06 19:01:50,245 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:50,245 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:50,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770685649] [2019-11-06 19:01:50,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:50,246 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:50,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:50,247 INFO L87 Difference]: Start difference. First operand 10365 states and 14905 transitions. Second operand 9 states. [2019-11-06 19:01:50,400 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:51,052 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:51,417 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:55,199 INFO L93 Difference]: Finished difference Result 39827 states and 61400 transitions. [2019-11-06 19:01:55,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:01:55,200 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-11-06 19:01:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:55,354 INFO L225 Difference]: With dead ends: 39827 [2019-11-06 19:01:55,354 INFO L226 Difference]: Without dead ends: 29468 [2019-11-06 19:01:55,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:01:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29468 states. [2019-11-06 19:01:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29468 to 29254. [2019-11-06 19:01:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29254 states. [2019-11-06 19:01:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29254 states to 29254 states and 40630 transitions. [2019-11-06 19:01:56,569 INFO L78 Accepts]: Start accepts. Automaton has 29254 states and 40630 transitions. Word has length 175 [2019-11-06 19:01:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:56,570 INFO L462 AbstractCegarLoop]: Abstraction has 29254 states and 40630 transitions. [2019-11-06 19:01:56,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29254 states and 40630 transitions. [2019-11-06 19:01:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-06 19:01:56,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:56,627 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:01:56,627 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash 556052541, now seen corresponding path program 1 times [2019-11-06 19:01:56,628 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:56,628 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336265019] [2019-11-06 19:01:56,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat