/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/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:14:28,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:14:28,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:14:28,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:14:28,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:14:28,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:14:28,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:14:28,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:14:28,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:14:28,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:14:28,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:14:28,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:14:28,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:14:28,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:14:28,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:14:28,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:14:28,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:14:28,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:14:28,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:14:28,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:14:28,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:14:28,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:14:28,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:14:28,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:14:28,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:14:28,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:14:28,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:14:28,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:14:28,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:14:28,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:14:28,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:14:28,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:14:28,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:14:28,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:14:28,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:14:28,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:14:28,134 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:14:28,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:14:28,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:14:28,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:14:28,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:14:28,157 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:14:28,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:14:28,158 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:14:28,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:14:28,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:14:28,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:14:28,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:14:28,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:14:28,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:14:28,159 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:14:28,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:14:28,159 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:14:28,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:14:28,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:14:28,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:14:28,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:14:28,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:14:28,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:14:28,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:14:28,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:14:28,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:14:28,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:14:28,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:14:28,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:14:28,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:14:28,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:14:28,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:14:28,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:14:28,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:14:28,447 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:14:28,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-06 22:14:28,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40243712/9c6061d003a34d5d9eaaf899c9017f39/FLAG8f8187dd7 [2019-11-06 22:14:29,018 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:14:29,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-06 22:14:29,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40243712/9c6061d003a34d5d9eaaf899c9017f39/FLAG8f8187dd7 [2019-11-06 22:14:29,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40243712/9c6061d003a34d5d9eaaf899c9017f39 [2019-11-06 22:14:29,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:14:29,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:14:29,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:14:29,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:14:29,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:14:29,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:29" (1/1) ... [2019-11-06 22:14:29,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abfb195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:29, skipping insertion in model container [2019-11-06 22:14:29,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:29" (1/1) ... [2019-11-06 22:14:29,432 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:14:29,485 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:14:29,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:14:29,955 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:14:30,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:14:30,048 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:14:30,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30 WrapperNode [2019-11-06 22:14:30,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:14:30,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:14:30,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:14:30,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:14:30,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... [2019-11-06 22:14:30,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:14:30,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:14:30,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:14:30,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:14:30,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:14:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:14:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:14:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:14:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:14:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:14:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:14:30,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:14:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:14:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:14:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:14:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:14:30,189 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:14:30,190 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:14:30,190 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:14:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:14:30,191 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:14:30,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:14:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:14:30,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:14:31,023 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:14:31,023 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:14:31,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:31 BoogieIcfgContainer [2019-11-06 22:14:31,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:14:31,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:14:31,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:14:31,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:14:31,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:14:29" (1/3) ... [2019-11-06 22:14:31,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b2a6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:31, skipping insertion in model container [2019-11-06 22:14:31,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:30" (2/3) ... [2019-11-06 22:14:31,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b2a6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:31, skipping insertion in model container [2019-11-06 22:14:31,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:31" (3/3) ... [2019-11-06 22:14:31,032 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-06 22:14:31,041 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:14:31,049 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:14:31,061 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:14:31,086 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:14:31,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:14:31,087 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:14:31,087 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:14:31,087 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:14:31,087 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:14:31,088 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:14:31,088 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:14:31,110 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2019-11-06 22:14:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:14:31,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:31,120 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] [2019-11-06 22:14:31,122 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:31,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1085569870, now seen corresponding path program 1 times [2019-11-06 22:14:31,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:31,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577037352] [2019-11-06 22:14:31,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:31,836 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:31,880 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577037352] [2019-11-06 22:14:31,881 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:31,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:31,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109065239] [2019-11-06 22:14:31,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:31,891 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:31,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:31,907 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2019-11-06 22:14:32,233 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:33,058 INFO L93 Difference]: Finished difference Result 342 states and 566 transitions. [2019-11-06 22:14:33,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:33,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-11-06 22:14:33,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:33,075 INFO L225 Difference]: With dead ends: 342 [2019-11-06 22:14:33,076 INFO L226 Difference]: Without dead ends: 235 [2019-11-06 22:14:33,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-06 22:14:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2019-11-06 22:14:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-06 22:14:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 363 transitions. [2019-11-06 22:14:33,147 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 363 transitions. Word has length 60 [2019-11-06 22:14:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:33,147 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 363 transitions. [2019-11-06 22:14:33,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 363 transitions. [2019-11-06 22:14:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 22:14:33,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:33,151 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] [2019-11-06 22:14:33,152 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1093309265, now seen corresponding path program 1 times [2019-11-06 22:14:33,152 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:33,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223866627] [2019-11-06 22:14:33,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:33,486 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:33,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223866627] [2019-11-06 22:14:33,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:33,511 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:33,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762834696] [2019-11-06 22:14:33,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:33,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:33,514 INFO L87 Difference]: Start difference. First operand 232 states and 363 transitions. Second operand 4 states. [2019-11-06 22:14:33,724 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:34,386 INFO L93 Difference]: Finished difference Result 570 states and 915 transitions. [2019-11-06 22:14:34,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:34,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2019-11-06 22:14:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:34,390 INFO L225 Difference]: With dead ends: 570 [2019-11-06 22:14:34,390 INFO L226 Difference]: Without dead ends: 393 [2019-11-06 22:14:34,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2019-11-06 22:14:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 389. [2019-11-06 22:14:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-11-06 22:14:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 618 transitions. [2019-11-06 22:14:34,444 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 618 transitions. Word has length 62 [2019-11-06 22:14:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:34,445 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 618 transitions. [2019-11-06 22:14:34,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 618 transitions. [2019-11-06 22:14:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:14:34,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:34,448 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:34,449 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash 647852560, now seen corresponding path program 1 times [2019-11-06 22:14:34,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:34,450 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009226608] [2019-11-06 22:14:34,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:34,708 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:34,739 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009226608] [2019-11-06 22:14:34,740 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:34,740 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:34,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887270580] [2019-11-06 22:14:34,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:34,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:34,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:34,753 INFO L87 Difference]: Start difference. First operand 389 states and 618 transitions. Second operand 4 states. [2019-11-06 22:14:34,988 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:35,590 INFO L93 Difference]: Finished difference Result 1025 states and 1652 transitions. [2019-11-06 22:14:35,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:35,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-11-06 22:14:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:35,597 INFO L225 Difference]: With dead ends: 1025 [2019-11-06 22:14:35,597 INFO L226 Difference]: Without dead ends: 691 [2019-11-06 22:14:35,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-11-06 22:14:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 685. [2019-11-06 22:14:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-11-06 22:14:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1094 transitions. [2019-11-06 22:14:35,639 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1094 transitions. Word has length 64 [2019-11-06 22:14:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:35,640 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1094 transitions. [2019-11-06 22:14:35,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1094 transitions. [2019-11-06 22:14:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 22:14:35,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:35,643 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] [2019-11-06 22:14:35,644 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash -971934415, now seen corresponding path program 1 times [2019-11-06 22:14:35,644 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:35,645 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418469932] [2019-11-06 22:14:35,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:35,940 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:35,963 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418469932] [2019-11-06 22:14:35,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:35,963 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:35,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017007592] [2019-11-06 22:14:35,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:14:35,964 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:35,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:14:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:35,965 INFO L87 Difference]: Start difference. First operand 685 states and 1094 transitions. Second operand 6 states. [2019-11-06 22:14:36,212 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:36,954 INFO L93 Difference]: Finished difference Result 2313 states and 3756 transitions. [2019-11-06 22:14:36,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:36,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2019-11-06 22:14:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:36,965 INFO L225 Difference]: With dead ends: 2313 [2019-11-06 22:14:36,965 INFO L226 Difference]: Without dead ends: 1683 [2019-11-06 22:14:36,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:14:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2019-11-06 22:14:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1500. [2019-11-06 22:14:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2019-11-06 22:14:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2423 transitions. [2019-11-06 22:14:37,041 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2423 transitions. Word has length 66 [2019-11-06 22:14:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:37,042 INFO L462 AbstractCegarLoop]: Abstraction has 1500 states and 2423 transitions. [2019-11-06 22:14:37,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:14:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2423 transitions. [2019-11-06 22:14:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 22:14:37,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:37,046 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] [2019-11-06 22:14:37,046 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:37,046 INFO L82 PathProgramCache]: Analyzing trace with hash -126806256, now seen corresponding path program 1 times [2019-11-06 22:14:37,047 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:37,047 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350249588] [2019-11-06 22:14:37,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:37,399 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:37,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350249588] [2019-11-06 22:14:37,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:37,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:14:37,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555122582] [2019-11-06 22:14:37,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:14:37,426 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:37,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:14:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:14:37,427 INFO L87 Difference]: Start difference. First operand 1500 states and 2423 transitions. Second operand 7 states. [2019-11-06 22:14:37,682 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-06 22:14:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:38,849 INFO L93 Difference]: Finished difference Result 5957 states and 9657 transitions. [2019-11-06 22:14:38,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:14:38,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-06 22:14:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:38,885 INFO L225 Difference]: With dead ends: 5957 [2019-11-06 22:14:38,885 INFO L226 Difference]: Without dead ends: 4512 [2019-11-06 22:14:38,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:14:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2019-11-06 22:14:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4409. [2019-11-06 22:14:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4409 states. [2019-11-06 22:14:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 7126 transitions. [2019-11-06 22:14:39,165 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 7126 transitions. Word has length 67 [2019-11-06 22:14:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:39,166 INFO L462 AbstractCegarLoop]: Abstraction has 4409 states and 7126 transitions. [2019-11-06 22:14:39,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:14:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 7126 transitions. [2019-11-06 22:14:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 22:14:39,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:39,168 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] [2019-11-06 22:14:39,168 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash 306920920, now seen corresponding path program 1 times [2019-11-06 22:14:39,169 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:39,170 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195677413] [2019-11-06 22:14:39,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:39,496 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:39,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195677413] [2019-11-06 22:14:39,514 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:39,515 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:14:39,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170700249] [2019-11-06 22:14:39,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:14:39,516 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:39,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:14:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:39,516 INFO L87 Difference]: Start difference. First operand 4409 states and 7126 transitions. Second operand 5 states. [2019-11-06 22:14:39,723 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:14:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:40,540 INFO L93 Difference]: Finished difference Result 10298 states and 16697 transitions. [2019-11-06 22:14:40,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:14:40,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-11-06 22:14:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:40,578 INFO L225 Difference]: With dead ends: 10298 [2019-11-06 22:14:40,578 INFO L226 Difference]: Without dead ends: 6343 [2019-11-06 22:14:40,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2019-11-06 22:14:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 6316. [2019-11-06 22:14:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6316 states. [2019-11-06 22:14:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 10205 transitions. [2019-11-06 22:14:40,904 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 10205 transitions. Word has length 68 [2019-11-06 22:14:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:40,905 INFO L462 AbstractCegarLoop]: Abstraction has 6316 states and 10205 transitions. [2019-11-06 22:14:40,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:14:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 10205 transitions. [2019-11-06 22:14:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 22:14:40,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:40,908 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:40,909 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash 872119511, now seen corresponding path program 1 times [2019-11-06 22:14:40,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:40,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901888745] [2019-11-06 22:14:40,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:41,208 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:41,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901888745] [2019-11-06 22:14:41,229 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:41,229 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:14:41,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732110246] [2019-11-06 22:14:41,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:14:41,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:41,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:14:41,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:41,231 INFO L87 Difference]: Start difference. First operand 6316 states and 10205 transitions. Second operand 5 states. [2019-11-06 22:14:41,460 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:14:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:42,458 INFO L93 Difference]: Finished difference Result 18451 states and 29920 transitions. [2019-11-06 22:14:42,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:14:42,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-11-06 22:14:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:42,537 INFO L225 Difference]: With dead ends: 18451 [2019-11-06 22:14:42,537 INFO L226 Difference]: Without dead ends: 12686 [2019-11-06 22:14:42,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2019-11-06 22:14:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 8636. [2019-11-06 22:14:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8636 states. [2019-11-06 22:14:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 13951 transitions. [2019-11-06 22:14:43,021 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 13951 transitions. Word has length 69 [2019-11-06 22:14:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:43,021 INFO L462 AbstractCegarLoop]: Abstraction has 8636 states and 13951 transitions. [2019-11-06 22:14:43,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:14:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 13951 transitions. [2019-11-06 22:14:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 22:14:43,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:43,024 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] [2019-11-06 22:14:43,024 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1806428220, now seen corresponding path program 1 times [2019-11-06 22:14:43,025 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:43,025 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593002399] [2019-11-06 22:14:43,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:43,251 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:43,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593002399] [2019-11-06 22:14:43,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:43,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:43,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506607347] [2019-11-06 22:14:43,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:43,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:43,272 INFO L87 Difference]: Start difference. First operand 8636 states and 13951 transitions. Second operand 4 states. [2019-11-06 22:14:43,488 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:44,439 INFO L93 Difference]: Finished difference Result 19227 states and 31095 transitions. [2019-11-06 22:14:44,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:44,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-06 22:14:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:44,469 INFO L225 Difference]: With dead ends: 19227 [2019-11-06 22:14:44,469 INFO L226 Difference]: Without dead ends: 12825 [2019-11-06 22:14:44,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12825 states. [2019-11-06 22:14:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12825 to 12823. [2019-11-06 22:14:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12823 states. [2019-11-06 22:14:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12823 states to 12823 states and 20604 transitions. [2019-11-06 22:14:45,019 INFO L78 Accepts]: Start accepts. Automaton has 12823 states and 20604 transitions. Word has length 70 [2019-11-06 22:14:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:45,019 INFO L462 AbstractCegarLoop]: Abstraction has 12823 states and 20604 transitions. [2019-11-06 22:14:45,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12823 states and 20604 transitions. [2019-11-06 22:14:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 22:14:45,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:45,021 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] [2019-11-06 22:14:45,022 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash -552777714, now seen corresponding path program 1 times [2019-11-06 22:14:45,022 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:45,022 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880210298] [2019-11-06 22:14:45,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:45,247 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:45,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880210298] [2019-11-06 22:14:45,262 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:45,263 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:45,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811487108] [2019-11-06 22:14:45,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:45,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:45,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:45,264 INFO L87 Difference]: Start difference. First operand 12823 states and 20604 transitions. Second operand 4 states. [2019-11-06 22:14:45,464 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:46,560 INFO L93 Difference]: Finished difference Result 27737 states and 44670 transitions. [2019-11-06 22:14:46,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:46,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-06 22:14:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:46,612 INFO L225 Difference]: With dead ends: 27737 [2019-11-06 22:14:46,612 INFO L226 Difference]: Without dead ends: 18500 [2019-11-06 22:14:46,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18500 states. [2019-11-06 22:14:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18500 to 18498. [2019-11-06 22:14:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18498 states. [2019-11-06 22:14:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 29596 transitions. [2019-11-06 22:14:47,301 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 29596 transitions. Word has length 70 [2019-11-06 22:14:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:47,301 INFO L462 AbstractCegarLoop]: Abstraction has 18498 states and 29596 transitions. [2019-11-06 22:14:47,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 29596 transitions. [2019-11-06 22:14:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 22:14:47,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:47,303 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] [2019-11-06 22:14:47,303 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1170468960, now seen corresponding path program 1 times [2019-11-06 22:14:47,304 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:47,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400095955] [2019-11-06 22:14:47,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:47,545 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:47,566 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400095955] [2019-11-06 22:14:47,566 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:47,566 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:47,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456256279] [2019-11-06 22:14:47,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:47,567 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:47,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:47,567 INFO L87 Difference]: Start difference. First operand 18498 states and 29596 transitions. Second operand 4 states. [2019-11-06 22:14:47,782 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:14:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:49,915 INFO L93 Difference]: Finished difference Result 42427 states and 68162 transitions. [2019-11-06 22:14:49,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:49,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-06 22:14:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:49,969 INFO L225 Difference]: With dead ends: 42427 [2019-11-06 22:14:49,970 INFO L226 Difference]: Without dead ends: 27744 [2019-11-06 22:14:50,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2019-11-06 22:14:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 27742. [2019-11-06 22:14:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27742 states. [2019-11-06 22:14:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27742 states to 27742 states and 44151 transitions. [2019-11-06 22:14:50,842 INFO L78 Accepts]: Start accepts. Automaton has 27742 states and 44151 transitions. Word has length 70 [2019-11-06 22:14:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:50,842 INFO L462 AbstractCegarLoop]: Abstraction has 27742 states and 44151 transitions. [2019-11-06 22:14:50,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 27742 states and 44151 transitions. [2019-11-06 22:14:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 22:14:50,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:50,843 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] [2019-11-06 22:14:50,843 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:50,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:50,843 INFO L82 PathProgramCache]: Analyzing trace with hash -901408249, now seen corresponding path program 1 times [2019-11-06 22:14:50,843 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:50,843 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128403074] [2019-11-06 22:14:50,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:51,117 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:51,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128403074] [2019-11-06 22:14:51,140 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:51,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:51,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353430407] [2019-11-06 22:14:51,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:14:51,141 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:14:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:51,142 INFO L87 Difference]: Start difference. First operand 27742 states and 44151 transitions. Second operand 6 states. [2019-11-06 22:14:51,479 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-11-06 22:14:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:52,883 INFO L93 Difference]: Finished difference Result 57487 states and 91562 transitions. [2019-11-06 22:14:52,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:52,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2019-11-06 22:14:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:52,930 INFO L225 Difference]: With dead ends: 57487 [2019-11-06 22:14:52,930 INFO L226 Difference]: Without dead ends: 29834 [2019-11-06 22:14:52,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:14:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29834 states. [2019-11-06 22:14:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29834 to 27742. [2019-11-06 22:14:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27742 states. [2019-11-06 22:14:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27742 states to 27742 states and 44016 transitions. [2019-11-06 22:14:53,982 INFO L78 Accepts]: Start accepts. Automaton has 27742 states and 44016 transitions. Word has length 71 [2019-11-06 22:14:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:53,983 INFO L462 AbstractCegarLoop]: Abstraction has 27742 states and 44016 transitions. [2019-11-06 22:14:53,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:14:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27742 states and 44016 transitions. [2019-11-06 22:14:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 22:14:53,983 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:53,984 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] [2019-11-06 22:14:53,984 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:53,984 INFO L82 PathProgramCache]: Analyzing trace with hash 527849417, now seen corresponding path program 1 times [2019-11-06 22:14:53,985 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:53,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818198136] [2019-11-06 22:14:53,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:54,312 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:54,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818198136] [2019-11-06 22:14:54,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:54,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:54,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911691343] [2019-11-06 22:14:54,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:14:54,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:14:54,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:54,336 INFO L87 Difference]: Start difference. First operand 27742 states and 44016 transitions. Second operand 6 states. [2019-11-06 22:14:54,558 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-11-06 22:14:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:57,590 INFO L93 Difference]: Finished difference Result 89911 states and 143015 transitions. [2019-11-06 22:14:57,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:57,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2019-11-06 22:14:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:57,685 INFO L225 Difference]: With dead ends: 89911 [2019-11-06 22:14:57,686 INFO L226 Difference]: Without dead ends: 62258 [2019-11-06 22:14:57,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:14:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62258 states. [2019-11-06 22:14:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62258 to 38998. [2019-11-06 22:14:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38998 states. [2019-11-06 22:14:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38998 states to 38998 states and 61670 transitions. [2019-11-06 22:14:59,171 INFO L78 Accepts]: Start accepts. Automaton has 38998 states and 61670 transitions. Word has length 74 [2019-11-06 22:14:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:59,171 INFO L462 AbstractCegarLoop]: Abstraction has 38998 states and 61670 transitions. [2019-11-06 22:14:59,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:14:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 38998 states and 61670 transitions. [2019-11-06 22:14:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-06 22:14:59,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:59,172 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] [2019-11-06 22:14:59,172 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:59,172 INFO L82 PathProgramCache]: Analyzing trace with hash -818446556, now seen corresponding path program 1 times [2019-11-06 22:14:59,172 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:59,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467343682] [2019-11-06 22:14:59,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:59,469 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-11-06 22:14:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:59,490 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467343682] [2019-11-06 22:14:59,491 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:59,491 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:59,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260511176] [2019-11-06 22:14:59,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:14:59,492 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:59,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:14:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:59,493 INFO L87 Difference]: Start difference. First operand 38998 states and 61670 transitions. Second operand 6 states. [2019-11-06 22:15:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:02,503 INFO L93 Difference]: Finished difference Result 68965 states and 108517 transitions. [2019-11-06 22:15:02,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:15:02,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2019-11-06 22:15:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:02,617 INFO L225 Difference]: With dead ends: 68965 [2019-11-06 22:15:02,617 INFO L226 Difference]: Without dead ends: 68963 [2019-11-06 22:15:02,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:15:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68963 states.