/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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:14:36,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:14:36,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:14:36,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:14:36,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:14:36,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:14:36,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:14:36,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:14:36,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:14:36,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:14:36,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:14:36,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:14:36,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:14:36,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:14:36,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:14:36,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:14:36,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:14:36,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:14:36,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:14:36,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:14:36,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:14:36,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:14:36,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:14:36,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:14:36,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:14:36,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:14:36,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:14:36,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:14:36,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:14:36,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:14:36,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:14:36,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:14:36,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:14:36,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:14:36,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:14:36,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:14:36,106 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 22:14:36,140 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:14:36,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:14:36,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:14:36,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:14:36,143 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:14:36,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:14:36,144 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:14:36,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:14:36,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:14:36,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:14:36,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:14:36,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:14:36,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:14:36,145 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:14:36,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:14:36,145 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:14:36,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:14:36,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:14:36,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:14:36,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:14:36,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:14:36,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:14:36,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:14:36,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:14:36,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:14:36,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:14:36,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:14:36,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:14:36,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:14:36,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:14:36,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:14:36,436 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:14:36,437 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:14:36,438 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:14:36,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:14:36,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd85d798/97c321eec69e48579009b43d34ea3ec9/FLAG261b08a5f [2019-11-06 22:14:37,060 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:14:37,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:14:37,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd85d798/97c321eec69e48579009b43d34ea3ec9/FLAG261b08a5f [2019-11-06 22:14:37,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd85d798/97c321eec69e48579009b43d34ea3ec9 [2019-11-06 22:14:37,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:14:37,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:14:37,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:14:37,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:14:37,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:14:37,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:37" (1/1) ... [2019-11-06 22:14:37,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b288fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:37, skipping insertion in model container [2019-11-06 22:14:37,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:14:37" (1/1) ... [2019-11-06 22:14:37,355 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:14:37,422 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:14:37,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:14:38,004 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:14:38,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:14:38,409 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:14:38,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38 WrapperNode [2019-11-06 22:14:38,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:14:38,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:14:38,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:14:38,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:14:38,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (1/1) ... [2019-11-06 22:14:38,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:14:38,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:14:38,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:14:38,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:14:38,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (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 22:14:38,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:14:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:14:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:14:38,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:14:38,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:14:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:14:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:14:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:14:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:14:38,609 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:14:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:14:38,610 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:14:38,611 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:14:38,611 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:14:38,612 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:14:38,612 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:14:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:14:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:14:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:14:40,054 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:14:40,055 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:14:40,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:40 BoogieIcfgContainer [2019-11-06 22:14:40,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:14:40,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:14:40,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:14:40,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:14:40,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:14:37" (1/3) ... [2019-11-06 22:14:40,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b498b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:40, skipping insertion in model container [2019-11-06 22:14:40,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:14:38" (2/3) ... [2019-11-06 22:14:40,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b498b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:14:40, skipping insertion in model container [2019-11-06 22:14:40,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:14:40" (3/3) ... [2019-11-06 22:14:40,069 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:14:40,079 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:14:40,106 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:14:40,122 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:14:40,164 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:14:40,165 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:14:40,165 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:14:40,165 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:14:40,165 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:14:40,165 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:14:40,165 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:14:40,166 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:14:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states. [2019-11-06 22:14:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:14:40,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:40,229 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] [2019-11-06 22:14:40,230 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2145773874, now seen corresponding path program 1 times [2019-11-06 22:14:40,243 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:40,243 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517090320] [2019-11-06 22:14:40,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:41,178 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:41,274 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 22:14:41,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517090320] [2019-11-06 22:14:41,275 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:41,276 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:41,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425165814] [2019-11-06 22:14:41,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:41,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:41,303 INFO L87 Difference]: Start difference. First operand 343 states. Second operand 4 states. [2019-11-06 22:14:41,646 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2019-11-06 22:14:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:43,580 INFO L93 Difference]: Finished difference Result 667 states and 1149 transitions. [2019-11-06 22:14:43,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:43,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-06 22:14:43,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:43,602 INFO L225 Difference]: With dead ends: 667 [2019-11-06 22:14:43,602 INFO L226 Difference]: Without dead ends: 547 [2019-11-06 22:14:43,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2019-11-06 22:14:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2019-11-06 22:14:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-11-06 22:14:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 816 transitions. [2019-11-06 22:14:43,711 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 816 transitions. Word has length 153 [2019-11-06 22:14:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:43,712 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 816 transitions. [2019-11-06 22:14:43,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 816 transitions. [2019-11-06 22:14:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:14:43,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:43,718 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] [2019-11-06 22:14:43,718 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1947920687, now seen corresponding path program 1 times [2019-11-06 22:14:43,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:43,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870654583] [2019-11-06 22:14:43,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:44,451 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:44,507 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 22:14:44,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870654583] [2019-11-06 22:14:44,508 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:44,508 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:14:44,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220574603] [2019-11-06 22:14:44,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:14:44,512 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:14:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:44,513 INFO L87 Difference]: Start difference. First operand 545 states and 816 transitions. Second operand 5 states. [2019-11-06 22:14:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:46,995 INFO L93 Difference]: Finished difference Result 1582 states and 2365 transitions. [2019-11-06 22:14:46,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:46,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-06 22:14:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:47,004 INFO L225 Difference]: With dead ends: 1582 [2019-11-06 22:14:47,004 INFO L226 Difference]: Without dead ends: 1050 [2019-11-06 22:14:47,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2019-11-06 22:14:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1048. [2019-11-06 22:14:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2019-11-06 22:14:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1555 transitions. [2019-11-06 22:14:47,083 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1555 transitions. Word has length 153 [2019-11-06 22:14:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:47,084 INFO L462 AbstractCegarLoop]: Abstraction has 1048 states and 1555 transitions. [2019-11-06 22:14:47,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:14:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1555 transitions. [2019-11-06 22:14:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:14:47,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:47,095 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] [2019-11-06 22:14:47,096 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash -977754725, now seen corresponding path program 1 times [2019-11-06 22:14:47,097 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:47,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118692143] [2019-11-06 22:14:47,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:47,418 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:47,476 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 22:14:47,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118692143] [2019-11-06 22:14:47,477 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:47,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:47,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215715916] [2019-11-06 22:14:47,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:47,482 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:47,489 INFO L87 Difference]: Start difference. First operand 1048 states and 1555 transitions. Second operand 4 states. [2019-11-06 22:14:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:49,731 INFO L93 Difference]: Finished difference Result 3098 states and 4595 transitions. [2019-11-06 22:14:49,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:14:49,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-06 22:14:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:49,743 INFO L225 Difference]: With dead ends: 3098 [2019-11-06 22:14:49,743 INFO L226 Difference]: Without dead ends: 2082 [2019-11-06 22:14:49,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2019-11-06 22:14:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1050. [2019-11-06 22:14:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1050 states. [2019-11-06 22:14:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1557 transitions. [2019-11-06 22:14:49,811 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1557 transitions. Word has length 154 [2019-11-06 22:14:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:49,811 INFO L462 AbstractCegarLoop]: Abstraction has 1050 states and 1557 transitions. [2019-11-06 22:14:49,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1557 transitions. [2019-11-06 22:14:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-06 22:14:49,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:49,815 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] [2019-11-06 22:14:49,815 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:49,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1993769360, now seen corresponding path program 1 times [2019-11-06 22:14:49,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:49,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365128839] [2019-11-06 22:14:49,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:50,289 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:50,357 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 22:14:50,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365128839] [2019-11-06 22:14:50,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:50,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:14:50,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588331149] [2019-11-06 22:14:50,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:14:50,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:14:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:50,360 INFO L87 Difference]: Start difference. First operand 1050 states and 1557 transitions. Second operand 5 states. [2019-11-06 22:14:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:52,909 INFO L93 Difference]: Finished difference Result 3028 states and 4475 transitions. [2019-11-06 22:14:52,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:52,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2019-11-06 22:14:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:52,920 INFO L225 Difference]: With dead ends: 3028 [2019-11-06 22:14:52,921 INFO L226 Difference]: Without dead ends: 2012 [2019-11-06 22:14:52,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2019-11-06 22:14:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 2010. [2019-11-06 22:14:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2019-11-06 22:14:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 2946 transitions. [2019-11-06 22:14:53,009 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 2946 transitions. Word has length 155 [2019-11-06 22:14:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:53,010 INFO L462 AbstractCegarLoop]: Abstraction has 2010 states and 2946 transitions. [2019-11-06 22:14:53,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:14:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 2946 transitions. [2019-11-06 22:14:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:14:53,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:53,015 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 22:14:53,015 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:53,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1911081562, now seen corresponding path program 1 times [2019-11-06 22:14:53,016 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:53,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588522088] [2019-11-06 22:14:53,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:53,326 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:53,386 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 22:14:53,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588522088] [2019-11-06 22:14:53,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:53,387 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:53,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447607826] [2019-11-06 22:14:53,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:53,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:53,389 INFO L87 Difference]: Start difference. First operand 2010 states and 2946 transitions. Second operand 4 states. [2019-11-06 22:14:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:56,135 INFO L93 Difference]: Finished difference Result 5946 states and 8710 transitions. [2019-11-06 22:14:56,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:14:56,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-11-06 22:14:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:56,154 INFO L225 Difference]: With dead ends: 5946 [2019-11-06 22:14:56,154 INFO L226 Difference]: Without dead ends: 3984 [2019-11-06 22:14:56,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2019-11-06 22:14:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 2014. [2019-11-06 22:14:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2014 states. [2019-11-06 22:14:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 2950 transitions. [2019-11-06 22:14:56,263 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 2950 transitions. Word has length 156 [2019-11-06 22:14:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:56,263 INFO L462 AbstractCegarLoop]: Abstraction has 2014 states and 2950 transitions. [2019-11-06 22:14:56,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 2950 transitions. [2019-11-06 22:14:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:14:56,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:56,267 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, 1] [2019-11-06 22:14:56,268 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1119552745, now seen corresponding path program 1 times [2019-11-06 22:14:56,268 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:56,269 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014149394] [2019-11-06 22:14:56,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:56,540 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:56,584 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 22:14:56,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014149394] [2019-11-06 22:14:56,586 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:56,586 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:56,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775220340] [2019-11-06 22:14:56,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:56,587 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:56,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:56,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:56,588 INFO L87 Difference]: Start difference. First operand 2014 states and 2950 transitions. Second operand 4 states. [2019-11-06 22:14:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:59,162 INFO L93 Difference]: Finished difference Result 5574 states and 8182 transitions. [2019-11-06 22:14:59,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:14:59,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-11-06 22:14:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:59,220 INFO L225 Difference]: With dead ends: 5574 [2019-11-06 22:14:59,220 INFO L226 Difference]: Without dead ends: 3872 [2019-11-06 22:14:59,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2019-11-06 22:14:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 3870. [2019-11-06 22:14:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3870 states. [2019-11-06 22:14:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5608 transitions. [2019-11-06 22:14:59,410 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5608 transitions. Word has length 157 [2019-11-06 22:14:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:59,410 INFO L462 AbstractCegarLoop]: Abstraction has 3870 states and 5608 transitions. [2019-11-06 22:14:59,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5608 transitions. [2019-11-06 22:14:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:14:59,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:59,417 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, 1] [2019-11-06 22:14:59,417 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1667762650, now seen corresponding path program 1 times [2019-11-06 22:14:59,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:59,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469958177] [2019-11-06 22:14:59,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:59,837 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:14:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:59,875 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 22:14:59,875 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469958177] [2019-11-06 22:14:59,876 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:59,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:14:59,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411912765] [2019-11-06 22:14:59,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:14:59,877 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:59,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:14:59,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:59,877 INFO L87 Difference]: Start difference. First operand 3870 states and 5608 transitions. Second operand 5 states. [2019-11-06 22:15:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:01,529 INFO L93 Difference]: Finished difference Result 8114 states and 11658 transitions. [2019-11-06 22:15:01,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:01,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-06 22:15:01,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:01,549 INFO L225 Difference]: With dead ends: 8114 [2019-11-06 22:15:01,549 INFO L226 Difference]: Without dead ends: 4104 [2019-11-06 22:15:01,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:15:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2019-11-06 22:15:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 4102. [2019-11-06 22:15:01,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4102 states. [2019-11-06 22:15:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4102 states to 4102 states and 5846 transitions. [2019-11-06 22:15:01,796 INFO L78 Accepts]: Start accepts. Automaton has 4102 states and 5846 transitions. Word has length 157 [2019-11-06 22:15:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:01,797 INFO L462 AbstractCegarLoop]: Abstraction has 4102 states and 5846 transitions. [2019-11-06 22:15:01,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:15:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4102 states and 5846 transitions. [2019-11-06 22:15:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:15:01,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:01,811 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, 1] [2019-11-06 22:15:01,812 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1655861647, now seen corresponding path program 1 times [2019-11-06 22:15:01,813 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:01,813 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475687875] [2019-11-06 22:15:01,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:02,233 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:15:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:02,331 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 22:15:02,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475687875] [2019-11-06 22:15:02,331 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:02,331 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:15:02,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265899416] [2019-11-06 22:15:02,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:15:02,333 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:02,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:15:02,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:15:02,335 INFO L87 Difference]: Start difference. First operand 4102 states and 5846 transitions. Second operand 5 states. [2019-11-06 22:15:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:04,664 INFO L93 Difference]: Finished difference Result 5922 states and 8440 transitions. [2019-11-06 22:15:04,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:04,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-06 22:15:04,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:04,681 INFO L225 Difference]: With dead ends: 5922 [2019-11-06 22:15:04,681 INFO L226 Difference]: Without dead ends: 4104 [2019-11-06 22:15:04,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:15:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2019-11-06 22:15:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 3870. [2019-11-06 22:15:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3870 states. [2019-11-06 22:15:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5552 transitions. [2019-11-06 22:15:04,853 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5552 transitions. Word has length 157 [2019-11-06 22:15:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:04,853 INFO L462 AbstractCegarLoop]: Abstraction has 3870 states and 5552 transitions. [2019-11-06 22:15:04,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:15:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5552 transitions. [2019-11-06 22:15:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:15:04,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:04,860 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, 1, 1] [2019-11-06 22:15:04,860 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash 650703790, now seen corresponding path program 1 times [2019-11-06 22:15:04,861 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:04,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459613847] [2019-11-06 22:15:04,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:05,138 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:15:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:05,168 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 22:15:05,169 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459613847] [2019-11-06 22:15:05,169 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:05,169 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:15:05,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349108160] [2019-11-06 22:15:05,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:15:05,170 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:15:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:05,171 INFO L87 Difference]: Start difference. First operand 3870 states and 5552 transitions. Second operand 4 states. [2019-11-06 22:15:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:07,185 INFO L93 Difference]: Finished difference Result 9450 states and 13542 transitions. [2019-11-06 22:15:07,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:15:07,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-11-06 22:15:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:07,213 INFO L225 Difference]: With dead ends: 9450 [2019-11-06 22:15:07,214 INFO L226 Difference]: Without dead ends: 7632 [2019-11-06 22:15:07,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7632 states. [2019-11-06 22:15:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7632 to 3878. [2019-11-06 22:15:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-11-06 22:15:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5560 transitions. [2019-11-06 22:15:07,428 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5560 transitions. Word has length 158 [2019-11-06 22:15:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:07,429 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5560 transitions. [2019-11-06 22:15:07,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:15:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5560 transitions. [2019-11-06 22:15:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:15:07,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:07,437 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, 1, 1, 1] [2019-11-06 22:15:07,438 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash 822174137, now seen corresponding path program 1 times [2019-11-06 22:15:07,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:07,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756354949] [2019-11-06 22:15:07,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:07,808 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:15:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:07,894 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 22:15:07,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756354949] [2019-11-06 22:15:07,895 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:07,895 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:15:07,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043256686] [2019-11-06 22:15:07,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:15:07,896 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:07,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:15:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:15:07,896 INFO L87 Difference]: Start difference. First operand 3878 states and 5560 transitions. Second operand 5 states. [2019-11-06 22:15:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:10,537 INFO L93 Difference]: Finished difference Result 11252 states and 16069 transitions. [2019-11-06 22:15:10,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:10,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-11-06 22:15:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:10,551 INFO L225 Difference]: With dead ends: 11252 [2019-11-06 22:15:10,551 INFO L226 Difference]: Without dead ends: 7421 [2019-11-06 22:15:10,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:15:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2019-11-06 22:15:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 7419. [2019-11-06 22:15:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7419 states. [2019-11-06 22:15:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 10484 transitions. [2019-11-06 22:15:10,908 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 10484 transitions. Word has length 159 [2019-11-06 22:15:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:10,908 INFO L462 AbstractCegarLoop]: Abstraction has 7419 states and 10484 transitions. [2019-11-06 22:15:10,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:15:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 10484 transitions. [2019-11-06 22:15:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:15:10,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:10,925 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, 1, 1, 1] [2019-11-06 22:15:10,925 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2024755154, now seen corresponding path program 1 times [2019-11-06 22:15:10,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:10,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623954768] [2019-11-06 22:15:10,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 22:15:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 22:15:11,422 INFO L172 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-06 22:15:11,423 INFO L475 BasicCegarLoop]: Counterexample might be feasible